Green blind bugs, commonly known as small bed bugs, stinky niangniang, etc., is apples, pears, dates, peaches, grapes and other fruit trees in the young fruit stage of the most harmful pests, do not look at the small head, the harm is very serious, prevention and control is not timely, can cause a large number of young fruits to be killed, causing serious economic losses. Recently, a green blind bug attractant developed by the Institute of Plant Protection of the Chinese Academy of Agricultural Sciences can effectively kill green blind bugs, which is very simple to use, long-lasting, good effect, non-toxic and non-polluting, and has been popularized and applied in many places, and is welcomed by farmers.
Hazard characteristics of green blind bugs
Green blind bugs for the order Hemiptera, pests of the family Hagfish, mainly adults and nymphs harm the young parts of young fruits, flower buds, young leaves, young shoots and other fruit trees, after the young leaves are damaged, the initial leaves appear brownish red dots of different sizes, gradually expanded into holes of different sizes, the later leaves will be wrinkled, can not be flattened, photosynthesis is reduced; flower buds are damaged, small red dots will appear on the buds, causing the buds to fall off directly; young fruits are killed, the young fruit will be affected by the site of reddish-brown colloidal, late, The victim will be dented or grow rust scars or tumors, and the fruit will lose its edible value. Resulting in severe production cuts. The host plant of green blind bugs is very extensive, and can harm dozens of crops such as pears, grapes, apples, peaches, pomegranates, dates, cotton, alfalfa and so on.
Regularity of occurrence
Green blind bugs can occur in 3 to 5 generations a year, mainly overwintering as eggs in gaps in the bark of fruit trees or in broken branches, as well as in soil crevices. The following year from March to April, when the temperature exceeds 10 ° C, the overwintering eggs begin to hatch as nymphs, the blooming period comes relatively quickly, about mid-to-late April will erupt, because the green blind bugs are very small, only about 5 mm long, the whole body is green, and the leaf color of the fruit tree is very close, not easy to be found, it is difficult to find in the early stage, a large number of nymphs hatch, often causing a large number of young fruits to be killed, at the end of May and the beginning of June, the first generation of adult insects migrated to the orchard outside the weeds, cotton, forage, vegetables and other hosts on the harmful reproduction, The 5th generation of adults overwinters in early October. Therefore, the first generation is the most harmful. Green blind bugs generally occur in a generation about 30 days
Causes of difficulty in prevention
Due to the thick elytra covered by the surface of the body, the green blind bug adult is strong in migration, the reproductive speed is fast, and the generation overlap is serious, often the adult, nymph and egg exist at the same time, and it is difficult for ordinary chemical agents to completely kill it. In addition, fruit trees due to more diseases, green blind bug body is small, adult and nymph body color are green, and plant leaf color is basically the same, and has the daytime lying on the back of the leaf and weeds, mobile dispersion hazards, egg laying in the plant tissue and other habits, so it is generally not easy to be found, many fruit farmers after the fruit tree is not known to be green blind bugs, mistakenly believed to be diseases or deficiency of vegetarian disease, thus missing the best control period.
Prevention and control measures
(1) Sexual attractants to trap adult insects: In the early stage of green blind bugs, the use of green blind bugs to trap male adults, reduce the mating and spawning of adult worms, can greatly reduce the harm of green blind bugs. The specific usage methods are:
The overwintering green blind bug nymphs begin to be used about 1 week before feathering, and 3 to 5 traps are suspended in the field per acre, each with a swing core, and suspended at two-thirds of the height of the tree. Clean up the dead insects in the trap every 4-7 days in time, or clean up the dead insects in the trap in time according to the actual amount of insects, and replace the swing core every 4 weeks.
(2) Medicament spraying: In the early stage of green blind bug nymphs, use 22% flufenalinin nitrile suspension agent 4500-6000 times liquid, or 1% bitter vine water emulsion 1000 times liquid spray, which can effectively kill newly hatched nymphs.
Combining these two methods can greatly reduce the harm of green blind bugs.
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