What harm does thrips do to navel oranges?

What harm does thrips do to navel oranges? How to control thrips with navel orange? Also ask experienced netizens to help introduce the tiny body of thrips, generally only about 1mm, the naked eye is not easy to find, need to use more than 10 times magnifying glass observation, can see clearly; the main harm to citrus is citrus thrips, which has a greater impact on navel orange production. Therefore, the farming network has sorted out the harm and control methods of thrips to navel oranges, which are listed in detail below for netizens' reference. Harm of thrips to navel orange: thrips mainly damage young leaves and young fruits of navel oranges with nymphs and adults. The navel orange leaves are deformed and curled after being damaged, and their growth potential is weak, which is easy to be confused with the damage caused by Tetranychus tarsus. The young fruit of navel orange suffered, the epidermis oil cell ruptured, gradually lost water and dried up, and the scar expanded with the expansion of the fruit, showing different shapes of corked silver-white spots. The size of the damaged fruit is normal, and the quality is basically not affected, so that it does not affect the storage, but affects the appearance of the fruit and reduces the commodity value. The most serious harm is from the flower thanks to the end of the second physiological fruit drop. Thrips damage not only citrus, but also apple, grape, loquat, persimmon, plum and plum and other fruit trees. Because thrips are small and not easy to be found, and their damage symptoms are easy to be confused with rust wall lice, side polyphagous mite and wind-blown fruit and branch thorns, they are often not paid attention to. The life habits of thrips: the peak period of the first generation adults of thrips is from May to June, and that of the second generation is from July to August. The insect population decreased gradually after September. The adult thrips lay eggs in the young tissue epidermis of the host, and the egg period is 6-7 days, and the hatched nymphs begin to file the host epidermis and absorb juice. At the age of 2, they pupate in bark, dead branches, weeds or soil. The adult thrips are very active and spread very fast, but they are afraid of the sun and do harm in the shade during the day and on the leaves on cloudy days at night. In general, the weather is sunny and dry early, and the damage is serious; torrential rain can reduce the density of insect population, which is disadvantageous to the occurrence of high temperature and humidity environment. Prevention and control of thrips: step 1, thoroughly remove withered branches, fallen leaves and weeds in the garden before the beginning of spring, and burn them centrally to eliminate overwintering eggs. Step 2, do not plant peanuts or grapes in or near the navel orange orchard, and control thrips on nearby tobacco and peanuts in time in early spring and autumn to eliminate insect sources. Step 3, timely irrigation of navel oranges, especially in the event of drought in early spring. Step 4, strengthen the inspection from blooming to young fruit period of navel oranges, and when about 20% of the fruits are found to have insects or damage, use medicine to prevent metallurgy. After 5 days of treatment, if the nymph condition is still serious, you can spray it again. Pay attention to the selection and rotation of medication. You can use 20% methamphetamine EC or 2.5% enemy killing EC 3000 times, 50% malathion EC 1000 times, 80% dichlorvos EC 1000 times, rotenin 800 times or 20% dichlorvos EC 2500 times, etc. The management method of navel orange where is the hometown of navel orange in China?