Seasonal incidence of pod fly (Melanogromyza Obtusa Malloch) and pod bug (Clavigralla Gibbosa Spinola) in short duration pigeon pea
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Abstract
The present study was aimed at observing the incidence pattern of pod fly and pod bug in pigeonpea ecosystem. The experiment was conducted at Agricultural Research Farm, Banaras Hindu University, Varanasi during the kharif season of the year 2010-11.The short duration pigeon pea was infested with the number of insect pests at various stages of crop growth. Out of which the incidence pattern of pod fly M. obtusa and pod bug C. gibbosa was studied. The first appearance of pod fly M. obtusa was noticed in the 42 standard week with a mean population of 0.10 maggot/Plant whose maggot population peaked in 45 standard weeks with a mean population of 0.30 maggot/Plant during year 2010-11. Similarly the first occurrence of pod bug C. gibbosa was recorded in 40 standard weeks with a mean population of 0.03 larvae/Plant which attained the peak during 44 and 45 standard weeks, in both the week themean population was 0.40 larvae/Plant. The incidence of all the insect pests although declined after attainment of their respective peak, but pod bug were noticed in the field till the harvest of the crop. To undertake an effective IPM strategy in pigeonpea crop, location specific information on occurrence and seasonal dynamics of insect pests is indispensible.
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Pigeon pea, Pod fly, Pod bug, Seasonal incidence
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