. Bulletin. he caterpillars to spin their cocoonsbeneath, and to remove them at the proper time, and put them inscalding water to destroy the worms. By far the most successful method as yet adopted is to shower theapple trees with Paris green in water, one pound to one hundredand fifty gallons of water, when the apples are about the size ofpeas, and again in about a week. THE CABBAGE LEAF-MINER. t Plutella cruciferarum Zell. The cabbnge leaf-miner is not a native of this country, but wasimported from Europe. The perfect moth, Fig. 25, /, with the wings expanded, (h, withthe wings closed, g, a
. Bulletin. he caterpillars to spin their cocoonsbeneath, and to remove them at the proper time, and put them inscalding water to destroy the worms. By far the most successful method as yet adopted is to shower theapple trees with Paris green in water, one pound to one hundredand fifty gallons of water, when the apples are about the size ofpeas, and again in about a week. THE CABBAGE LEAF-MINER. t Plutella cruciferarum Zell. The cabbnge leaf-miner is not a native of this country, but wasimported from Europe. The perfect moth, Fig. 25, /, with the wings expanded, (h, withthe wings closed, g, a dark variety,) measures three quarters of aninch. The fore wings are ashy gray, and on the hinder margin is awhite or yellowish white stripe having three points extending into thegray, thus forming, when the wings are closed, three diamondshaped white spots. Generally there is a dark brown stripe betweenthe white and the gray. There are also black dots scattered abouton the anterior part of these wings. 31 f. m i Fig. 25. The hind wings are leaden brown, and the under side of all thewings is leaden brown, glossy, and without any dots. The antennae are whitish with dark rings, and the abdomen are two broods of this insect in this region, the moths of thefirst appearing in May, and those of the second in August. Theyhibernate in the pupa stage. The caterpillars, Fig. 25, a, (6, the top and c, the side of a seg-ment,) appear in June or July and September; they are small andcylindrical, tapering at both ends, pale green, and about one-fourthof an inch long. The head has a yellowish tinge, and there areseveral dark, stiff hairs scattered over the body. When ready to transform, this caterpillar spins a delicate gauze-like cocoon. Fig. 25, e, made of white, silken threads, on the underside of a cabbage leaf. The pupa, Fig. 25, cZ, and i, the end of apupa, is commonly white, sometimes shaded with reddish brown,and can be distinctly seen through the silken case. The first br
Size: 2240px × 1115px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookd, bookpublisherslsn, booksubjectagriculture
