. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. 25 by eating the leaves and gnawing the stem; later on they may be found in the flowers where, however, they seem to feed on the nectar and not to do much harm. The beetle is less than half an inch in length, 3ow„"Jht k'^^'L^ ir ,'" ''°^°' "^''^ ^ ^^^""^ •'"^ ^"'l ^^"^ black stripes down the back The larvae are slender white grubs which feed upon the roots of the plants and sometimes burrow up into the stem, continuing their injuries for about a month, when
. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. 25 by eating the leaves and gnawing the stem; later on they may be found in the flowers where, however, they seem to feed on the nectar and not to do much harm. The beetle is less than half an inch in length, 3ow„"Jht k'^^'L^ ir ,'" ''°^°' "^''^ ^ ^^^""^ •'"^ ^"'l ^^"^ black stripes down the back The larvae are slender white grubs which feed upon the roots of the plants and sometimes burrow up into the stem, continuing their injuries for about a month, when they change to the pupal stage and later on come out as a second brood of the beetles. The latter art- very lively insects, flying quickly from plant to plant when disturbed: sometimes when their usual food is not available they attack the youn- pods of peas and beans, and may be found on a variety of other plants. Fig. 35. Striped Cucumber Beetle, grub and papa—much enlarged, Fig. 36. Spotted Cucumber Beetle enlarged. and Te« ov», K ^ " ''^'*! ^^'^- 3^) « larger than the Striped, and less oval, broadening considerably towards the posterior end o the body; its color is yellowish green, with a black and three rows of four black spots, making twelve in all, on the covers ?tTs a Unked°sJ« -1"^* *^^" '^'^ -^-"P"^ ^^'^^' ^"^ '" ™^"y P^rts of the United States it does serious injury to the roots of corn. In Ontario l'nt"'K ?• T"^ associated with the other species on cucurbitaceous plants, but in fewer numbers; it is also a much more general feeder attacking a great variety of plants; it. life history is smewhat similar n 1 P[^f,*^'"8:, but It seems to feed mostly upon the pollen of blossoms in the beetle stage, the grubs being the chief cause of injury by their attacks upon roots and stems. The treatment for both these insects is chieflv preventive. Youne cucumber and melon plants should be protect
Size: 1812px × 1379px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubj, booksubjectinsectpests
