To control lychee and longan locusts to select quasi-medicine

Litchi and longan locust locusts are the main pests responsible for damage to litchi and longan fruits. Not only are they likely to cause fruit rot, reduce the fruit setting rate, and reduce yield, but they also defecate in the flesh, making the fruit inedible. Many growers of litchi and longan origin reported that it is difficult to control lychee and longan locust locusts, and continuous spraying will also cause harm. Fruits will be mature when the fruit matures. In fact, there is no time for prevention and control, and no use of anti-drug agents.

The litchi and longan locust locusts lay eggs in the fruit pedicle when the fruits of the litchi and longan fruits begin to turn color, and then hatch into larvae and invade into the flesh. The first spraying should be carried out when the adult just begins to lay eggs, that is, when the pulp is full of fruit nucleus and the fruit begins to turn color. When the adult hatches after about 10 days after spawning, it is necessary to spray the second drug. Generally, the entire fruit needs to be sprayed for 3 to 4 times until the harvest is stopped 7 to 10 days before the harvest. In this way, the occurrence and damage of locusts and long-spotted locusts can be effectively controlled. If you miss this time spraying, the control effect is very poor.

The pesticides for controlling lychees and longan locusts have been proven through years of experiments and applications. The pyrethroid pesticides have the best effect, and they not only have good effects in killing adults and eggs, but also have good permeability and strong penetrating power. Infiltration into the flesh will kill the larvae, and the residue is small, the residue period is short, does not pollute the fruit, does not endanger human health, does not pollute the environment. In China, the lychee and longan producing areas have a good control effect on litchi and longan locust locusts, all of which are 1500-fold 5% Lambda-cyhalothrin aqueous solutions, 1000-fold 4.5% Beta-cypermethrin aqueous solutions, and 1500-fold 2.5% deltamethrin. Pyrethroid pesticides such as an aqueous ester solution and a 1,000-fold solution of 5.75% solution of stearyl ester were sprayed and controlled.

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