Citrus pest introduction

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Citrus pests There are a wide variety of citrus pests, citrus rust ticks, fruit sucking tobacco moths, cockroaches, leaf roller moths, etc., which are harmful to fruit, and citrus fruit flies are quarantine pests of citrus fruits.

(1) Phyllocoptes oleivorus Ash Also known as rust, Phyllocoptes oleivorus Ash only harms citrus plants. Citrus, orange, and lemon are the most severely affected, while grapefruit and kumquat suffer less.

The nymphs and adults puncture the skin to suck juice. In severe cases, the fruit surface is tarnished and covered in dust (shellworm body). The skin is dark reddish-brown to dark brown, commonly known as "gray copper", "red copper", and "black". "Copper", hardened peel, corked, many criss-cross cracks appear brown after oxidation. The texture of the pulp is rough, the sugar content decreases, the flavor becomes acid, and it is perishable during storage.

(2) The leaf roller moths harmful to citrus fruits of Citrus reticulata are mainly P. sibirica and C. elegans, which belong to Lepidoptera. In addition to harming citrus, citrus leaf roller moth also harms litchi and longan.

The larvae break into the fruit and the fruit is easily infected with rot from the pods during storage.

(3) Tetradacus citri (chen) is a devastating pest of citrus, an important international quarantine subject. Citrus bigbill only harms citrus fruits, and sweet orange suffers the most.

Adults lay their eggs in the fruit and showed a papillary bulge around the spawning hole in the orange, lime, and red tangerine peel. The appearance of unripe first yellow and red yellow appeared in the periphery. On the grapefruit, the common oviposition hole is dark brown. If there are few internal worms, the fruit can grow normally but perishable in the later period and the pulp is mushy.

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