Seasonal abundance of rice caseworm and whorl maggot under mid hill conditions of Himachal Pradesh, India
Neeru Dumra and Ajai Srivastava
Studies were conducted to record the abundance of arthropod insect pests in rice fields as influenced by rice growth stages and neighboring crops at the experimental farm of paddy in Rice and Wheat Research Centre, Malan during kharif 2017. Rice caseworm and whorl maggot larvae started appearing during 2nd week of July and rice caseworm reached the peak population during 1th week of August with 29 larvae/ 100 leaves. Adult population of rice caseworm initiated first in 2nd week of July (28 SW) as recorded through light trap and were intercepted through sweep net in the third week of July (29 SW). The pest remained active till 38 SW (4th week of September, 2017) and the adult catches of rice caseworm was at its peak during 32 SW (2nd week of August) and adult population of rice whorl maggot observed first in 3rd week of July (29 SW) as recorded through light trap and were intercepted through sweep net in the third week of July (29 SW). Adult catches of rice whorl maggot was at its peak during 34 SW (4th week of August).