The rice water weevil is a Coleoptera, which is a quarantine pest. The main hazards are grasses and sedges. Adults damage rice leaves, and larvae damage the roots of rice. Generally, it can lead to a 10-30% reduction in rice yield, 50% or more in serious cases, and even no harvest. Prevention and control of rice water Weevil generally use agricultural control, physical control, biological control, chemical control and other comprehensive prevention and control measures.
An agricultural prevention and control can be taken to strengthen water and fertilizer management, appropriate shallow water cultivation methods for prevention and control. The vigorous seedlings were cultivated at the seedling stage, timely transplanted late, and dry and wet alternating water in the green period had good effects on reducing the harm of rice water weevil. During the growth of rice, pay attention to the drying of the field, so that the rice field mud hardening, inhibition of rice water weevil larvae. After rice is harvested, straw is disinfested and weeds are removed from the surrounding paddy fields. Effective control of rice water weevil.
Second, physical control can be set up in the rice growth period, killing rice weevil adults.
III. Biological control Reduce the use of high-toxicity and high-residue pesticides through paddy fields to protect predators such as cockroaches, frogs, fish, sparrows, tapirs, crickets, and spiders.
Rice field ducks and fish farming can also be used for biological control.
Four chemical control before transplanting, seedbed application can be controlled by 25% Aktai water dispersible granules. After transplanting, Honda can use 20% of the pesticide to kill 40 ml per acre, 36.8% of 50 ml of Victorian rice oil, and 4 grams of 25% Aktai water dispersible granules to spray water.
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