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Sangha, K. S.
- Comparative Biology of Clostera fulgurita (Walker) (Lepidoptera : Notodontidae) on Different Clones of Poplar (Populus deltoides) in Punjab
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Indian Forester, Vol 134, No 12 (2008), Pagination: 1646-1657Abstract
The studies on bioecology of Poplar leaf Defoliator, Clostera fulgurita (Walker) (Lepidoptera: Notodontidae) on Poplar were carried out at Entomological Research Farm, Punjab Agricultural University, Ludhiana. Biological studies revealed that the clones PL1, PL5 and PL7 had no effect on the duration of eggs, larvae, pupae and adults longevity. The egg, larval, pupal stage and adult longevity ranged from 3 to 6.42, 14.61 to 43.30, 6.50 to 55.50 and 4.93 to 7.35 days respectively. The defoliator had ten generations/year and the time taken to complete a generation varied from 27 to 94 days. Measurements of eggs, larvae, pupae and adults varied from 0.52 to 0.59 mm, 3.37 to 41.31 mm, 15.85 to 17.88 mm, and 2.87 to 3.87 cm (wing expanse) and 1.53 to 1.55 cm (body length) respectively. Pupation occurred in thin hairy cocoon between two leaves held together by silken thread. Fecundity varied from 268 - 669 among the clones. Maximum adult emergence and mating took place during 5.00 - 9.00 hours.Keywords
Biology, Clostera fulgurita, Poplar Clones, Punjab
- Biology of Asphadastis Cryphomycha meyrick (Lepidoptera : Pyralidae) on Poplar in Punjab
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Indian Forester, Vol 133, No 12 (2007), Pagination: 1669-1674Abstract
Biology of Asphadastis cryphomycha Meyrick was studied on Populus deltoides under screen house conditions. Duration of the egg stage ranged from 4.40 to 6.90 days during different months. Total larval period, prepupal and pupal period varied from 12.60 ± 0.15 to 19.10 ± 0.17, 2.20 ± 0.15 to 89.60 ± 0.65 (December to March), and 4.60 ± 0.15 to 8.20 ± 0.81 days. The adults emerged during 23.00 to 4.00 hours (24 hour time). Longevity of females was more than males. The average fecundity ranged from 22.60 ± 2.18 to 49.60 ± 7.36 eggs during different months. The pre-oviposition, oviposition and post-oviposition periods were recorded. The webber passed through eight generations per year. Leaf area fed by the larval instars has been worked out. Detailed measurements of the various stages were recorded.- Field Evaluation of Different Insecticides against Bark Eating Caterpillar, Indarbela quadrinotata (Walker) on Populus deltoides
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Indian Forester, Vol 131, No 5 (2005), Pagination: 694-700Abstract
Efficacy of different insecticides against bark eating caterpillar, I. quadrinotata was tested in the field on four years old Poplar plantation using a motorized sprayer. Five insecticides, viz., Sevin 50WP (carbaryl), Dursban 20EC (chlorpyriphos), Thiodan 35EC (endosulphan), Ekalux 25EC (quinalphos) and Curacron 50 EC (profenophos) at 0.05 per cent concentration, were tested in randomized block design with four replications. All the insecticides were significantly better than the untreated control. However, Sevin 50WP resulted in the maximum reduction in insect population (96.8 PROC) whereas Curacron 50EC, the minimum (88.9 PROC) after 15 days of treatment among the five insecticides tested. The use of motorized sprayer proved more effective as this increased the height of spray and coverage area.- Studies on Seasonal History, Host Range and Nature of Damage Caused by Asphadastis cryphomycha Meyrick (Lepidoptera: Pyralidae) on Poplar in Punjab
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Indian Forester, Vol 130, No 12 (2004), Pagination: 1439-1443Abstract
The study on the scasonal history, host range and nature of damage was carried at the villages, Khera bet, Lalton and Tajpur in the Ludhiana district. Two peaks of the insect population were observed during April-June and September-November. The larval and pupal population per web varied from 0.00-6.85 and 0.00-0.55 respectively. The first and second instars of the leafwebber were found feeding on leaves along the midrib and vein whereas the third, fourth and fifth ins tars remained feeding inside the web, made by webbing 2-3 leaves together with silken threads. In the field twigs with webs varied from 10.00-67.50 per cent and webbed leaves/twigs varied from 20-60 percent.- Outbreak of Bihar Hairy Caterpillar , Spilosoma obliqua on Paulownia fortunei at Ludhiana (Punjab)
