Integrated management of foliar diseases and thrips in onion seed

Abstract:

Stemphylium blight and thrips are the common problem in onion that affects
the yield reduction in the Maharashtra region of India. So, the field trials were
conducted on onion variety Agrifound Light Red during rabi 2017-18, 2018-19,
and 2019-20 at Regional Research Station, NHRDF, Nashik, Maharashtra, for
management of foliar diseases and thrips in onion seed crop through an integrated
approach. The combined data of last three years trial revealed that soil application
of Trichoderma viride + Pseudomonas fluorescens @ 5.0 kg/ha each at the time of
bulb planting followed by combined and sequential spray of Fipronil @
1ml/L+Chlorothalonil @ 2g/L at 45 days after planting, Carbosulphan
2ml/L+Propineb @2g/L at 60 DAP, Profenofos @ 1 ml/L+Mancozeb @ 2.5g/L at
75 DAP and Cypermethrin 1 ml/L+Carbendazim @ 1g/L at 90 DAP performed
superior for integrated management in onion seed crop with lowest stemphylium
blight intensity (7.29%), thrips population (31.11 nymphs/plant) and highest seed
yield (8.81 q/ha).