Brar, K. S.

• Influence of Weather Factors and Spray Patterns on Wheat Aphids and their Coccinellid Predator

Abstract Views :247  |  PDF Views:125

Authors

Sanehdeep Kaur ¹, Vijay Kumar ², Paramjit Singh ², K. S. Brar ²

Affiliations
1 Department of Zoology, Guru Nanak Dev University, Amritsar 143005, Punjab, IN
2 Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab, IN

Source

Journal of Biological Control, Vol 23, No 4 (2009), Pagination: 375-379

Abstract

Wheat is a premier winter cereal crop in India. Among the various insect pests, aphids appear as a complex of species including Sitobion avenae (F.), S. miscanthi (Takahashi), Rhopalosiphum maidis (Fitch) and R. padi (L.). Coccinella septempunctata L. is a dominant predator of aphids. Various spray patterns were tested to check their effectiveness against aphids. All the treatments more effectively controlled the aphids compared to control. However, the insecticides adversely affected the predator population. The predator populations was reduced by 87.5, 85.4 and 78.9%, respectively, one day after spray in completely sprayed, sprayed strip and unsprayed strip plots, whereas the reduction was only 22.8% in peripherally sprayed plot. The predator recovery started after 3 days in all the treated plots but it was very slow in the completely sprayed plot. Among all the treatments, the peripherally treated plot conserved maximum predator population and controlled the multiplication of the pest.

Keywords

Wheat Aphids, Coccinellid, Coccinella septempunctata, Spray Pattern, Recovery, Weather Factors.

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References

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• Management of Leaf Folder and Stem Borer on Coarse and Basmati Rice with Organic and Inorganic Practices

Abstract Views :219  |  PDF Views:121

Authors

Ramandeep Kaur ¹, K. S. Brar ¹, Rabinder Kaur ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana -141004, Punjab, IN

Source

Journal of Biological Control, Vol 22, No 1 (2008), Pagination: 137-141

Abstract

An experiment on the management of rice leaf folder and stem borer in two rice varieties, viz., PR 116 and Basmati 386, was conducted in the organic field area of Department of Agronomy and Agromet, PAU, Ludhiana, by comparing three treatments, viz, organic, recommended and integrated practices. Organic practices and integrated practices (seven releases of Trichogramma chilonis and T. japonicum @ 100000 each at weekly interval starting 30 DAT) proved to be effective in the management of rice leaf folder and stem borer in both the rice varieties.

Keywords

Basmati Rice, Egg Parasitoids, Organic Rice, Rice Leaf Folder, Stem Borer.

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• Effect of Lipaphis erysimi (Kaitenbach) Numbers on the Feeding Potential of Coccinella septempunctata Linnaeus

Abstract Views :188  |  PDF Views:110

Authors

A. S. Brar ¹, J. S. Kular ¹, K. S. Brar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana- 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 22, No 1 (2008), Pagination: 199-201

Abstract

Effect of population density of mustard aphid Lipaphis erysimi (Kaitenbach) on the feeding potential of second instar larva and adult of Coccinella septempunctata Linnaeus were studied under laboratory conditions. Aphids at various densities, viz., 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100, were provided to second instar larva and adult of C. septempunctata in two separate sets of experiments. Significantly highest (32.25) number of aphids were consumed by the second instar larva after 12 hour of release at population level of 90 aphids, which was on a par with population levels of 70 (26.050), 80 (30.75) and 100 (31.25) aphids. Significantly highest feeding rate of 2.68 aphids/hour was recorded at 90 aphids, which was on a par with population level of 80 (2.55) and 100 (2.60) aphids. Similarly, significantly highest (55.00) number of aphids was consumed by the adult after 12h of release at population level of 100 aphids, which was on par with population level of 60 (45.00), 70 (45.00), 80 (44.50) and 90 (52.00) aphids. Significantly highest feeding rate of 4.57 aphids per hour was recorded at population level of 100 aphids, however it was on par with population level of 90 (4.33) aphids. The studies revealed that the feeding potential of larva and adult of C. septempunctata significantly increased with increase in population density of mustard aphid.

Keywords

Coccinella septempunctata, Feeding Potential, Lipaphis erysimi, Population Density.

