What insecticides are used to control the rice leaf roller?
What damage does the rice leaf roller cause? Which insecticides can control the rice leaf roller? Please give an introduction. Zhongdiwang has compiled the damage caused by the rice leaf roller and the insecticide control methods, listed below for netizens' reference. Damage caused by the rice leaf roller: The rice leaf roller, also known as the rice leaf roller worm, commonly called the leaf-scraping worm...
What damage does the rice leaf roller cause?Which insecticides can control the rice leaf roller? Please give an introduction.Zhongdiwang has compiledthe damage caused by the rice leaf roller and the insecticide control methods, listed below for netizens' reference.
Damage caused by the rice leaf roller:
The rice leaf roller, also known as the rice leaf roller worm, commonly called the leaf-scraping worm, white-leaf worm, leaf-rolling worm, etc., is a major pest during the rice growing period. This pest damages rice as larvae, binding leaves into longitudinal rolls, hiding inside and gnawing the upper epidermis and leaf mesophyll; the symptom is that the damaged leaves retain only the white lower epidermis. When the pest density in the paddy field is high, white leaves can be seen all over the field, seriously affecting the normal growth, development and yield of rice, causing a yield reduction of 20-30% in mild cases and up to 50-60% in severe cases. Therefore, insecticide control must be strengthened to effectively reduce the damage.
The rice leaf roller can be controlled by referring to the following methods
Selection of insecticides: Use 40 ml of 5% fipronil suspension concentrate per mu, or 25 ml of 5% fipronil suspension concentrate + 60 ml of 20% triazophos emulsifiable concentrate, or 80 ml of 35% Suifeng emulsifiable concentrate, or 80-100 g of 35% Zongjuanqing wettable powder, or 50 ml of 20% Lude fu microemulsion, or 40 g of 98% cartap wettable powder, or 60 ml of 40% Bole emulsifiable concentrate, or 75-100 ml of 40% chlorpyrifos emulsifiable concentrate (used at the peak of egg hatching), or 60 ml of 40% Xinnongbao emulsifiable concentrate, etc.
Control timing:Be careful to grasp the control threshold, that is, during the tillering stage, when there are 20 larvae per 100 rice hills or 3,000 new leaf rolls per 667 sq m (mu), or around the booting stage when there are more than 15 larvae, the field should be sprayed promptly.
Methods of using the insecticides:At the peak of young larvae, dilute with 50 kg of water and spray evenly over the paddy field.
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