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1(52)叶部受害 2(51)叶片受害 3(4)叶片变形,皱缩,形似鸡冠,许多变形叶片聚在一起形成球状虫瘿。…………………毛白杨瘿螨 Eriophyes dispar 4(3)叶片不变形,不皱缩。 5(18)叶片上有潜痕或变色。 6(13)叶片上有潜痕。 7(10)潜痕宽阔呈病斑状。 8(9)潜痕形成黑褐色虫斑,有时2—3个连成大黑斑,撕开黑色表皮内有乳
1 (52) Leaf damage 2 (51) Blade damage 3 (4) Leaf deformation, shrinkage, the shape of the cockscomb, many deformation of the leaves together to form a spherical worm. ....... Populus eriophyes dispar 4 (3) Leaves no deformation, no shrinkage. 5 (18) Lurks or discoloration on leaves. 6 (13) Latent traces on leaves. 7 (10) Latent scar was spotted. 8 (9) Streaks form dark brown insects spots, and sometimes 2-3 even into a large dark spot, ripped black skin with milk