MANAGEMENT OF INSECT PESTS OF RICE THROUGH ECO-FRIENDLY APPROACH
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Date
2017
Authors
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Publisher
Birsa Agricultural University, Ranchi, Jharkhand-6
Abstract
Rice is one of the most important staple foods of India including the state
of Jharkhand. The crop is usually badly affected by half of a dozen of major
insect pests .Use of chemical insecticides is one of the most effective tool of pest
management but it’s injudicious usage has too many side effects. So use of eco–
friendly and neem based tools of IPM namely HPR, suitable adjustment in dates
of planting and use of eco-friendly insecticides is a need of present time for
sustainable management of pests without harming the environment and
ecosystem. Keeping all these facts in view the present investigation was
undertaken. Out of 16 prevailing insect pest species in rice ecosystem, five of
them occurred as major pest’s viz. YSB, hispa, leaf folder, GLH and ear bug.
The rice varieties viz., Kavya, Suraksha, IR-36, and BG-380-2 remained
resistant to the five major insect pests, resulting in higher yield of 38.70, 35.80,
26.70and 42.80 q/ha respectively, even when they were grown in the
unprotected condition. TN-1, Pusa Basmati -1, IR-64,Swarna and Birsa mati
exhibited susceptibility to the pests resulting in lower yield of 16.38 , 42.50,
38.50,40.50, and 44.50 q/ha respectively . Minimum incidence of major pests
namely – YSB, hispa , GLH and gundhi bug was observed when the crop was
transplanted at the earliest (i.e. on 1st of July , 15) whereas maximum incidence
of gundhi bug was found when the transplantation of the crop was delayed.
Highest yield was also found when the crop was transplanted at the earliest.
Need based foliar sprays with neem based insecticides applied at 25, 35, 50, 80
and 115 days after transplanting (DAT) proved to be highly effective against
prevailing major insect pest. Monocrotophos being the most effective in this
regard resulting in the highest yield when compared to 11 neem based
insecticides, Achook, Neemark, and NSKE-5% proved more effective in reducing
the incidence of the major insect pests. As such, integration of various IPM tools
i.e., HPR (i.e. resistant varieties) coupled with early planting of the crop, need
based and judicious application of the neem formulations could be highly
effective component (tool) as an integral part of IPM/ICM for sustainable rice
production.
Description
MANAGEMENT OF INSECT PESTS OF RICE THROUGH ECO-FRIENDLY APPROACH
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