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Indian Forester, Vol 129, No 10 (2003), Pagination: 1295-1296Abstract
No abstract- Brachymeria Species (Hymenoptera: Chalcididae) - a Larval Pupal Parasitoid of Asphadastis cryphomycha Meyrick, Poplar Leaf Webber in Punjab
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Indian Forester, Vol 127, No 1 (2001), Pagination: 133-134Abstract
No abstract- Standardization of Release Rate of Trichogramma chilonis (Ishii) in Bio-Intensive Management of Chilo partellus (Swinhoe) in Fodder Maize
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Authors
Affiliations
1 Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana – 141004, Punjab, IN
2 Department of Entomology, Punjab Agricultural University, Ludhiana – 141004, Punjab, IN
1 Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana – 141004, Punjab, IN
2 Department of Entomology, Punjab Agricultural University, Ludhiana – 141004, Punjab, IN
Source
Journal of Biological Control, Vol 31, No 4 (2017), Pagination: 254-258Abstract
The early season attack of Chilo partellus, in kharif sown fodder maize inflicts appreciable losses, if unchecked. Biointensive management with the use of egg parasitoid Trichogramma chilonis Ishii in fodder maize through different doses and release rate was standardized. The results of the trials from two years showed that damage parameters like Leaf Injury (LI), recorded three weeks after parasitoid release from 0.25-6.00 per cent across different treatments whereas in untreated control it was 6.50-13.25 %, respectively. Similarly the observations on percent DH patterns in different treatments varied from 0.62-3.75 % as compared to control (5.50-9.0 %). Furthermore, the per cent reduction in damage was substantially low with the second inundative release of the parasitoid than plots receiving a single release of bio-agent at a given dose. The proportion of DH recorded at three weeks after release was significantly lower (1.0 and 0.62%) in plots with t-cards @ 125,000 parasitized eggs in two releases as compared with other treatments. Additionally the green fodder yield obtained in promising treatment was statistically superior (445 q ha-1) to 392 q ha-1 GFY as recorded in the untreated control and other lower dose treatments except the plots receiving the highest dose of parasitoid release (450q ha-1). Thus the results suggested that field release of T. chilonis @ 125,000 parasitoids per hectare in two releases helps in substantial reduction of C. partellus inflicted damage with high economic returns.Keywords
Chilo partellus, Deadhearts, Fodder Maize, Leaf Injury, Trichogramma chilonis.Full Text
References
- Farid A, Khan MIN, Khan A, Khattak SUK, Amamzeb, Sattar A. 2007. Studies on maize stem borer, Chilo partellus in Peshawar Valley. Pak J. Zool. 39(2):127–131 Aggarwal N, Jindal J. 2013. Validation of biocontrol technology for suppression of Chilo partellus (Swinhoe) on kharif maize in Punjab. J Biol Control 27(4): 278-284.
- Arabjafari KH, Jalali SK. 2007. Identification and analysis of host plant resistance in leading maize genotypes against spotted stem borer, Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae). Pak. J Biol Sci. 10: 1885–1895. Crossref. PMid:19086556
- Cheema HS, Singh B. 1991. Software Statistical Package CPCS-I. Department of Statistics. Punjab Agricultural University, Ludhiana, India.
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- Gomez KA, Agomez A. 1984. Statistical Procedures for Agricultural Research, 2nd edn. Wiley–Interscience, New York. 680 pp.
- Jalali SK, Singh SP. 2006. Biological control of Chilo partellus using egg parasitoid Trichogramma chilonis and Bacillus thuringiensis. Indian J. Agri Res. 40(3): 183–189.
- Pal R, Singh G, Prased CS, Ali N, Kumar A, Dhaka SS. 2009. Field evaluation of bio-pesticide and bio-agent against maize stem borer, Chilo partellus (Swinhoe) in maize. Ann Pl Prot Sci. 17: 325–327.
