A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
RAGHUNANDAN, B. L.
- Bio-Efficacy of Different Biological Control Agents for the Management of Chilli Fruit Rot/Anthracnose Disease
Authors
1 AICRP on Biological Control of Crop Pests, Anand Agricultural University, Anand - 388 110, Gujarat, IN
Source
Journal of Biological Control, Vol 33, No 2 (2019), Pagination: 163-168Abstract
Chilli (Capsicum annum L.) an important economic crop worldwide is severely infected by fruit rot disease which may cause yield losses of up to 100%. Although different chemical fungicides are being recommended and used for the management of the disease, biocontrol-based strategy attracts considerable attention and offers great potential of novel biocontrol agents. Further, biological control methods for chilli fruit rot/anthracnose disease have not received much attention. Therefore, an investigation was carried out to assess the efficacy of different biological control agents against chilli fruit rot/anthracnose disease. Antagonistic yeast isolates Pichia guillermondii (Y-12), Hanseniaspora uvarum (Y-73) and Trichoderma asperellum (Th-3), Pseudomonas fluorescens (Pf-1) were tested through seed treatment, seedling dip and foliar spray at concentration of 2 × 108 cfu/g. The pathogens viz., Colletotrichum capsici, Alternaria alternata and Periconia byssoides were found associated with fruit rot during the study. Lowest mean disease intensity (MDI), highest disease control (DC) over untreated control was recorded in the treatment <i>P. guillermondii</i> (Y-12) (5.39% MDI, 64.72% DC) and this was found at par with the treatment <i>P. fluorescens</i> (Pf-1) (5.92% MDI, 65.52% DC). However, <i>T. asperellum</i> (Th-3) showed satisfactory results. The present study highlights the efficacy of antagonistic yeast species against chilli fruit rot pathogens and these findings serve as base for further exploration and exploitation of yeast species for eco-friendly management of crop diseases.
Keywords
Biological Control, Chilli Fruit Rot, Colletotrichum, Pichia guillermondiiFull Text
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- Bio-efficacy of different biocontrol agents against shoot and fruit borer, Earias vittella (Fabricius) (Lepidoptera: Noctuidae) in okra
Authors
1 AICRP on Biological Control of Crop Pests, Anand Agricultural University, Anand, Gujarat, IN
2 ICAR-National Bureau of Agricultural Insect Resources, Bengaluru - 560024, Karnataka, IN
Source
Journal of Biological Control, Vol 35, No 3 (2021), Pagination: 196-204Abstract
Experiments were conducted to evaluate the efficacy of different biocontrol agents against shoot and fruit borer, Earias vittella (Fabricius) infesting okra at Biological Control farm, Anand Agricultural University, Anand (Gujarat) during two successive years, kharif, 2018 and 2019. Among the different biocontrol agents evaluated, the plots sprayed with Bacillus thuringiensis @ 5 g/litre for three times at fortnightly interval witnessed lowest larval population (0.52 larva(e)/plant) and fruit damage (7.00%-number basis, 8.09%-weight basis). The treatment comprising six releases of egg parasitoid Trichogramma chilonis @ 50,000 parasitoids/ha was found next effective treatment with lower larval population (0.67larva(e)/plant) and fruit damage (8.19%-number basis, 9.97%-weight basis). This bio-efficacy of egg parasitoid T. chilonis was statistically at par with the efficacy of treatments viz., Neem Seed Kernel Extract (NSKE) @ 5% and Beauveria bassiana@ 5 g/litre. The highest fruit yield was documented in the treatment B. thuringiensis @ 5 g/litre (111.02 q/ha, CB ratio 1:2.79) followed by the treatments T. chilonis @ 50,000 parasitoids/ha (105.10 q/ha, CB ratio 1:2.77) and NSKE @ 5% (104.64 q/ha, CB ratio 1:2.76). The significant findings of this study could be used to frame BIPM strategy for the management of shoot and fruit borer, E. vittella in okra.
Keywords
Bacillus thuringiensis, biocontrol agents, okra, shoot and fruit borer, Trichogrmma chilonisFull Text
- Survey and surveillance of fall armyworm, Spodoptera frugiperda (J. E. Smith) and its associated natural enemies (Lepidoptera: Noctuidae) in maize in Anand district of Gujarat .
Authors
1 Department of Agricultural Entomology, N. M. College of Agriculture, NAU, Navsari – 396450, Gujarat, India ., IN
2 Department of Agricultural Entomology, BA College of Agriculture, Anand Agricultural University, Anand – 388110, Gujarat, India ., IN
3 AICRP on Biological Control of Crop Pests, Anand Agricultural University, Anand – 388110, Gujarat, India ., IN
Source
Journal of Biological Control, Vol 35, No 4 (2021), Pagination: 234 - 246Abstract
Field surveys were conducted during kharif, 2019 and rabi, 2019-20 to document the fall armyworm (FAW) incidence and damage in maize fields of Anand district of Gujarat. The highest pest incidence and damage was recorded in maize fields of Khambhat taluka of Anand district during the study, while the lowest pest incidence and damage was recorded in Tarapur taluka. During kharif season, the highest pest incidence and damage was recorded in August month and during rabi season, the highest incidence of FAW and its damage in various maize fields was observed in November. It was noticed that the pest incidence was high in kharif season compared to rabi season. The significant differences were noticed with regard to FAW larval population and plant damage levels between the two seasons of the study. During the survey, the natural enemies of FAW viz., Chelonus sp., Coccinellids, Forficula sp., Eocanthecona sp., Cosmolestes sp., Spider (Oxyopes sp.) and Geocoris sp. were recorded. Similarly, Bacillus thuringiensis, Metarhizium (Nomuraea) rileyi and Nucleo Ployhedrosis Virus (NPV) infected FAW larvae were also noticed.Keywords
Fall armyworm, Gujarat, natural enemies, Spodoptera frugiperda .Full Text
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