Crop habitat diversification, planting time and plant geometry for management of chilli pests
KrishiKosh
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Title |
Crop habitat diversification, planting time and plant geometry for management of chilli pests
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Creator |
Sujay Hurali
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Contributor |
R. S. Giraddi
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Subject |
Agricultural Entamology
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Description |
Investigations on effect of different cropping systems, planting time and planting geometry; influence of different genotypes on chilli pests and evaluation of new molecules and their effect on natural enemies were carried out during 2008-09 and 2009-10 at the Main Agricultural Research Station, UAS, Dharwad. Lowest incidence of sucking pests, leaf curl index, larval population of Helicoverpa armigera (Hub.) fruit damage with higher yield and net returns were obtained from different cropping systems when compared to sole chilli. The coccinellids and chrysopids were found in large numbers in different cropping systems (intercropping, trap cropping and border/ barrier cropping). Significantly lower level of sucking pest, leaf curl index, larval population of H. armigera and fruit damage was observed in the crop with July 15th planting and 90x60 cm spacing. The interaction effect among date of planting and different spacing was significant. Dry chilli yield was significantly highest with July 15th planting and 90x60 cm spacing (4.21 q/ha) followed by July 30th and 90x60 cm (4.09 q/ha) and July 15th and 75x45 cm (3.81 q/ha). Similar pattern of treatment significance was observed in case of predator population also. The cultivars viz., Sarpan hybrid, Tejashwini and Sankeshwar recorded relatively lower sucking pest population, leaf curl index, larval population of H. armigera and fruit damage when compared to popular varieties viz., Byadagi kaddi and Byadagi dabbi which exhibited these phonological characters at lower levels. Thiamethoxam 25WG @ 1 g/l, abamectin 1.8EC @ 0.5 ml/l, diafenthiuron 50 WP @ 0.75 g/l were found highly effective against sucking pests. Against H. armigera, novaluron 10 EC @ 0.75 ml/l, emamectin benzoate 5SG @ 0.4 g/l and spinosad 45SC @ 0.3 ml/l were found quite promising. Significantly highest yield (4.65 q/ha) recorded in diafenthiuron 50 WP @ 0.75 g/l with higher net returns (Rs 22,661/ ha). |
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Date |
2016-07-26T11:19:36Z
2016-07-26T11:19:36Z 2013 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/69883
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Format |
application/pdf
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Publisher |
UAS Dharwad
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