STUDIES ON INSECT PESTS OF ORIENTAL PICKLING MELON, Cucumis melo L. var. conomon
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Date
2016-09
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University of Horticultural Sciences, Bagalkot
Abstract
An experiment entitled “Studies on insect pests of oriental pickling melon,
[Cucumis melo (L.) var. conomon]” was conducted during 2015-16 at the College of
Horticulture, Bagalkot.
The study revealed occurrence of 24 insect pests and 9 natural enemies in the
oriental pickling melon ecosystem. Among them, thirteen were defoliators, three tissue
feeders and eight sap feeders and a species each of dragonfly, preying mantid, assassin
bug, three species of lady bird beetles, two spiders and a parasitoid were the natural
enemies.
Theeffect of weather parameters on pest population was studied. The maximum
and minimum temperature had positive correlation with population of leaf miner, thrips
and fruit fly but had negative correlation with number of beetles. The relative humidity
and rainfall showed negative correlation with leaf miner and thrips and positive
correlation with beetles. The relative humidity was found to be negatively correlated
with the number of fruit fly catches.
In this study involving 24 genotypes of oriental pickling melon, the low level of
leaf miner infestation was recorded in the genotypes, BCMCO-02, GR-1-1, Sirsi Local,
BCMSO-03 and BCMR-01. While, GR-2-1, GR-3 and Thirthalli local recorded lower
beetle infestation. The genotypes, Sirsi Local, Thirthalli Local, BCMCO-02, Sirsi-1-13
and Koppa local recorded lesser thrips infestation. The lowest per cent fruit infestation
was recorded in the genotypes Sirsi local and BCMCO-02 compared to other genotypes.
Among the insecticides evaluated, deltamethrin, azadirachtin, Neem seed kernel
extract (NSKE), indoxacarb and spinosad were effective against the major pests.
Treatment with deltamethrin, panchagavya, emamectin benzoate, indoxacarb, NSKE,
spinosad and azadirachtinrecorded significantly higher yields per hectare. However, BC
ratio was highest from the plots treated with deltamethrin, NSKE and emamectin
benzoate proving better returns.
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