The scientific name Hydrellia philippina Ferino is Diptera, Hymenoptera. The waterfloat is a general name for the damage of rice waterflies. In addition to the oriental eyed waterflies, there are many species such as the gray-horned waterflies and rice fly (Ephydra macellaria Egger). Five species have been found around the world, with similar shapes. Distribution of rice areas across the country. Host rice, wild white, wild British, Lee's cricket and so on. The larvae devoured leaf sheaths and leaf flesh, and the yellow-brown infestation debris was accumulated in the stalks of the leaf sheath insects, and the decayed plants were folded. Morphological characteristics Adult body length 1.7-2.3mm, wingspan 4.6mm, body gray-brown to dark gray, head lead gray. Compound eyes black short hair. The amount is short. The abdomen is black, but it is covered with fine hairs and green-gray, but the back of the abdomen is dark gray, with a gray ring at the back of each link. At the end of the abdomen, males have a flat protuberance at the end of the abdomen and are born in the middle of the base of the lateral leaf. Egg length 0.5-0.7mm, long spindle, colostrum white, after the gray. The last instar larvae are 6-8 mm in length, colostrum white, later light yellow to yellow-green, long cylindrical, and 11 knots. The body surface is smooth and bristly. The needle is dark brown and the back end is bifurcated. Chest valve protrusion, abdominal end with a pair of valves. It is 5-9mm long, 2-3mm wide, 12-body, cylindrical, early yellow-brown, yellow-brown or tan afterwards. There is a pair of black valve protrusions at the tail. Life habits in Xiangzhou, Guangxi, and 8 generations in Taiwan. Overwintering larvae began to move in mid-March of the following year. The larvae migrated from rhizomes of Lee's pupa, late rice, and winter white. The period is from mid-April to early June and late May to mid-July. The 4th, 5th, and 6th generations occur from early July to mid-August, early August to mid-September, and early September to mid-October. . Each female can produce 10-40 eggs, the adult life of 4-8 days, eggs scattered production, egg period 2-4 days, larvae 11-20 days, flood season 5-11 days. In addition, the habit of rice stems, waterflies and waterflies are similar to this insect. Rice damage is mainly from early May to mid-October. From late July to early October, it is the peak period of damage, and the third and fourth generations occur in large quantities throughout the year.
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Shangdong province is the main machinery production base in China.
KANGERJIAN Medical Technology Co., Ltd. is a group of senior lighting design expert and machinery manufacturing expert company with 20years experience and factory locating in the east city--the hometown of confucius--Qufu in Shandong province, China.
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Control methods (1) Through regular inspection of the progress of phlegm-removal, the peak of adult emergence and the hatching period of eggs are predicted, and the divergence is conducted once every 5 to 10 days. (2) Completely eliminate the remaining rice stubs before March of each year and concentrate them deeply or burn them. (3) The main defense of the first and second generations is to control the third and fourth generations to kill the newly hatched larvae and treat the adults. Spray 25% Ekass EC 1500x or 2.5% deltamethrin 2500x, 10% PVP 2500x, 50% fly nectar or 35% PF 2000x . (4) The quarantine is conducted. Rice seedlings with waterflies are prohibited from being shipped out.