- Pingali PI. 2001. CIMMYT. 1999-2000: World maize facts and trends, meeting world maize need, technological opportunities and priorities for the public sector. CIMMYT, Mexico. D.F: 57.
- Rawat US, Pawar AD, Joshi V.1994. Impact of inundative releases of Trichogramma chilonis in control of maize stem borer, Chilo partellus (Swinhoe) in Himachal Pradesh. Pl Prot Bull. 46: 28–30.
- Siddiqui KH, Marwaha KK. 1993. The vistas of maize entomology in India, Kalyani Publishers, New Delhi, India, 185 pp.
- Somchaudhary AK, Dutt N. 1988. Influence of hosts and host ages on bionomics of Trichogramma perkinsi Girault and Trichogramma australicum Girault. Indian J Ent. 50: 374–379
- On-Farm Impact of Egg Parasitoid, Trichogramma Spp. Against Lepidopteran Pests in Organic Basmati Rice
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Authors
Affiliations
1 Biocontrol Section, Department of Entomology, Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
1 Biocontrol Section, Department of Entomology, Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
Source
Journal of Biological Control, Vol 32, No 2 (2018), Pagination: 116-120Abstract
On farm impact of Trichogrammatids was studied against lepidopteran pests, i.e., yellow stem borer, Scirpophaga incertulas (Walker) and leaf folder, Cnaphalocrocis medinalis (Guenee) in organic basmati rice (var. Pusa 1121) over an area of 20 and 60 hectares during 2014 and 2015, respectively. Six augmentative releases of Trichogramma chilonis and T. japonicum each @ 1,00,000 parasitoids/ha were made starting from 30 days after transplanting (DAT) and was compared with untreated control. Based on the overall mean, the biocontrol treatment (1.74% DH) was significantly effective in reducing the dead heart incidence as compared to untreated control (4.52% DH). The reduction in dead hearts was 61.50 per cent in biocontrol over untreated control. The mean incidence of white ears was also significantly lower in biocontrol field (2.05%) as against untreated control (4.89%) resulting in a reduction of 58.08 per cent. Similarly, leaf folder damage in biocontrol (2.04% LFDL) resulted in 62.50 per cent reduction over untreated control (5.44% LFDL). Grain yield in biocontrol fields (29.81 q/ha) was 18.76 per cent more than the untreated control (25.10 q/ha). The increase in yield due to control of stem borers and leaf folder in biocontrol fields resulted in an additional benefit of INR 16332/- and INR 9818/- during 2014 and 2015, respectively. Conclusively, 6 releases of T. chilonis and T. japonicum each @ 1,00,000/ha resulted in lower incidence of rice insect pests and higher grain yield in organic basmati rice with an additional benefit over untreated control.Keywords
Biocontrol, Cnaphalocrocis medinalis, Scircophaga incertulas, Trichogramma Augmentation.Full Text
References
- Brar KS, Singh J, Shenhmar M, Bakhetia DRC, Singh J. 1999. Insect and Environment. pp. 206–210. In: Pajni H R, Tewari PK, Kaur D (Eds.). Evaluation of Trichogramma chilonis Ishii and T. japanicum Ashmead for the control of leaf folder and stem borer of rice in Punjab. Society of Environment Scientists, Chandigarh.
- Bueno R, Bueno AD, Parra JRP, Vieira SS, de Oliveira LJ. 2010. Biological characteristics and parasitism capacity of Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) on eggs of Spodoptera frugiperda (J. E. Smith) (Lepidoptera, Noctuidae). Revista Brasileira de Entomologia 54: 322–327. https://doi.org/10.1590/S0085-56262010000200016
- Dhaliwal GS, Jindal V and Dhawan AK. 2010. Insect pest Problems and crop losses: changing trends. Indian J Ecol. 37: 1–7.
- Garg DK, Kumar P, Singh RN, Pathak M. 2002. Role of parasitoid Trichogramma japonicum and other natural enemies in the management of yellow stemborer and leaffolder in basmati rice. Indian J Ent. 64: 117–123.
