Chloramphenicol benzamide and indoxacarb are highly effective drugs for controlling lepidopteran pests such as rice leaf roller. Chloramphenicol benzamide is a new type of systemic insecticide for amides. It has a unique mechanism of action. It is mainly composed of stomach poisoning and contact killing. It mainly activates the insect nitin receptor and excessively releases calcium stored in smooth muscle and striated muscle cells. Ions cause the muscles of the pests to weaken and eventually die. The drug has strong permeability and systemic conductivity, and the drug can pass through the stalk epidermal cell layer into the xylem, thereby conducting along the xylem to other parts not applied, which is beneficial to protect the new leaves. The drug is not very effective against the larvae of the older rice leaf roller, and the insecticidal rate is relatively slow. Note that it should be used in the larval stage of the rice leaf roller to the 1st to 2nd instar larvae, or it can be applied in advance. Take full advantage of the good internal conductivity of the drug.
Indoxacarb has a fast insecticidal rate and a long-lasting effect. It has good control effect on rice leaf roller, and good control effect on older larvae is a major advantage of this medicine. The drug enters the worm through contact and feeding, and can block the sodium channel in the target pest nerve cells. The behavior of the pest changes rapidly, the coordination is poor, paralysis, the food is quickly terminated, and finally the death. The drug has no systemic conductivity, and the drug solution is sprayed onto the rice leaves without being absorbed and transmitted by the rice. The leaves that are not sprayed into the liquid medicine do not carry the medicine, and the newly grown leaves do not carry the medicine, so the new leaves cannot be protected. When the pests overlap, the new leaves are vulnerable to pests. In the late growth stage of rice, all the leaves are applied after the pumping, so there is no problem that the new leaves cannot be protected. In addition, rice leaf roller mites will die after taking the rice leaves, and the pests will not be able to spray the leaves that have not been sprayed into the liquid. Therefore, it is required to spray evenly and thoughtfully, and it is best to spray them on each leaf. When applying high-quality silicone additives, the strong diffusion and permeability of silicone additives can be used to spread the liquid to the whole leaf of the rice and penetrate into the leaves, which is beneficial to improve the control effect.
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