A field study conducted to evaluate the efficacy of new molecules against okra shoot and fruit borer, Earias vitella (Fb.) during rabi and summer season revealed that Chlorantraniliprole 8.8% + Thiamethoxam17.5% SC @ 0.7 ml/l significantly reduced the percentage of shoot and fruit damage. No shoot and fruit infestation was recorded at seven and fourteen days after treatment. It was on par with the standard check Chlorantraniliprole 18.5 SC @ 0.3 ml/l followed by Novaluron 10 EC @ 2 ml/l and Lamdacyhalothrin 4.6% + Chlorantraniliprole 9.3% ZC. Chlorantraniliprole 8.8% + Thiamethoxam17.5% SC treated plots recorded highest total yield of 469.86 and 594.31 g/plant respectively. Maximum marketable yield was also recorded from Chlorantraniliprole 8.8% + Thiamethoxam17.5% SC treated plots respectively. Chlorantraniliprole 8.8% + Thiamethoxam17.5% SC also showed high benefit-cost ratio of 2.42 and 3.12 during rabi and summer season respectively.
Behavioural studies on the legume spotted pod borer, Maruca vitrata was done at 27±2oC, 65-70% RH and photoperiod of 12L: 12D. Adult emergence occurred throughout the day. Emergence of moths during scotophase (6 pm - 5 am) was 70%, which constitutes 63% of males and 76% of females. During photophase, (6 am - 5 pm) emergence was 30%, which constitutes 36% for males, and 24% for females. Highest emergence peak for male was observed at 4 pm (photophase) and for females, at 10 pm (scotophase). Calling behaviour of M.vitrata females observed from one to eight days. Female started calling from 2nd hour of scotophase (7 pm) and terminated at 3 am (scotophase). The mean percentage of calling was maximum at 6th hour of scotophase in 3-day old moth with 44%. None of the females called during first hours of scotophase. Mating of M. vitrata observed throughout scotophase up to 8 days and highest mating occurred in 3-day-old moths with 26%.
Six species of genus Athesapeuta Faust (Coleoptera: Curculionidae: Baridinae) from India and the adjacent countries are included, of which three new species, namley meghalayensis sp. nov., richardi sp. nov., and spinulatus sp. nov., are described. An annotated checklist of known species along with their synonymy and distribution is given. Descriptions are supplemented with details of genitalia and elytral vestiture; a key to the species studied is provided.
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