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• Evaluation of Different Strains of Trichogramma chilonis Ishii for the Suppression of Sugarcane Early Shoot Borer, Chilo infuscatellus Snellen

Abstract Views :234  |  PDF Views:148

Authors

Satnam Singh ¹, Maninder Shenhmar ¹, K. S. Brar ¹, S. K. Jalali ²

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana - 141004, Punjab, IN
2 Project Directorate of Biological Control, Post Box No.2491, H. A. Farm Post, Hebbal, Bangalore - 560024, IN

Source

Journal of Biological Control, Vol 21, No 2 (2007), Pagination: 247-253

Abstract

The efficacy of high temperature tolerant (PDBC strain) and Ludhiana (Punjab) strain of Trichogramma chilouis Ishii against early shoot borer Chilo infuscatellus Snellen was evaluated in farmers' field during 2004 and 2005. The PDBC strain was released from April to June @ 50000, 40000 and 30000 parasitoids/ha. and the Ludhiana strain @ 50000 parasitoids/ha. Nine releases of PDBC strain and Ludhiana strain @ 50000 parasitoids/ha were as effective as application of cartap hydrochloride (Padan 4G) @ 25 kg/ha in reducing the incidence of C. infuscatellus by 52.7 and 50.5% over untreated control, respectively. At lower two doses, the reduction was 29.03 and 34.7 per cent over untreated control and was significantly better as compared to untreated control and mechanical control (removal of dead hearts). The maximum parasitoid recovery (10.71% parasitization) was recorded with PDBC strain @ 50,000 parasitoids/ha and was on par with Ludhiana strain (9.88% parasitization) and significantly higher than that with lower doses of PDBC strain and control. Based on reduced pest incidence, higher parasitism and yield, the releases of T. chilonis (PDBC strain/Ludhiana) @ 50000 parasitoids/ha at 10 days interval from April to June can be successfully used for the suppression of early shoot borer.

Keywords

Chilo infuscatellus, Efficacy, Strains, Trichogramma chilonis.

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• Large-Scale Evaluation of Bio-Intensive Management for Leaf Folder and Stem Borer on Basmati Rice

Abstract Views :244  |  PDF Views:108

Authors

Ramandeep Kaur ¹, K. S. Brar ¹, Jagmohan Singh ¹, Maninder Shenhmar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana-141004, Punjab, IN

Source

Journal of Biological Control, Vol 21, No 2 (2007), Pagination: 255-259

Abstract

Bio-intensive pest management of leaf folder and stem borer was demonstrated on basmati rice at village Kami Khera (District Ferozepur), Punjab over 60 hectares during 2002-2005. Bio-intensive management package included one application of cartap hydrochloride, (Padan @ 25 kg/ha) and seven weekly releases of Trichogruimnu cliilonis and T. japonicum @100000/ha each starting from 30 days after transplantation. The mean per cent leaves folded (2.02), dead hearts (3.05), white ears (5.45) and yield (43.99 q/ha) in BPIM were on par with chemical control, (mean per cent leaves folded (1.77), dead hearts (2.62), white ears (4.48) and yield (44.83 q/ha)), and both the treatments were significantly better than control. The cost: benefit ratio was 1:4.01 and 1:4.68 for bio-intensive management practice and chemical control, respectively.

Keywords

Basmati Rice, BIPM, Rice Leaf Folder, Stem Borer, Trichogramma chilonis, T. japonicum.

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• Effect of Low Temperature Storage on the Efficiency of Three Species of Trichogrammatids

Abstract Views :199  |  PDF Views:112

Authors

Parminder Kumar ¹, Maninder Shenhmar ¹, K. S. Brar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana, 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 19, No 1 (2005), Pagination: 17-22

Abstract

The effect of low temperature (4 ± 0.5°C) and refrigerator storage on three trichogrammatids, viz Trichogramma chilonis Ishii, T. pretiosum Riley and T. brasiliense Ashmead was studied under laboratory conditions. T. chilonis and T. pretiosum can be stored for 20 days whereas T. brasiliense for 10 days without adversely affecting their emergence and parasitisation efficiency taking 60 per cent emergence and 60 per cent parasitism as standard. The emergence in 71 brasiliense reached zero per cent after 34 days of storage whereas 20.3 per cent was recorded in T. chilonis and 1S.7 per cent in T. pretiosum after 60 days of storage. T. chilonis showed the highest emergence and parasitization efficiency followed by T. pretiosum and T. brasiliense.

Keywords

Emergence, Parasitization Efficiency, Storage, Trichogrammatids.

