Guru GyaanGOI - Ministry of Agriculture & Farmers Welfare
Fall armyworm advisory by the Ministry of Agriculture & Farmers Welfare
Recently, Department of Agriculture, Co-operation & Farmers Welfare, Govt. of India has suggested few steps for the management of steps for Fall Armyworm in Maize.
The invasive pest, fall armyworm could be one of the more difficult insect pests to manage in field Maize. Late sowing fields and late maturing hybrids are more likely to become infested by Fall armyworm. Fall armyworm feeds gregariously on leaf and causes serious damage to cobs of the maize. Hence fall armyworms can damage all stages of maize crop, fall armyworm can only be effectively managed in first instar larval stage only once it enters to the cobs we can’t control the pest. This pest can infest more than 100 crops but in India it founds on Maize (several grain crops, vegetables, and wild plants). Fall Armyworm is native to the tropical and subtropical regions of the Americas, then reported from South-Western Nigeria, later it spread to the Africa. In India, it was first noticed in mid-May 2018 in Shivamogga, Karnataka and later on reported in other states i.e. Telangana, Andhra Pradesh, Maharashtra, Gujarat and Tamil Nadu.
Farmers are advised to take few steps for the management of such a voracious maize cobs feeding in nighttime. In depth, from starting of the season, deep ploughing in summer may expose the pupae to predatory birds and direct sunlight; this will kill the resting stages of the FAW in the soil. Intercropping of maize with suitable pulse crops of particular region (Eg. Maize + Pigeon pea /Black gram /Green gram). To check the pest incidence in the field, Install pheromone traps 5 per acre. Release of Trichogramma pretiosum or Telenomus remus @ 50,000 per acre at weekly intervals or based on trap catch of 3 moths/trap. Application of Metarhizium anisopliae powder formulation @ 75g or Bacillus thuringiensis. var. Kurstaki @ 30 g per 15 litre of water at 15-20 days interval as whorl application.
For effective chemical management, seed should be treated with Cyantraniliprole 19.8% + Thiamethoxam 19.8% @ 4 ml per kg seed. At seedling stage of the plant spray NSKE 5% / Azadirachtin 1500ppm @ 5 ml of water. Later on, during the whorl development stage, spray Emamactin benzoate @) 0.4 g/l of water OR Spinosad @ 0.3 ml/l of water OR Thiamethoxam 12.6% + Lambda cyhalothrin 9.5% @ 0.5 ml/l of water OR Chlorantraniliprole 18.5% SC @ 0.3 ml/l of water. Very later stage it might be very difficult to manage, hence farmers are advised to take necessary action in advance to manage the pest.
Source: GOI - Ministry of Agriculture & Farmers Welfare
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