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Characteristics of damage: adults, nymphs onions or scallions heart buds, shoots and leeks leaves, long strips of white spots appear when victimized, severe onion leaves distorted and yellow.
Morphological characteristics adults: body length 1.1-1.3mm, body light yellow to brown yellow, compound eye purple.
Nymphs: Newly hatched white, yellow to dark yellow at old age.
Egg: 0.2mm long, kidney-shaped. ?
Life habits occur six to ten generations a year. Adults, nymphs, and anterior cockroaches and cockroaches live in overwintering onions, garlic sheaths or weeds, and in the soil around the host or in vegetable kilns. In the coming year, when the green onions and garlic turn green, they are damaged and then transferred among various hosts. In the spring, the garlic was injurious. After the early summer, it was severely damaged by onions. In particular, it was most severe from July to August. Adults are very active, good flying can jump, can use natural forces to migrate and spread. Adults are afraid of strong light, and they are more concentrated in backlight locations. Cloudy days, mornings, evenings and nights are only active on the surface of the host. Adults are mainly parthenogenetic and it is extremely difficult to see males. The eggs are produced in the subepidermal tissue. The average female egg-laying amount is 50, and the maximum number is 171. Female adults live for 8-10 days. The egg period is 6-7 days from May to June. Nymphs: A total of four instars, after the second-aged matured soil, peeled into the anterior ridge, and the anterior ridge dehiscent became deafness.
Onion thrips like warm, arid weather, its optimum temperature is 23-28 °C, humidity is 40-70%; humidity can not survive, when the humidity reaches 100%, the temperature reaches 31 °C, the nymph All died. In the rainy season, in the event of continuous rain, the water between the leaves of the onion can cause nymph death. After heavy rain or after watering, soil compaction is caused, so that the nymphs cannot enter the soil and the earthworms cannot hatch adult.
Control methods??
1. Remove the dead leaves from the field and reduce the overwintering base number.
2. Spray 40% Qixingbao EC 600 to 800 times or 21% killer EC 1500 times, 50% phoxim EC 1000 times, 20% chloral EC 2000x, and 10 during nymphs and nymphs. The imidacloprid can be 5000 times wettable powder, and pyrethroid pesticides can also be used. 20% compound Liuyangmycin EC 1000 times solution, 80% Bataan WP 2000 times solution, 25% synergistic quinolone EC 1000 times, etc., every 7-10 days, continuous control 2 or 3 times. The drug was stopped 7 days before harvest.
Green onion horse
Thrips tabaci Lindeman is also known as Thrips tabaci Lindeman, cotton thrips, guaranma, etc., Thysanoptera, Thripidae. It can endanger various plants.