How do you control striped flea beetles in rapeseed cultivation?
What harm do striped flea beetles cause to rapeseed? How do you control striped flea beetles in rapeseed? Please explain the methods. The harm of striped flea beetles to rapeseed: The striped flea beetle is commonly known as the cabbage flea and soil flea, and its larva is called the white maggot. This insect can not only fly but is also good at jumping, making it difficult to catch on the leaves; when disturbed, it jumps to the ground or to field-edge ditches, ...
What harm do striped flea beetles cause to rapeseed? How do you control striped flea beetles in rapeseed? Please explain the methods.The harm of striped flea beetles to rapeseed:The striped flea beetle is commonly known as the cabbage flea and soil flea, and its larva is called the white maggot. This insect can not only fly but is also good at jumping, making it difficult to catch on the leaves; when disturbed, it jumps to the ground or to field-edge ditches, and then quickly flies back onto the leaves to feed. It often gathers on the underside of leaves to feed, and the damaged leaf surface becomes covered with dense small oval holes.
On sunny days, adult striped flea beetles mostly hide on the underside of leaves or in soil cracks, and come out in the morning and evening to cause damage. The larvae only damage the roots of the cabbage, boring into the root bark and biting off the fibrous roots, causing the leaves to wilt and die. Damage is most severe at the seedling stage, often causing missing plants in rapeseed fields, and even destroying the entire field.
Control methods for striped flea beetles:Generally, after sowing and once the insects appear, spray the rapeseed or drench the roots in the morning and evening with a 2000-3000 times dilution of 40% fenvalerate-malathion emulsifiable concentrate, a 1500-2000 times dilution of 80% dichlorvos, or a 2000-3000 times dilution of 50% phoxim.
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