- Gomez KA, Gomez AA. 1984. Statistical procedures for agricultural research, 2nd ed. John Wiley and Sons Inc, New York, USA, 704 p.
- Kalode MB. 2005. Insect pests of rice and their management. In: Sharma SD and Nayak BC (Eds.). Rice in Indian Perspective. Today and Tomorrow Printers and Publishers, India. pp. 819-854.
- Karthikeyan K, Jacob S, Purushothaman SM. 2007. Field evaluation of egg parasitoids, Trichogramma japonicum Ashmead and Trichogramma chilonis Ishii, against rice yellow stemborer and leaffolder. J Biol Control 21: 145–148.
- Kaur R, Brar KS. 2008. Evaluation of different doses of Trichogramma species for the management of leaf folder and stem borer on Basmati rice. J Biol Control 22(1): 131–135.
- Ko K, Liu Y, Hou M, Babendreier, Zhang F, Song K. 2014. Evaluation for potential Trichogramma (Hymenoptera: Trichogrammatidae) strains for control of the striped stem borer (Lepidoptera: Crambidae) in the Greater Mekong Subregion. J Econ Entomol. 107(3): 955–963. https://doi.org/10.1603/EC13481
- Kumar S, Khan MA. 2005. Bio-efficacy of Trichogramma spp. against yellow stemborer and leaffolder in rice ecosystem. Ann Pl Prot Sci. 13: 97–99.
- Nathan SS, Chung PG, Murugan K. 2004. Effect of botanicals and bacterial toxin on the gut enzyme of Cnaphalocrocis medinalis. Phytoparasitica 32: 433– 443. https://doi.org/10.1007/BF02980437
- Sagheer M, Ashfaq M, Mansoor-ul-Hasan, Rana SA. 2008. Integration of some biopesticides and Trichogramma chilonis for the sustainable management of rice leaffolder, Cnaphalocrocis medinalis (Guenee) (Lepidoptera: Pyralidae). Pak J Agri Sci. 45: 69–74.
- Shawer MB, EL-Agamy FM, Hendawy AS, Refaei EA. 2013. Effect of Trichogramma evanescens West release in rice stem borer control. J Plant Prot Path Mansoura Univ. 4(3): 261–264.
- Singh J, Dhaliwal GS, Singh J, Shera PS. 2002. Changing scenario of rice insect pests in Punjab and their management strategies. Indian J Ecol. 29: 208–220.
- Singh J. 2011. Impact assessment study of IPM basmati project for boosting diversification process in Punjab. Navajbai Rata Tata Trust, Mumbai, India, 43 p.
- USDA-FAS. 2016. World Agricultural Production. Available at: http://usda.mannlib.cornell.edu/usda/ current/worldag-production/worldag-production12-09-2016.pdf.
- Impact of Bio-Intensive Integrated Pest Management Practices on Insect Pests and Grain Yield in Basmati Rice
Abstract Views :265 |
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Authors
Affiliations
1 Biocontrol Section, Department of Entomology, Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
1 Biocontrol Section, Department of Entomology, Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
Source
Journal of Biological Control, Vol 32, No 2 (2018), Pagination: 137-141Abstract
Bio-intensive pest management practices were compared with farmer’s practices and untreated control in basmati rice at village Sahauli (Punjab). BIPM practices involved green manuring; seed treatment; alternate wetting and drying of the field; installation of pheromone traps and bird perches; augmentative releases of Trichogramma spp.; spray of Neem oil 1%. The farmer’s practices comprised the applications of chemical insecticides. The mean leaffolder damage was 3.12, 1.90 and 5.41 per cent in BIPM, farmer’s practice and untreated control, respectively. The dead heart incidence was 2.49 per cent in BIPM, 1.16 per cent in farmer’s practice and 4.30 per cent in untreated control. Similarly, the mean incidence of white earheads was 3.31, 1.78 and 5.06 per cent in BIPM, farmer’s practice and untreated control, respectively. Highest grain yield was recorded in farmer’s practice fields (30.63 q/ha) followed by yield in BIPM fields (28.07 q/ha). These yields were significantly better than untreated control (25.18 q/ha).The population of natural enemies was higher in BIPM fields as compared to farmer’s practiced fields.Keywords
Basmati, Bio-Intensive Pest Management, Leaf Folder, Natural Enemies, Stem Borer.Full Text
References
- Aggarwal N, Sharma S, Jalali SK. 2016. On-farm impact of biocontrol technology against rice stem borer, Scircophaga incertulas (Walker) and rice leaf folder Cnaphalocrocis medinalis (Guenee) in aromatic rice. Entomol Gen. 36: 137–148. https://doi.org/10.1127/ entomologia/2016/0135
- APEDA. 2017. Agricultural and Processed Food Products Export Development Authority. Available at: http: // agriexchange. apeda.gov.in/product_profile/prodintro/ Basmati_Rice.aspx
- Garg DK, Kumar P, Singh RN, Pathak M. 2002. Role of parasitoid Trichogramma japonicum and other natural enemies in the management of yellow stemborer and leaffolder in basmati rice. Indian J Entomol. 64:117–123.