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• Impact of Insecticides Recommended for Sugarcane on Parasitization and Emergence of High Temperature Tolerant and Ludhiana Strains of Trichogramma chilonis Ishii

Abstract Views :227  |  PDF Views:133

Authors

Satnam Singh ¹, M. Shenhmar ¹, K. S. Brar ¹, S. K. Jalali ²

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana, 141 004, Punjab, IN
2 Project Directorate of Biological Control, Post Bag No. 2491, H. A. Farm Post, Hebbal, Bangalore, 560 024, Karnataka, IN

Source

Journal of Biological Control, Vol 21, No 1 (2007), Pagination: 25-30

Abstract

The studies to evaluate the effect of insecticides recommended on sugarcane in Punjab, on parasitization and adult emergence of high temperature tolerant (PDBC, Bangalore) and Ludhiana (Punjab) strains of Trichogramma chilonis Ishii conducted during April-July 2004 at Entomological Research Farm and Biological Control Laboratory of Punjab Agricultural University, Ludhiana revealed that Ludhiana strain of T. chilonis was more tolerant to insecticides as compared to the high temperature tolerant strain. Among the insecticides, endosulfan (Thiodan 35EC) @ 395g a. i./ha was the safest followed by imidaeloprid (Conlidor 200 SL) @ 20g a, i./ha, triazophos (Hostathion 40EC) @ 600g a. i./ha, chlorpyriphos (Dursban 20EC) @ 175g a. i,/ha and malathion 50EC @ 1250g a. i./ha. The latter two at the applied doses were highly deleterious to the parasitoid.

Keywords

Insecticides, Parasitism, Strain, Sugarcane, Trichogramma chilonis.

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• Field Efficacy of Fungal and Bacterial Antagonists against Brown Spot of Rice

Abstract Views :220  |  PDF Views:118

Authors

N. Joshi ¹, K. S. Brar ¹, P. P. S. Pannu ², Paramjit Singh ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab, IN
2 Department of Plant Pathology, IN

Source

Journal of Biological Control, Vol 21, No 1 (2007), Pagination: 159-162

Abstract

Efficacy of two antagonists, namely, Trichoderma harzianum and Pseudomonas fluorescens was evaluated against brown spot of rice under field conditions. Three sprays of P. fluorescens (Talc based) at weekly interval @10g per litre, proved effective in reducing the disease severity and increasing the yield. It reduced the severity from 35.8 percent to 24.5 percent in case of rice variety PR116 and from 20.1 percent to 8.5 percent in case of Basmati rice 386.

Keywords

Brown Spot, Rice, Pseudomonas fluorescens, Trichoderma harzianum.

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• Evaluation of Release Technology for Trichogralnma chilonis Ishii in the Management of Cotton Bollworms

Abstract Views :201  |  PDF Views:111

Authors

J. S. Virk ¹, K. S. Brar ¹, A. S. Sohi ¹, Maninder Shenhmar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University Ludhiana, 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 20, No 2 (2006), Pagination: 123-126

Abstract

Studies were carried out during 2003 and 2004 to find out the release technology of Trichogramma chilonis Ishii (weekly releases from July to October @ 1, 50, 000 ha) for the management of cotton bollworms. Releases as tricho-card (100, 150 and 200 points/ ha) were compared with adult releases. On the basis of incidencc of bollworms among fruiting bodies (17.63 and 16.79%), green bolls (26.87 and 14.14%), parasitization of Helicoverpa armigera (Hubner) eggs (17.41 and 19.64%) and seed cotton yield (8.24 and 9.26 q/ha). The releases as adult proved better. Releases at 200 points/ ha was better than releases at 100 and 150 points/ha.

Keywords

Bollworms, Cotton, Release Technology, Trichogramma chillonis.

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• Morphological and Biochemical Characterization of Bacillus thuringiensis Berliner Isolates and their Evaluation against Plutella xylostella Linnaeus

Abstract Views :243  |  PDF Views:158

Authors

Preetinder Kaur ¹, Neelam Joshi ¹, K. S. Brar ¹

Affiliations
1 Department of Microbiology, Punjab Agricultural University Ludhiana 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 20, No 2 (2006), Pagination: 191-195

Abstract

Eleven isolates of Bacillus thuringiensis were morphologically and biochemically characterized and evaluated for iasecticidal activity against Plutella xylostella Linnaeus under field-cum-laboratory conditions. All the isolates were gram positive, rod shaped, spore forming and showed typical colony morphology with mucoid or glistening surfaces having entire edges and density ranging between translucent to opaque. Glucose was fermented by all the cultures only with acid production. Xylose and Mannitol were fermented by Bt d and Bt VK isolates, respectively. All cultures were catalase positive, oxidase positive, nitrate reducing (except Bt d), degraded tyrosine, hydrolysed casein and starch and utilized citrate as a carbon source. Results of bioassay studies revealed that four isolates, namely, Bt 5, 4D4, Bt 9 and MTCC 868 caused complete mortality of the second instar larvae of Plutella xylostella within 96 hours at uniform concentration of 10⁹ spores/ml.

