Hummer HD pictures and prevention methods, Hummer is an insect that relies on plant juice to survive, and belongs to the insect class Lepidoptera in animal taxonomy. The larvae are white, yellow, or orange, while the adults are brown or black. Leaves and flowers are damaged when eating. The damaged young leaves and young shoots become hard and curled, the plants grow slowly, and the internodes are shortened; the young fruits (such as eggplant, cucumber, watermelon, etc.) will harden after being killed, causing fruit drop in severe cases, which seriously affects yield and quality.
There are many measures for prevention and control, including yellow plate and blue plate trapping, covering the mulch to block the soil, etc., but in the rising population period, the number of controlled populations is increased and the pesticides are still dominated. In order to provide producers with reference to the use of pharmaceuticals, the author designed and arranged commonly used agents such as doxorubicin, imidacloprid, acetamiprid, avidin, avermectin and chlorpyrifos. The horse was tested for indoor virulence and field control.
The results showed that both the western flower thrips and the American spiny horses were very sensitive to spinosad in the various tested drugs. When the test concentration was 2 mg·L-1, the corrected mortality rate was 60% in 24 h (hours). Above, 72 h (hours) reached 89%, and the LC50 values ​​of the two species of thrips were 1.849 0 mg·L-1 and 0.607 4 mg·L-1, respectively. The resistance multiples of the western population of the western flowering thrips to imidacloprid, acetamiprid, carbaryl, avermectin and chlorpyrifos were 1.06, 2.05, 3.90, 3.28 and 7.76 times higher than the sensitive population, respectively.
It is recommended to use high-efficiency, low-toxicity and low-residue agents to control the damage in the early stage of the thrips. The seedlings in the nursery sheds were planted before and after the planting of the thrips. The first action was to use 2.5% doxorubicin suspension 1 000 to 1500 times for the control. The effect was the best.
You can also choose 10% imidacloprid wettable powder 2 000 times solution, 2% carbaryl salt 2,000 times solution, 1.8% avermectin emulsifiable concentrate 2 000 ～ 3 000 times solution, 3% acetamiprid emulsifiable concentrate 2 000 ～ 3 The 000 times solution was used alternately to delay the production of resistance to doxorubicin in the thrips.
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