How to eliminate grass clippings
(1) Horticultural control: During the pupation period of male insects and the oviposition period of female insects, the nearby wall worms are removed.
(2) Biological control: protection and utilization of natural enemy insects, such as red-ringed ladybug and black-edged ladybug, as well as parasitic natural enemies, such as wasps and white-muscled bees. And pay attention to the timely introduction and release of red ring ladybug in moderately harmful areas.
(3) Chemical control: 30 # engine oil emulsion can be sprayed 30 ~ 40 times about 40 days after the initial incubation period; Or spray 80 times of cotton oil soap solution (by-product of oil factory), and general laundry soap can also be used, which is safer for plants; Or spraying 400-500 times of 25% carbaryl wettable powder, which has rapid action and is safe to human body; Or spraying 5% imidacloprid emulsifiable concentrate; Or 1 0,000 times of 50% cartap EC. Use chemicals to minimize the damage to natural enemies.
Extended data
Coccidia is an insect belonging to Coccidae and Coccidia. Harm begonia, cherry blossoms, figs, crape myrtle, rose, red maple, citrus and other flowers and trees. Nymphs and female adults often gather in piles on bud axils, tender shoots, leaves and branches to suck juice, resulting in poor plant growth and early defoliation.
References:
Baidu Encyclopedia: Grass flies.