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
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 %