Field screening of different rice entries against different insect-pests of rice during kharif season

The different rice entries were screened out against stem borer, leaf folder and whorl maggot of rice during kharif, 2014 at Rice Research Station, Chinsurah, Hooghly, West Bengal. The experiment was carried out to note the reaction of promising advanced cultures with four check varieties viz. DRRH 2, Surakha, IR 64 and Taichung Native 1 (TN 1) against insect-pests of rice with a view to identify multiple resistant varieties. The lowest dead heart infestation was recorded in RP 5163-200-5-4-2 (0.70%) followed by RNT 14-1-1-2-2 (0.83%), IR 64 (0.49%) and RP 5588-B-B-B-B-76 (1.08%). Lowest white heads was observed in CR 1898-32-69-CN-12-2 (0.90%) followed by RP Bio 4918-142 (1.45%) and RP 2068-18-3-5 (1.60%). The lowest leaf folder infestation was noticed in RP 5588 (0.57%) followed by DRRH 2 (0.76%), CR 2274-2-3-3-1 (0.88%) and RP 5588-B-B-B-B-116 (0.93%). The minimum whorl maggot incidence was observed in RP 5587-B-B-B-267-1 (4.78%) followed by RP 5588-B-B-B-B-76 (5.09%), RP 5588-B-B-B-258-1 (5.16%) and RP 5588-B-B-B-133 (5.29%) entries. This experiment resulted that CN 2008-3-2, CN 2017-3-2 and W1263 are the multiple resistant entries against all the test insect-pests, CR 2274-2-3-3-1, RP 5587-B-B-B-305-13, CN 2015-5-4, IET 23148 and CN 1233-33-9 against stem borer and leaf folder and RP 2068-18-3-5, RP 5588-B-B-B-B-76 and RNT 14-1-1-2-2 against stem borer and whorl maggot.

• CN 2008-3-2, CN 2017-3-2, W 1263-stem borer, leaf folder, whorl maggot

• CR 2274-2-3-3-1, RP 5587-B-B-B-305-13, CN 2015-5-4, IET 23148, CN 1233-33-9-stem borer, leaf folder

• RP 2068-18-3-5, RP 5588-B-B-B-B-76, RNT 14-1-1-2-2-stem borer, whorl maggot