Embed Size (px)
Citation preview
THE CITRUS INSECTS
1-Citrus leaf caterpiller.2- Mealy bug. 3- Black citrus aphid. 4-oriental yellow scale.
5-Brown soft scale .
Citrus leaf caterpillerPapilio demoleusPapilionidae:LepidopteraThe adult: Nice in colour,the wings are black &have yellow
spots. The female is larger than the male .
The larvae: when it hatches is dark in colour and it become
green .30 ml in length in the last stage.
Host :citrus trees , and some vegetables.
The damage:the damaging result from feeding of larvae on leaves that leads to decrease in the crop.
MEALY BUG PSEUDOCOCCIDAE:HOMOPTERA
Nipaecoccus vastator
:Adult colour . The female Oval in shape .dark brown inThe body segmented in to clear segment .wingless All the body coverd by waxes material2-3ml.
The male Reddish brown in colour ,Winged (1ml in length).Nymph:Have 4 stages ,yellow in colour.Host :(citrus ,apple,Grape).
Nipacoccus vastator
الدقيقي البق
Damage-:
The damage is caused by the feeding of the nymphs and the adults when sucking the sap of leaves & fruits,which becomes yellow, agregation of dust that deternt the photosynthesis.
Black citrus AphidToxoptera aurAantii
Aphidae:Homoptera Adults:
Large insect(2ml in length),dark green in colour.Host : Citrus trees.
Damage : Infested new growth in citrus trees in the first of spring and the infestation increases during the May.
Toxoptera aurantii
Oriental yellow scale A onidiella orientalis
Diaspididae: HomopteraThe body coverd by yellow waxes cortex.this cortex is circle in female and oval shape in male.
Host: Citrus trees – olive -apple .Damage
The nymph and adults sucks the sap of leaf that leads to general weak of trees and to become
yellow.
Aonidiella orientalis
Brow soft scale Coccus hesperidum Coccidae:Homoptera
The female is flattened ,green yellowish ,the edge of body becomes reticulum in shape .
Host: Infested the branches ,leaves of Citrus & Grape.
Damage: The nymph and adult suck the sap of plant .
Coccus hesperridum
