STUDIES ON INSECT PESTS OF BITTER GOURD WITH SPECIAL REFERENCE TO CUCUMBER MOTH, Diaphania indica (Saunders) (LEPIDOPTERA: CRAMBIDAE)
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Date
2017-06-30
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UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
Abstract
The investigation on survey, seasonal incidence of insect pests, biology and
management of cucumber moth, Diphania indica (Sunnders) on bitter gourd was carried
out during 2016-17 cropping season at UAS Raichur.
Survey result indicated that fruit fly damage was more during kharif season in all
taluka of Raichur district. Other pests viz., aphid, thrips, whitefly, leaf miner, cucumber
moth and red pumpkin beetle were low. Whereas fruit fly incidence was low during rabi
and other pests were high during rabi.
The seasonal incidence of insect pests on bitter gourd revealed that major insect
pests found during kharif were aphid, whitefly, leaf miner, cucumber moth, red pumpkin
beetle and fruit fly. The maximum activity of fruit fly and cucumber moth were observed
in the month of October and September respectively. Studies on seasonal incidence of
insect pests on bitter gourd revealed that major insect pests found during rabi were aphid,
thrips, whitefly, leaf miner, cucumber moth, red pumpkin beetle and fruit fly. Maximum
activity of cucumber moth during February and fruit fly were Maximum in the month of
March.
Studies on biology of cucumber moth on bitter gourd revealed that, egg and
larval period 3.05 ± 0.25 and 9.50 ± 0.45 days respectively. The pre-oviposition and
oviposition period found to be 1.09 ± 0.15 and 4.35 ± 0.59 days respectively. The
fecundity varied from 220-268 eggs per female. The longevity of adult male and female
was 5.35 ± 0.34 and 8.40 ± 0.39 days respectively.
Among the insecticides evaluated chlorantraniliprole 18.5 SC, flubendiamide 48
SC and spinosad 45 SC were found to be effective against cucumber moth by recordings
lowest larval population. Next superior treatment in order of priority were emamectin
benzoate 5 SG > dichlorvos 76 EC > Azadirachtin 1500 ppm > Bacillus thuringiensis.
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