The American white moth is one of the pests belonging to the family Lamp moth family. It has the characteristics of fast occurrence, overeating, light-seeking, and fun. It is especially more likely to occur on smelly puddles, fishy smells, and scented forest plants. It often harms poplar, apple, pear, plane, elm, ailanthus, ash, cherry blossom and other tree species.
Hazard time:
It usually starts in May and ends in September. Among them, mid-May to late June, late July to mid-August are two feathering periods, and the temperature at this time is suitable for feathering, generally between 17-25 degrees. Late May to late July and early August to early November are the infestation periods for white moth larvae, when the temperature is generally 24-26 degrees, and the development of formal larvae is the most suitable temperature. When the temperature exceeds 38 degrees and the humidity is less than 50%, it has an inhibitory effect on the occurrence of white moths. However, the damage is generally significantly reduced from the beginning of September, and the insect infestation gradually enters a wintering state.
Main hazardous areas:
The American white moth mainly endangers the new leaves by spitting silk knots, forming a net curtain on the leaves, and when it is severe, the leaves are eaten only the leaf veins, and even the young new shoots are endangered.
Morphology of the American white moth:
American white moth, adult is a white moth. The antennae of the male moth are black, and the antennae of the female are brown. The larvae vary greatly, ranging from red to black heads.
Prevention and control measures:
Because the white moth does not like light, the American white moth is mostly feathered around the evening, and attention should be paid to the choice of the application time, it is best to choose after 4-5 pm, which is more conducive to the prevention and control of white moths.
(1) It is recommended that prevention and control begin in early May and mid-July. It can be controlled by spraying malathion, cypermethrin, matrine and so on.
(2) During the occurrence of adult insects, it is necessary to use the light and taste of adult insects to hunt adult insects with insect attractants and sexual attractants.
