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Lecture 2
This document contains information about 5 different citrus pests: Citrus leaf caterpillar, Nipaecoccus vastator, Black citrus aphid, Oriental yellow scale, and Brown soft scale. For each pest, it provides details on appearance, host plants, and type of damage caused by feeding of the larvae/nymphs and adults. The pests can lead to decreased crop yields by feeding on and sucking sap from the leaves, fruits, and other parts of citrus and other host plants.
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Lecture 2
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- 3. Citrus leaf caterpiller Papiliodemoleus Papilionidae:Lepidoptera The 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.
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- 5. Nipaecoccus vastator Adult colour .Thefemale Oval in shape .dark brown in The 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).
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- 7. Damage :- The damageis 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.
- 8. Black citrus Aphid ToxopteraaurAantii 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.
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- 10. Oriental yellow scale Aonidiella orientalis Diaspididae: Homoptera The 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.
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- 13. Brow soft scale Coccushesperidum 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.
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