উত্তর সমূহ

  1. সৈয়দা সিফাত জাহান, উপজেলা কৃষি অফিসার, কালীগঞ্জ, লালমনিরহাট

    Cultural Control # The crop sown before 20th October escape the damage. # Apply recommended dose of fertilizers. Mechanical Control # Destroy the affected parts along with aphid population in the initial stage. Biological Control # Ladybird beetles viz., Cocciniella septempunctata, , Hippodamia variegata and cheilomones vicina are most effcient pradators of the mustard aphid. Adult beetle may feed an average of 10 to 15 adults/day. # Several species of syrphid fly i.e., Sphaerophoria spp., Eristallis spp., Metasyrphis spp., Xanthogramma spp and Syrphus spp. are predating on aphids. # The lacewing, Chrysoperla carnea predates on the mustard aphid colony. Chemical Control # Spraying should be done at ETL level. # Spraying should be done in evening time. # Spray the crop with one of the following insecticides in the aphid appearance; Imidacloprid 17.8% @ 0.25 ml/l,Thiamethoxam 25 WG @ o.2g/l, Dimethoate 30EC @ 1 ml/l of water