Rice pests

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Rice Insect Pests

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> 800 world ; >300 India ; 28 in Karnataka Thrips Rice green leafhoppers Yellow stem borer Case worm Rice leaf folders Brown planthopper (BPH) Rice ear-head bug Rice hispa Asian rice gall midge Major insect pests of rice Yield loss 10-15%

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Rice area and productivity Region Area (M.’ha) Production ( MT) World 153.90 618.0 India 44.30 132.013 Karnataka 1.598 3.80 India ranks first in Area but 15 th in Productivity(3.01 t/ha) China :29.3 M.ha Productivity:6.26t/ha

Reasons for sever pest incidence : 

Reasons for sever pest incidence Planting same varieties over intensive area Growing susceptible varieties Cultivating rice round the year High doses of Nitrogen Indiscriminate use of insecticides

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Stenchaetothrips biformis

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N.virescens N.nigropictus

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Yellow stemborer: Scirpophaga incertulas

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Mass trapping

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Caseworm : Paraponyx stagnalis (Nymphula depunctalis )

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Leaf roller Cnaphalocrocis medinalis

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Hispa: Dicladispa armigera

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Horned caterpillar : Melanitis leda ismene

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Gall midge : Orseolia oryzae

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Brown planthopper : Nilaparvata lugens

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White BPH : Sogatella furcifera

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Root knot nematode