- Gomez KA, Gomez AA. 1984. Statistical procedures for agricultural research, 2nd ed. John Wiley and Sons Inc, New York, USA, 704 p.
- GRiSP. 2013. Global Rice Science Partnership – Rice Almanac, 4th edition. International Rice Research Institute, Los Ba-os, Philippines, 283 p.
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- Karthikeyan K, Jacob S, Beevi P, Purushothaman SM. 2010. Evaluation of different integrated pest management modules for the management of major pests of rice (Oryza sativa). Indian J Agric Sci.: 80: 59–62.
- Karthikeyan K, Jacob S, Purushothaman SM. 2007. Field evaluation of egg parasitoids, Trichogramma japonicum Ashmead and Trichogramma chilonis Ishii, against rice yellow stemborer and leaffolder. J Biol Control 21: 145–148.
- Kaur R, Brar KS, Singh J, Shenhmar M. 2007. Large scale evaluation of bio-intensive management for leaf folder and stem borer on basmati rice. J Biol Control 21: 255–259.
- Khan RA, Khan JA, Jamil FF, Hamed M. 2005. Resistance of different Basmati rice varieties to stem borers under different control tactics of BIPM and evaluation of yield. Pak J Bot. 37: 319–324.
- Kumar S, Khan MA. 2005. Bio-efficacy of Trichogramma spp against yellow stem borer and leaf folder in rice ecosystem. Ann Plant Protect Sci. 13: 97–99.
- Kumar S, Maurya RP, Khan MA. 2007. Impact of biointensive pest management strategies on yellow stem borer and leaf folder in rice and their effect on the economics of production. J Entomol Res. 31:11–13.
- Matteson PC. 2000. Insect pest management in tropical Asian irrigated rice. Ann Rev Entomol. 45: 549–574
- https://doi.org/10.1146/annurev.ento.45.1.549
- Sagheer M, Ashfaq M, Mansoor-ul-Hasan, Rana SA. 2008. Integration of some biopesticides and Trichogramma chilonis for the sustainable management of rice leaffolder, Cnaphalocrocis medinalis (Guenee) (Lepidoptera: Pyralidae). Pak J Agri Sci. 45: 69–74.
- Sharma OP, Garg DK, Trivedi TP, Satpal C, Singh SP. 2008. Evaluation of pest management strategies in organic and conventional Taraori Basmati Rice (Oryza Sativa L) farming system. Indian J Agric Sci. 78: 862–867.
- Sharma S, Aggarwal N. 2014. Time-linked dosage appraisal of Trichogrammatids against Cnaphalocrocis medinalis (Guenée) and Scirpophaga incertulas (Walker) in organic aromatic rice. Eco Environ Conserv. 20: 111–118.
- Singh J. 2011. Impact Assessment study of IPM Basmati Project for Boosting Diversification Process in Punjab. Navajbai Rata Tata Trust, Mumbai, India, 43 p.
