Rice leaf roller, also known as rice leaf curler, commonly known as shavings, white leaf insects, and leaf-leaf insects, is the main pest of rice growth period. The pest is damaging the rice with larvae, and the leaves are entangled in the mediastinum, hiding the epidermis and mesophyll. The symptom is that the affected leaves only leave the white epidermis. When the rice worm population density is large, it can be seen that the white leaves are full of fields, which seriously affects the normal growth and development of rice, and the yield is reduced by 2-3%, and the weight can reach 5-6%. Therefore, it is necessary to strengthen the prevention and treatment of chemicals in order to effectively mitigate the hazards. In recent years, a large number of agricultural technicians have screened out a number of safe and efficient pesticides for controlling rice leaf roller, which can be used for reference.
Control agent: 5% with 5% Regent suspension 40 ml or 5% Regent suspension 25 ml + 20% triazophos EC 60 ml or 35% Suifeng emulsifiable concentrate 80 ml or 35% vertical clarification wettable powder 80-100 g or 20% green Demi microemulsion 50 ml or 98% Bataan wettable powder 40 g or 40% bole emulsifiable concentrate 60 ml or 40% chlorpyrifos EC 75-100 ml (used in egg hatching peak) or 40 % New Rural Insurance EC 60 ml and so on.
At the same time, we must pay attention to mastering the prevention and control indicators, that is, in the tillering period, there are 20 larvae per plexus of rice or 3000 new worms per 667 square meters (mu), and there are more than 15 larvae before and after the booting stage. It is necessary to spray it in time.
In addition, the use of the medicament is to uniformly spray the rice field with 50 kg of water at the peak of the young larvae.
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