The scientific name Cavelierius saccharivorus (Okajima) is a hemiptera, a family of long-headed pheasants. Alias ​​sugarcane is different from the long back. Distributed in Zhejiang, Jiangxi, Sichuan, Taiwan, Fujian, Guangdong and other provinces.
The host mainly damages sugarcane, royal grasshoppers, and also damages grasses such as reeds.
Injury characteristics, nymphs sucking leaf sheath, leaf sap, when the amount of production is large, that is, more than a hundred strains of insect heads, resulting in the growth and development of the affected cane seedlings stagnation, dead leaves.
Morphological characteristics Adult females 7.5-8.5mm long, male 6.5-7.3mm, black body, flat Tube, the body is yellow fine hair, the tip of the eye, compound eyes brownish black, single eye small. Antennae 4 knots. The prosthodontic plate is 1.76mm wide and flat. The forewings are short, yellowish, with dark spots and 4 longitudinal veins on the diaphragm. Red brown foot. The egg is about 1.2mm long, bright red, a few yellow-white, rod-shaped. The last instar nymph is about 6.4mm long, long and wide, long, rod-shaped and light brown. The head, the thoracodorsal plate, the forewing buds are black, the antennae are 4 knots, and the compound eye is red. Body back with three white spots, located in the middle of the posterior thoracic and 3,4 abdomen at the junction of the Department, 3,4 abdominal section of the central small black spots. The sixth abdominal segment to the abdomen paint black. There is a triangle black spot in the center of the ventral fifth abdominal segment of the parasite, and the sixth abdominal segment is connected to the black spot at the end of the abdomen.
Life habits Fujian, Zhejiang, Taiwan, 3 generations old, with adult and sporadic end-aged nymphs hidden in the dry sheath near the base of the cane stem or semi-cracking of the cane stems of the leaf sheath, heart overwintering. From late February to early March of each year, adults of the overwintering season began to spawn on perennial ratoon seedlings, and adults emerged after the end of March. Since then, the number of insects in the field has gradually increased, and the amount of insects in the field has reached a peak in August, and the number of insects has gradually declined since the end of August. Autumn warm and dry is prone to occur. Adults and nymphs usually hide in the heart or leaf sheath of cane seedlings, dry sheaths feeding or activities, often 3 to 5 or 20 to 30 head gathered in a leaf sheath. Adults hi crawl, quickly flee by the disturbance, and can mate many times in one life. The eggs are laid on the inside of the green cane of sugar cane, arranged side by side, at least 2-3 capsules, more than 8-9 pellets or more than 20 rows, females live for life. Spawning 50-10o more than one grain. 30-30 days of adult life, the male is slightly shorter. The average daily temperature of 19.4 °C eggs about 45 days, 24.1 °C 23 days. A total of 5 instar nymphs, the average daily temperature of 24 °C, nymphal period of 50 days.
Control methods (1) The dry sheath and the defeated leaves should always be removed. (2) May-June sugarcane seedlings were sprayed with about 80% dichlorvos EC 1000 times or 40% Dimethoate 1200 times, 50% phoxim EC 1500 times, and 50% chlorinated pine EC 1000 times. liquid.
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