- USDA-FAS. 2016. World Agricultural Production. Available at: http://usda.mannlib.cornell.edu/usda/current/worldagproduction/ worldag-production-12-09-2016.pdf
- Natural enemies of whitefly, Bemisia tabaci (Gennadius) on cotton in Punjab, India
Abstract Views :282 |
PDF Views:132
Authors
Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
1 Department of Entomology, Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
Source
Journal of Biological Control, Vol 32, No 4 (2018), Pagination: 270-274Abstract
The whitefly, Bemisia tabaci (Gennadius) is a polyphagous pest, widely distributed in diverse agroecosystems across the globe. Several bioagents including predators and parasitoids from diverse groups have been recorded against whitefly worldwide. A field survey was conducted during 2016 and 2017 in different cotton growing districts of Punjab to record the natural enemies associated with whitefly. Sixteen species of natural enemies were recorded, including 7 species of insect predators; 2 species of parasitoids and 7 species of spiders. Coccinella septempunctata Linneaus, Cheilomenes sexmaculata (Fabricius) and Brumoides suturalis (Fabricius), Serangium parcesetosum Sicard, Chrysoperla zastrowi sillemi (Esben-Peterson), Zanchius breviceps (Wagner), Geocoris sp. and spiders were most commonly recorded predators. Out of these, Chrysoperla was the predominant species. Encarsia lutea (Masi) and Encarsia sophia (Girault & Dodd) were the two parasitoids that emerged from whitefly pupae. The mean parasitization of whitefly by Encarsia spp. in different cotton growing areas of Punjab was 5.20 per cent (range = 1.5 to 9.1 %).Keywords
Cotton, Parasitoid, Predator, Whitefly.Full Text
References
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- Bioformulations for Management of Pod Borer, Helicoverpa armigera (Hubner) in Mungbean (Vigna radiata L.)
Abstract Views :322 |
PDF Views:168
Authors
Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana-141004, Punjab, IN
1 Department of Entomology, Punjab Agricultural University, Ludhiana-141004, Punjab, IN
Source
Journal of Biological Control, Vol 33, No 1 (2019), Pagination: 76-79Abstract
Effectiveness of bioformulations was tested against pod borer, Helicoverpa armigera (Hubner) in mungbean during Kharif 2015 and 2016 at Punjab Agricultural University, Ludhiana. Among the bioformulations the per cent pod damage and yield varied from 21.43 to 24.49 per cent and 5.50 to 8.53 q/ha respectively. During Kharif 2016, per cent pod damage and yield varied from 12.00 to 15.69 per cent and 6.30 to 9.33 q/ha respectivley. The chemical treatment Chlorpyrifos 20 EC (3.75 l/ha) was most effective in terms of pod damage reduction and yield of mungbean. The Bt formulations PDBC-BT1 and NBAIR-BTG4 (2%) and both doses of Delfin WG (1 and 2Kg/ha) were equally effective in controlling the H. armigera pod damage when compared to Chlorpyrifos 20EC. Myco Jaal (commercial formulation of Beauveria bassiana) was not effective in controlling the pod borer as compared to B. thuringiensis formulations in mungbean. The B. thuringiensis formulations Delfin (commercial) and PDBC/NBAIR (2%) effectively reduced the pod damage by H. armigera in mungbean and can be integrated in IPM programme for pulse crop protection.Keywords
Bioformulations, Helicoverpa armigera, Mungbean, Pod Damage.Full Text
References
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- Evaluation of Anthocorid Predator, Blaptostethus pallescens Poppius against Spider Mite, Tetranychus urticae Koch on Okra under Insect Net Cage Condition
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Authors
Affiliations
1 Biocontrol Section, Department of Entomology, Punjab Agricultural University, Ludhiana – 141004, Punjab, IN
1 Biocontrol Section, Department of Entomology, Punjab Agricultural University, Ludhiana – 141004, Punjab, IN
Source
Journal of Biological Control, Vol 33, No 3 (2019), Pagination: 236-241Abstract
The present study deals with the evaluation of anthocorid bug, Blaptostethus pallescens Poppius against Tetranychus urticae Koch on okra (Abelmoschus esculentus L.), conducted in Karif season (June-August) during 2013-2015 in the net cage condition at Entomological Research Farm, Punjab Agricultural University, Ludhiana. The 6-7 days old nymphs of B. pallescens @ 10, 20 and 30 nymphs/m2 were released at weekly interval on the mite infested plants and these were compared with chemical control (Omite @ 300ml/acre at 10 days interval) and untreated control. The releases of predators and acaricidal spray on okra were found better than control in suppressing the population of T. urticae. The release of B. pallescens @ 30 nymphs/m2 was found most effective with a 75.86 to 81.20 per cent reduction of mite population over control. It was statistically at par with chemical control, where 84.04 to 91.66 per cent reduction of mite population over control was recorded. There was no significant difference observed in the reduction of mite population of the plots released with 20 and 10 nymphs/m2 of B. pallescens. The yield of okra from the plots of chemical control was recorded highest (52.70 q/acre), followed by 45.05 q/acre from the plots released with a B. pallescens @ 30 nymphs/m2 at seven days interval. The study concluded that, integrating predator, B. pallescens @ 30 nymphs/plant along with acaricide (Omite 300 ml/acre) as a component of IPM for the management of two-spotted spider mite, T. urticae on okra under net house conditions.
