Hazardous symptoms: After the young leaves are damaged, they first appear with small dead spots, with the leaves buds stretched, the dots become irregular polygon holes, commonly known as "broken leaf madness"; the flower buds suffer death and fall off; the young fruit victim surface shows no obvious yellow Small brown spots, as the fruit grows and gradually expands into black, the subcutaneous tissues of the affected site are necrotic, and the fruit cracks when severe.
Occurrence pattern: 3 to 5 generations in 1 year, egg wintering under various fruit bark, egg hatching in March and April, grape damage after late April sprouting, and leaf spreading stage in mid-May is the period of destruction. The 1, 2, 3, and 4th generations appeared in early June, mid-July, mid-August, and mid-September, respectively.
Key period of prevention and control: The period from germination to leaf development is the peak period of damage caused by L. lucidum. According to the characteristics of its damage in the early evening, it is best to spray the medicine in the early evening during the prevention and control, spraying the ground and the tree at the same time.
Control agent: It can be used with 2.5% Tailong 1000 times +10% Qianhong 2000 times or 4.5% Zhenglong 1000 times +45% Mengmeng 6000 times.
Hummer
Hazardous symptoms: I like to use its sucking mouthparts to break the epidermis of the young organs of the plants and then suck the juice. The parts that are damaged by the thrips are the first buds, young fruits and young leaves. The damaged leaves are shrinking and deformed and carefully examined. The back of the leaves will be found in thrips; irregular shaped necrotic plaques appear on the fruit surface. These patches usually start from the stems, which are formed by the friction between the particles and the wind. Differently, the plaque caused by friction is generally distributed in the contact between the fruit particles.
Key prevention period: During the whole growth period, as long as the temperature and humidity conditions are appropriate, there will be damage to the thrips, but mainly before the young fruit period, the summer high temperature thrips damage will be reduced; the thrips are adults, first and second instar larvae in the tree On the move and damage, mature larvae and cockroaches are in the soil.
Control agent: It can be used with 2.5% Tailong 1000 times +10% Qianhong 2000 times or 4.5% Zhenglong 1000 times +45% Mengmeng 6000 times.
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