Triệu chứng Attacks by the caterpillars of the winter moth can be first noticed in spring when the emerging leaves show signs of damage. This is usually more visible in mid-summer, when leaves are fully expanded. By then, the caterpillars have left the tree but the small holes made during
Winter Moth
Sâu bọ
Triệu chứng
Attacks by the caterpillars of the winter moth can be first noticed in spring when the emerging leaves show signs of damage. This is usually more visible in mid-summer, when leaves are fully expanded. By then, the caterpillars have left the tree but the small holes made during the spring have enlarged with normal leaf growth to cover a sizable area of the leaf blade. The caterpillars also feed on flower buds and developing fruits. Once a bud has been damaged, they migrate to other buds and repeat the process. Early damage on young fruits develops into deep cleft on the skin by the time they have reached full size in late summer.