Keywords

Bacillus thuringiensis, Bioassay, Insecticidal Activity, Plutella xylostellu.

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• Field Evaluation of Trichogrammatids for the Control of Helicoverpa armigera (Hubner) on Tomato

Abstract Views :215  |  PDF Views:120

Authors

Parminder Kumar ¹, M. Shenhmar ¹, K. S. Brar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana, 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 18, No 1 (2004), Pagination: 45-50

Abstract

Trichogramma chilonis Ishii, T. pretiosum Riley and T. brasiliense Ashmead were field evaluated at three different dosages (50,000, 75,000 and 100,000/ha)" against Helicoverpa armigera (Hiibner) on tomato. No significant difference was observed in mean egg count in all the treatments. However, significant difference was observed in larval population and lowest mean larval population (0.5 larvae/5 plants) was recorded in T. chilonis @ one lakh/ha dosage. Highest parasitism (41.07%) was recorded where releases of T. chiollis were made @ one lakh/ha, and it was on par with the treatment of 75,000/ha of T. chiollis (40.0()%). Lowest fruit damage (8.01 %) was recorded in treatment where T. chilollis was released @ one lakh/ha, which was followed by the release of T. chilonis @ 75,000/ha (9.20%), one lakh/ha of T. brasiliellse (11.66%), and T. pretiosum @ 1,000,000 and 75,000/ha (10.88 and 11.82%, respectively). Highest (261.07q/ha) yield was form treatment of T. chilonis @ one lakh/ha, followed by T. chilonis 75,000/ha (248.27q/ha).

Keywords

Dosages, Field evaluation, Helicaverpa armigera, Tomato, Trichogrammatids.

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• Role of Trap Crops in Increasing Parasitisation Efficiency of Trichogramma chilonis Ishii in Cotton

Abstract Views :248  |  PDF Views:170

Authors

J. S. Virk ¹, K. S. Brar ¹, A. S. Sohi ¹

Affiliations
1 Punjab Agricultural University, Department of Entomology, Ludhiana 141004, Punjab, IN

Source

Journal of Biological Control, Vol 18, No 1 (2004), Pagination: 61-64

Abstract

The role of trap crops on the parasitisation efficiency of TricllOgramma chilonis was studied at farmer's field at village Khuban (Distt. Ferozepur). Maize, sorghum, pearl millet and marigold were tested as trap crops. One row of trap crop was grown after every 20 rows of cotton crop along with pure crop of cotton. The egg parasitoid was released 13 times during July to September at weekly interval @ 1, 50,000 per hectare. Need based applications of comparatively safe insecticides were also made. The highest mean parasitization (10.48%) was observed when sorghum was used as trap crop and it was significantly higher than all other treatment. The parasitisation when marigold was used as trap crop was also higher (8.08 %) than pure cotton. The mean incidence among green bolls was lowest (2.74 %) when sorghum was used as trap crop and it was significantly lower than other treatments except when marigold (3.52 %) and pearl-millet (3.8 %). The seed cotton yield in pure cotton was lowest (13 q/ha) which was on par with maize (13.1 q/ha) but these were significantly lower than other treatments. The yield was significantly highest (14.8 ql ha) when sorghum was used as trap crop.

Keywords

Bollworms Complex, Cotton, Parasitization, Trap Crop, Trichogramma chilollis.

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• Effect of Different Chickpea Cultivars on Parasitization of Helicoverpa armigera (Hubner) by Campoletis chlorideae Uchida

Abstract Views :207  |  PDF Views:127

Authors

S. Kaur ¹, K. S. Brar ², M. Shehnmar ²

Affiliations
1 Farm Advisory Service Scheme (FASS) (PAU), Roopra Building, Garha Road, Jalandhar 144001, IN
2 Department of Entomo]ogy, Punjab Agricultural University, Ludhiana 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 18, No 1 (2004), Pagination: 69-72

Abstract

The extent of natural parasitism of Helicoverpa armigera (Hubner) by Campoletis chlorideae Uchida on different chickpea cultivars was studied at different locations in Jalandbar district of Punjab. The parasitoid population varied from 0.02-1.S0 cocoons per metre row length and the larval population ranged between 0.86-14.50 larvae per metre row length. The maximum numbers of cocoons were recorded on PBG S (0.88) followed by L SSO (0.74). The H. armigera population was also high on PBG S (9.38 larvae I m row length) followed by L 550 (6.75 larvael Ul row length).

