Rice leafhopper
Scientific name Susumia exigua (Butler) Lepidoptera, Acrididae. Alias ​​hair brush must be wild. The distribution ranges from Liaoning in the north to Hainan, Guangdong, Guangxi, and Yunnan in the south. Sichuan has the highest density, sometimes more than rice leaf roller. It is an approximate species of rice leaf roller.
Host rice, upland rice.
The characteristics of damage with rice leaf roller. The larvae spun silk and rolled the rice leaves from both sides of the edge to the center, concealed the feeding of the leaves and left white net veins, causing the plants to die.
Morphological characteristics Adult body length 6-7mm, wingspan 14-15mm, front and rear wing brown and brown broadband. The chest is dark, the back of the abdomen is white, and the end has dark spots. The forewings are yellow-brown in color with 3 stripes. The horizontal lines are connected to the outer edge of the brown belt. The front edge also has brown bands. The rear wings have 2 gray and black horizontal lines. Egg pale yellow i, flat, oval, about 1mm. The last instar larvae have a body length of 14-18 mm, a small head, and a slender body. The whole of the larvae are slightly rosary-like, yellow-green, and slightly orange at both ends. The dragonfly is 6-8mm long, yellow-brown. The adult worm was slightly smaller than the rice leaf roller, and the three horizontal lines of the forewing wing all reached the wing edge. The center of the egg is not raised and slightly sunken. 4-5 years old
The larvae are all slightly beaded, yellow-green. The abdominal abdomen has smooth back, no wrinkles, and no bristles or protrusions. Different from rice leaf roller.
Life habits are marked by vertical leafhoppers in Guangxi in 3 generations, and in the south of Sichuan in 4 to 5 generations. 3-4 years of instar larvae in the field of wheat fields, millet fields or green manure fields, leisure fields outside the piles of leaf sheath sheath and rod, renewable rice seedlings and ditch edge, pond side grasses in winter, the end of April the following year Began to go. From May to June, the first generation of adults emerged. The second generation of adults emerged in July and the third generation of adult emergence occurred from August to September. Adults get out day and night, there is a strong phototaxis. Hi laid eggs on the back of rice leaves, more than 10 per leaf, the third generation of larvae is harmful.
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