Rice planthopper, a very common pest in the rice field, the harm of rice planthopper is mainly caused by sucking the sap of the rice plant, the rice plant is damaged, hindering the normal transmission of rice, water and nutrient transportation can not go up, but also carries some germs, resulting in a series of symptoms in rice, serious direct death.
In fact, the rice planthopper we say in the planting process does not refer to a pest, but there is a classification, and the general rice planthopper can be divided into three kinds: white-backed planthopper, gray planthopper and brown planthopper.
White-backed planthopper: A migratory pest that not only harms rice, but also some weeds in the field (such as barnyard grass, swimming grass, wheat lady, etc.), in addition, the white-backed rice lice are higher on the rice plant than the other two.
Gray planthopper: The mouthpart sucks rice sap as a pest, and like the white-backed planthopper, rice and weeds are harmful, and it is also a vector for some diseases such as stripe disease and leaf blight.
Brown planthopper: Under normal circumstances, it occurs more seriously in the late rice field, and it is also a migratory pest, which has a certain impact on the normal growth of rice.
Regardless of the type of planthopper, they have common habits, and the following 3 common ones are common:
1. Mobility
Rice planthopper (hereinafter unified to say rice planthopper, not specifically a planthopper), specific with the wind, long-distance propagation of the migration characteristics,
Adults can lie on the leaves, when the leaves flutter with the wind, the rice planthoppers also randomly migrate together, reach a place, begin to breed hazards, and then continue to fly with the wind, our common northern rice planthoppers can go to the south to harm, basically caused by this habit.
2. Clustering
Rice planthoppers are generally endangered in groups, not alone, if planthoppers are found in the field, there can be dozens or hundreds of rice plants, or even more, densely looking "scary", this is their cluster.
3. Phototropism
Planthoppers have phototropism, especially at night, if there is a light, it will cause planthoppers to gather quickly, and it is precisely by using this feature that we can control rice planthoppers through agricultural methods, such as placing fluorescent lamps.
Understanding the habits, the following is said that everyone is very concerned about the problem of prevention and control agents, agricultural prevention and control methods will not be elaborated, simply mentioned, you can use natural enemies, field ventilation, scientific water and fertilizer management and other measures.
At present, there are many drugs on the market to prevent and control rice planthoppers, and small helpers recommend that prevention be the mainstay, and do not wait for large-scale outbreaks before starting to use drugs. Commonly used agents imidacloprid, furazine, thiamethoxine, alenoxazine, pyadrenone, etc., some places can be controlled in a single dose, the effect is good, some areas, due to resistance problems, need to be compounded, we according to the local situation, specific choice of agents.
In addition, according to experience (in most areas), imidacloprid, thiamethoxine, furazine on the white back planthopper effect is good, pyadrenone or alenazone + pyrithodone, for three kinds of planthoppers, the effect can be, the specific we are subject to the local use of the effect.
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