Vol. 9 (4) : July-August 2018 issue
Green Farming Vol. 9 (4) : 693-697 ; July-August, 2018
Mitigation of key sucking insect pests infesting okra by novel molecules and their subsequent effects on coccinellid predators
PRANAY RAI1* and P.K. SARKAR2
Deptt. of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur - 741 252 Nadia (West Bengal)
Designation : 1Assistant Professor *(pranayraibckv@gmail.com), 2Professor (Retd.)
Subject : Entomology
Paper No. : P-7322
Total Pages : 5
Received : 21 June 2018
Revised accepted : 18 July 2018
Get Access
Citation :
PRANAY RAI and P.K. SARKAR. 2018. Mitigation of key sucking insect pests infesting okra by novel molecules and their subsequent effects on coccinellid predators. Green Farming Vol. 9 (4) : 693-697 ; July-August, 2018
ABSTRACT
Some new molecules with novel mode of action were evaluated for efficacy against Amrasca bigutulla bigutulla (Ishida), Aphis gossypii (Glover), Bemesia tabaci (Gennadias) infesting okra at Kalyani, West Bengal during the rabi season of 2014. All the treatments were effective in reducing the population of the target pests to varying degrees. Highest % reduction in the population of jassids were recorded in T4- imidacloprid 17.8 SL @ 25 g a.i./ha (58.16) followed by T2- buprofezin 25 % SC @ 200 g a.i./ha (58.03) and T3- emamectin benzoate 5 % SG @ 10 g a.i./ha (55.11) whereas that for aphid was recorded in T3 (72.74) followed by T4 (71.12) and T2 (70.35). Similarly, T4 successfully recorded the highest % reduction (71.36) in population of whiteflies followed by T3 (48.59) and T6 (44.60). T3 was found to be a relatively safer molecule recording the least % reduction (31.94) in coccinellid population followed by T2 (43.05) as compared to T4 (62.03) and T6 (58.79). Subsequently, the highest % increase in yield over control was also recorded in T4 (53.61%) and T3 (52.34%).
Key words :
Amrasca bigutulla bigutulla, Aphis gossypii, Bemesia tabaci, Coccinellid predators, Novel molecules, Okra.
