1) corn 2) tobacco 3) sugarcane

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Presentation transcript:

1) corn 2) tobacco 3) sugarcane PESTS OF FIELD CROPS 1) corn 2) tobacco 3) sugarcane

CORN

Ostrinia furnacalis (CORN) Lepidoptera: Pyralidae stemborer

Damage: Larva start by chewing holes in the leaves (best time to control) Then go into stem or stalk (drill hole) (difficult to control) Leaf with holes(outside), cut nutrient flow (once inside), stem weakening, collapse, the corn bud undevelop Control: 1) Intercropping: (sweet potatoe & legumes) 2) Light trap, catch adults 3) crop rotation 4) plant flowering plant: attract parasitoid wasps: Trichogramma spp. (parasitize eggs) 5) insecticide: dibrom and gusathion, permethrin, carbaryl

TOBACCO

Helicoverpa armigera (TOBACCO) Lepidotera: Noctuidae Ulat kuntum (budworm)/damage: larva Leaf eater, preferable young shoots Control: use Bt

Spodoptera litura Lepidoptera:Noctuidae Ulas ratus/armyworm ,damage: larva

voracious feeders eating large pieces out of the leaves nocturnal feeders Control: during outbreak, insecticide application at dusk (senja). Insecticides 1) Dipterex 2) Dibrom

SUGARCANE

Saccharicoccus sacchari Homoptera:Pesuducoccidae Koya tebu/pink sugarcane mealybug Adult & nymph sucking the sap of sugarcane Vector for virus: Surgarcane Bacilliform Virus Insufficient chlorophyll, leaves turn yellowish or pale white Control: destroy the infected sheath If serius, spray 0.03% a.i. Monocrotophos, Dimethoate,

Chilo sacchariphagus Lepidoptera:Pyralidae Stemborer Larva drills the stem Control: endosulfan 0.1 % Use Egg parasitoid Trichogramma chilonis