Biology and natural control of mulberry leaf roller, Diaphania pulverulentalis (Hampson)
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Date
2022-10
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Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu
Abstract
The incidence of various insect pests affects both quality as well as the quantity of mulberry leaves which in turn has a direct bearing on the quality of silk produced by the mulberry silkworm. In the plethora of different insect pests affecting mulberry leaves, mulberry leaf roller, Diaphania pulverulentalis (Hampson) is a serious one. In line with this, the present investigation entitled “Biology and natural control of mulberry leaf roller, Diaphania pulverulentalis (Hampson)” was conducted in the laboratory of Division of Sericulture as well as in mulberry field, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Chatha during year 2021-2022, for evaluating both lifecycle and natural enemies of this pest. Larvae were collected from mulberry field and were reared under ambient conditions. The results showed that pest undergoes complete metamorphosis with total development period of 28.65 days. The duration of different stages viz., egg, larva, pre-pupa, pupa, adult male and female was found 4.2, 10.06, 2.48, 9.06, 6.02 and 8.08 days, respectively. Average fecundity was found 367.33 ± 9.71 with sex ratio of 1:1.2. A total of ten predators and four parasitoids were found to attack D. pulverulentalis. Six species of predators were from order Araneae (Cheiracanthium sp., Neoscona sp., Telamonia sp., Philodromus sp., Oxyopes sp. and Tetragnatha sp.), two species from Coleoptera (Illeis sp. and Cheilomenes sexmaculata), one Calosoma sp. from family Carabidae and one Mantis sp. Four hymenopteran parasitoids including three braconids (Schoenlandella diaphaniae Marsh, Habrobracon hebetor Say and Phanerotoma sp.) and one Elasmus sp. belonging to family Eulophidae were also found parasitizing the larvae. The results of present investigation give an insight into the biology and natural enemies of D. pulverulentalis, which could prove beneficial in formulation of integrated management practices.
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Preferred for your work. Afreen, S. 2022. BIOLOGY AND NATURAL CONTROL OF MULBERRY LEAF ROLLER, Diaphaniapulverulentalis (HAMPSON) M.Sc.. Sher-e-Kashmir University of Agricultural Sciences and Technology, Jammu-India