Keywords
Anthocorid Bug, Blaptostethus pallescens, Okra, Tetranychus urticae, Two-Spotted Red Spider Mite.Full Text
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- Evaluation of Eucalyptus Clones for Susceptibility to The Gall Wasp Letocybe invasa Fisher and La Salle
Abstract Views :83 |
PDF Views:57
Authors
Affiliations
1 Department of Forestry and Natural Resources, Punjab Agricultural University, Ludhiana 141004, IN
2 Department of Botany, Punjab Agricultural University, Ludhiana 141004, IN
1 Department of Forestry and Natural Resources, Punjab Agricultural University, Ludhiana 141004, IN
2 Department of Botany, Punjab Agricultural University, Ludhiana 141004, IN
Source
Indian Journal of Entomology, Vol 84, No 1 (2022), Pagination: 178-180Abstract
This study investigates the variation among Eucalyptus clones for incidence of gall wasp (Letocybe invasa) and relative changes in biochemical parameters. The three years, and replicated clonal trial involved 14 clones with monthly observations made on the gall wasp incidence. Significant variation was found among the clones, with maximum incidence being in F-316 and relatively the least incidence in C-413, PE-11, PE-14 and C-72. Gall wasp incidence gradually increased from January to April and declined thereafter. The total soluble sugars and phenol content in the infested leaves were found to increase by 49.2 and 22.8% respectively, whereas the protein content decreases (8.8% decrease).Keywords
Punjab, Eucalyptus, Letocybe invasa, Incidence, Soluble Sugar, Total Phenol, Protein, Seasonal Incidence, Clone, F-316, C-413, PE-11, Pe-14 and C-72.Full Text
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- Variation in Flowering Behaviour and Honey Bee Visitation on Eucalyptus Clones
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PDF Views:74
Authors
Affiliations
1 Department of Forestry and Natural Resources, Punjab Agricultural University, Ludhiana 141004, Punjab, IN
2 Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab, IN
1 Department of Forestry and Natural Resources, Punjab Agricultural University, Ludhiana 141004, Punjab, IN
2 Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab, IN
Source
Indian Journal of Entomology, Vol 84, No 4 (2022), Pagination: 947-950Abstract
With the adoption of clonal forestry by the farmers on large tracts in north-western India, the reports of negligible flowering in Eucalyptus clonal plantations need to be analysed. This study reports the results from the experimental trial involving 14 clones replicated thrice in randomized block design with plot size of 5 trees. Floral buds appeared from June and continued up to July. Profuse flowering was recorded only on three clones i.e., PE-7, PE-8 and PE-9. On the other hand, no floral buds could be seen on C-72, C-413, PE-12 and PE-14. All the four honey bee species i.e., Apis mellifera L. (Italian honey bee), A. dorsata F. (rock bee), A. cerana indica F. (Indian honey bee) and A. florea (little bee) visited the flowers. The frequency of their visit was maximum (7.3/ 2 min) during the afternoon (1 pm) and the lowest (4.9) in the evening. The maximum honey bee visitation was observed on clone PE-9.Keywords
Apiculture, Eucalyptus, clonal plantations, agroforestry, diurnal variation, flowering span, Apis mellifera, A. dorsata, A.cerana indica, A. florea, flower visitors, frequency, durationFull Text
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