Keywords

Campoletis chlorideae, Cocoons, Helicoverpa armigem, Larval Parasitization.

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• Effect of Varieties/ Hybrids of Cotton on the Parasitization Efficiency of Trichogramma chilonis Ishii

Abstract Views :213  |  PDF Views:101

Authors

J. S. Virk ¹, K. S. Brar ¹, A. S. Sohi ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab, IN

Source

Journal of Biological Control, Vol 18, No 1 (2004), Pagination: 73-76

Abstract

Six cultivars, namely, LD 327, LH 1556, Ganga Kaveri-151, Ankur 651, Dbaval-2 and LHH 144 were e,'aluated for testing efficacy of Trichogramma chilonis Ishii. T. chilonis was released 13 times during July to September at weekly interval @ 1,50,000 per ha. Four sprays of compatible insecticides were given during this period. The lowest bollworm incidence among intact fruiting bodies was recorded in LD327 (1.40%) which was on par with Ankur 651 (2.06%) and LHH144 (2.10%) but significantly lower than other cultivars. There was no significant difference in mean bollworm incidence among green bolls, parasitization, and seed cotton yield in various cultivars.

Keywords

Bollworms Complex, Cotton, Hybrids, Parasitization, Tricllogramma chilonis, Varieties.

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• Biocontrol Based Management of Cotton Bollworms in the Punjab

Abstract Views :243  |  PDF Views:110

Authors

K. S. Brar ¹, B. S. Sekhon ¹, J. Singh ¹, M. Shenhmar ¹, Joginder Singh ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 16, No 2 (2002), Pagination: 121-124

Abstract

Two biocontrol based IPM modules, along with Punjab Agricultural University (PAU) spray schedules were evaluated for the management of cotton bollworms. IPM module II (3 sprays each for sucking pests and cotton bollworm + 8 releases of Trichogramma chilonis @ 1,50,000/ha/week + one release of Chrysoperla carnea @ 10,000/ha) was on par with PAU spray schedule in reducing the bollworm damage and increasing the yield. When T. chilonis (Bathinda strain) was integrated with insecticides it reduced the damage of bollworm by 70.3 percent and gave higher yield by 44.5 percent over insecticides alone.

Keywords

Chrysoperla carnea, Cotton Bollworms, Insecticides, IPM Module, Trichogramma chilonis.

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• Fungal Isolates of Carrot Weed, Parthenium hysterophorus L. from Punjab

Abstract Views :199  |  PDF Views:123

Authors

Neelam Joshi ¹, Maninder Shenhmar ¹, K. S. Brar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana 141004, Punjab, IN

Source

Journal of Biological Control, Vol 15, No 1 (2001), Pagination: 101-102

Abstract

The survey on Parthenium hysterophorus conducted in six districts of Punjab during November, 1999 to January, 2000 revealed three species of fungi, viz. Alternaria alternata, Sclerotium sp. And Aspergillus niger infecting P. hysterophorus.

Keywords

Fungal Isolates, Parthenium hysterophorus.

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• Host Searching Capacity of Laboratory Reared and Field Collected Populations of Trichogramma chilonis Ishii

Abstract Views :214  |  PDF Views:161

Authors

K. S. Brar ¹, S. S. Khosa ², B. S. Sekhon ³

Affiliations
1 Department of Entomology Punjab Agricultural University Ludhiana, 141 004, Punjab, IN
2 Nahar Sugar and Allied Industries, Ltd., Amloh, Fatehgarh Saheb, Punjab, IN
3 Regional Research Station, Bathinda, Punjab, IN

Source

Journal of Biological Control, Vol 14, No 2 (2000), Pagination: 29-33

Abstract

In cotton field Trichogramma chilonis could disperse as far as 9 metres to search its host, but the maximum parasitization was observed up to 2 metres. The performance of the Muktsar population was better than all other populations. The laboratory reared population was significantly inferior to all field collected populations.

Keywords

Cotton, Host Searching Capacity, Populations,Trichogramma chilonis.

