Jute and Their Management

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Centurion UNIVERSITY INSECT PESTS OF JUTE AND THEIR MANAGEMENT Centurion University ofTechnology and Management Shaping Lives...Empowering Communities... JUTE SEMILOOPER Anomis sabulifera Noctuidae: Lepidoptera APPEARANCE Moth is a medium sized, brownish in colour with dark spots and many lines on forewings Caterpillar is slender, green with dark green stripes and black spots on the body LIFE HISTORY • About 150-200 eggs are laid singly on the lower surface of leaf. • Egg hatches in 2-3 days. • Pupation takes place in the soil in rough cocoons, Some times on leaves, suspended by means of curved hooks of pupa SYMPTOMS OF DAMAGE • In the beginning caterpillar feeds on leaves, as they grow they attack apical buds and top shoots. MANAGEMENT • Larval parasite Tricholiga sorbilans suppresses the pest naturally. • Foliar spary with carbaryl 3 g/l or monocrotophos 1.6 ml/l JUTE STEM WEEVIL Apion corchori Curculionidae: Coleoptera APPEARANCE Adult is a small dull black weevil with a long curved snout Grub is light yellowish in colour with brown head and measures 3 mm in length when full grown. LIFE HISTORY • Eggs are laid singly on the stem near the base of the petiole and on seed pods. • Eggs hatch in 3-5 days in to grubs. • Larval period lasts for 8-18 days • Pupation takes place in a pupal chamber and lasts fro 4 days SYMPTOMS OF DAMAGE • Grubs feed inside the bark and damage the fiber. As a result of injury knots are formed on the stem and branching takes place. MANAGEMENT • Destruction of infested plants. • Dusting methyl parathion 10 – 12 kg/ac as foliar spray @ 2 ml/l JUTE STEM GIRDLER Nupserha bicolor Cerambycidae: Coleoptera • Adult female girdles stem at two levels as a pre ovipositional operation results the stem withering, drooping and finally dying above the level of the lower girdle. • Dusting methyl parathion 2D 10 – 12 kg/ac keeps the pest under control. BIHAR HAIRY CATERPILLAR (Jute) Spilosoma (Diacrisia) obliqua Arctiidae: Lepidoptera • It is a polyphagous pest. Feeds on the tender portion of jute plants and defoliates. • Management for jute semi looper is also recommended against this. .

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RECENT LITERATURE on LEPIDOPTERA (Under the Supervision of PETER F
1960 .loumal of the Lepidopterists' Society 161 RECENT LITERATURE ON LEPIDOPTERA (Under the supervision of PETER F. BELLINGER) F. BIOLOGY AND IMMATURE STAGES Comstock, John Adams, "Notes on metamorphoses of the Giant Skippers (LepidopTera: Megathymimc) and (he life history of an Arizona species." Rull. southern Calif. Acad. Sri., vol.55: pp.19-27, 3 figs. 1956. Describes mature larva & pupa of Mega thymus evalls;. [P B.] Comstock, John Adams, "Notes on the life history of a rare Arizona sphinx moth, Xylophanes faito Walker." Bull. southerll Calif. Acad. Sci., vo1.55: pp.102-106. 5 figs. 1956. Describes mature larva & pupa; foodplant B01lvardia glaberrima. LP.B.] Comstock, John A., "Brief notes on the life histories of two Arizona geometrid moths." Bull. southem Calif. A (ad. Sci., vol. 56 : pp.99-100 1957. Describes larva & pupa of Philobia aspirata (from Black Walnut), & egg & young larva of Pero modest1ls. [P.B.] Com';tock, John Adams, "Life histories of two southern Arizona moths of the genus Caripeta." Bull. southern Calif. Ilrad. Sci., vol. 56 : pp.88-96, 4 pIs. 1957. De£cribes & figures early stages of C. hilumaria (reared on willow, probably not the normal food plant) & C. macularia (reared on oak). [Po B.] Comstock, John Adams, "Notes on the early stages of two western American moths." Bull. southern Calif. Acad. Sci., vol.56: pp.42-47, 6 figs. 1957. Describes mature larva; & pupa; of Cisthene nexa & Agriopodes viridata; both feed on the lichen Ramalina combeoides. [Po B J Comstock, John Adams, "Notes on the metamorphosis of an Agave-boring butterfly from Baja California, Mexico." Trans.
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