This year due to the exceptionally severe drought in winter and spring, the severe damage to the Xiaochun crops was huge. To ensure the realization of the goal of “Large spring loss in Xiaochunâ€, to ensure the safe production of rice in big springs and reduce the damage caused by pests and diseases of rice planthoppers, the current rice production It has entered the cultivating management stage. Due to the arid climate conditions and the early migration of rice planthoppers in the southern region, field locusts have also appeared, and the amount of insects is high compared with the same period of the previous year. Therefore, the following comprehensive prevention measures should be taken: 1. Biological control: First, protect natural enemies. Rice planthoppers can be preyed or parasitized by many natural enemies in rice fields. For example, various spiders, frogs preying on adult nymphs, black-shouldered green-lipped moth sucking eggs of rice planthoppers, all kinds of rice borer wasps parasitizing on eggs of rice planthoppers, and various bee stings are parasitic on rice planthopper nymphs. These natural enemies can play a role in inhibiting the occurrence of rice planthoppers. In the use of pesticides, we must pay attention to the selection of low-toxicity pesticides with low killing power to natural enemies, especially in the early stage of rice, to minimize the use of pesticides or to reduce the use of pesticides. The second is ducklings in paddy fields. According to the situation of pests in paddy fields, the ducks are controlled by the ducks in the paddy fields not only for the rice planthoppers but also at the peak of the rice planthoppers and leafhopper nymphs, as well as the locusts and rice rolls. There are significant control effects, and due to the trampling of ducks, there are very few weeds in the paddy fields and they have received the dual effect of pest control and weed control. 2. Cultivation and prevention: Planting methods such as dense planting, shallow water irrigation, timely drying of the field, partial application of nitrogen fertilizer, prevention of long-term greediness in rice and reduction of moisture in rice fields, etc., can reduce the propagation coefficient of rice planthoppers. 3. Chemical control and prevention: Due to the large area of ​​rice planthopper and the severity of the damage, investigating insect pests and using selective pesticides are still the main measures for prevention and control. The application was started when there were more than 800 insects per 100 clusters of rice. Use 70% imidacloprid wettable powder 2 grams per mu; 750 or 15% Ruijin special glue suspension 30 to 40 ml; or 25% buprofezin powder 30 g water 37.5 kg spray. Generally occurred in the main damage generation per acre with 1% chlorfenone (avermectin) suspension 40 to 50 ml prevention and treatment of the appropriate period for the young nymphs prosperous period. 4. Application method: The liquid is sprayed on the middle and lower parts of the rice (particularly harmful to rice planthoppers) and has the best control effect.
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