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• Effect of Storage on the Emergence and Parasitization Efficiency of Laboratory Reared and Field Collected Populations of trichogramma Chilonis Ishii

Abstract Views :246  |  PDF Views:146

Authors

S. S. Khosa ¹, K. S. Brar ²

Affiliations
1 Nahar Sugar and Allied Industries Ltd. Amloh, Fatehgarh Saheb Punjab, IN
2 Department of Entomology Punjab Agricultural University Ludhiana 141 004, Punjab, IN

Source

Journal of Biological Control, Vol 14, No 2 (2000), Pagination: 71-74

Abstract

The parasitoid, Trichogramma chilonis could be stored in the refrigerator and successfully utilized for 23 days without adversely effecting their emergence and parasitization efficiency. The mean per cent parasitization decreased with the increase in storage period. Among the four populations studied, Muktsar population was most efficient as it showed maximum mean emergence (60.4 %) and mean per cent parasitization (52.1) for 60 days.

Keywords

Emergence, Parasitization, Storage, Trichogramma chilonis.

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• Role Played by Campoietis chlorideae uchida in Natural Mortality of Hejicoverpa armigera (Hubner) on Chickpea in Punjab

Abstract Views :191  | 

Authors

S. Kaur ¹, K. S. Brar ¹, B. S. Sekhon ¹, N. Joshi ¹, M. Shenhmar ¹, J. Singh ¹

Affiliations
1 Department of Entomology, College of Agriculture Punjab Agricultural University, Ludhiana 141004, Punjab, IN

Source

Journal of Biological Control, Vol 14, No 1 (2000), Pagination: 51-54

Abstract

Studies were conducted to assess tbe role of natural mortality factors in Helicoverpa annigera (Hubner) on chickpea in Punjab. The larval parasitoid Campoletis chlorideae Uchida bas been recorded as the most important mortality factor. Parasitism due to C. chlorideae ranged from 0.98 to 68.50 per cent throughout the crop season. The maximum parasitism was recorded during 3rd week of February, 1999 when the minimum mean temperatures and relative humidity were 11.9°C and 95 per cent, respectively. As C.chlorideae helps in suppressing tbe pest population both at vegetative and flowering! pod formation stage or the crop, it suggests that the conservation of C. chlorideae in chickpea is important.

Keywords

Campoletis chlorideae, Chickpea, Helicoverpa armigera, Parasitoid.

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• Biological Control of Mustard Aphid, Lipaphis erysimi (Kaltenbach) in the Punjab

Abstract Views :239  |  PDF Views:122

Authors

Maninder Shenhmar ¹, K. S. Brar ¹

Affiliations
1 Department of Entomology, Punjab Agricultural University, Ludhiana - 141 004, IN

Source

Journal of Biological Control, Vol 9, No 1 (1995), Pagination: 9-12

Abstract

Mustard aphid Lipaphis erysimi (Kaltenbach) is a serious pest of rapeseed and mustard in Punjab. The coccinellids, viz. Coccinella septempunctata Linnaeus and Cheilomenes sexmaculatus. Fabricius were the most common predators of L. erysimi. The studies on the feeding potential indicated that C. septempunctata and C. sexmacuilatus consumed 380.4 and 304.3 aphids respectively during their larval development. Releases of 2nd instar larvae of C. septempunctata and C. sexmaculatus in the mustard freld @ 1000/ha proved effective in reducing mustard aphid population. C. septempunctata proved significantly better than C. sexmaculatus for the control of mustard aphid.

Keywords

Coccinella septempunctata, Cheilomenes sexmaculatus, Lipaphis erysimi, Biological Control.

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• Studies on the Growth Rate of Trichogrammatoidea eldanae Viggiani (Trichogrammatidae: Hymenoptera) Population

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Authors

K. S. Brar ¹, G. C. Varma ¹

Affiliations
1 Department of Entomology, Pubjab Agricultural University, Ludhiana - 141 004, IN

Source

Journal of Biological Control, Vol 3, No 2 (1989), Pagination: 126-127

Abstract

Trichogrammatoidea eldanae Viggiani is an important parasitoid of the sugarcane borer, Eldana saccharina Walker in South Africa (Conlong and Hastings, 1984). It has recently been introudced into India (Anon., 1987) and is being mass multiplied and tested against Chilo auricilius Dudgeon. in the Punjab. The growth rate and population of this parasitoid has not been studied so far. The present studies were, therefore, undertaken to study the growth rate of the parasitoid.

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