. Manual of vegetable-garden insects. luish black flea-beetle is generally distributedthroughout the United States and Canada east of the RockyMountains where it has been recorded as injurious to potato,bean, corn, beet and cabbage plants in the seed-bed. It has 324 MANUAL OF VEGETABLE-GARDEN INSECTS also been known to injure cranberries and grapes as well asapple and pear grafts. The beetles feed on a wide variety ofweeds, including smartweed, pigweed, daisy, fleabane, ragweed, plantain, catnip, dock andgoldenrod. The beetle is slightly more than i inch in length, and bluish black in color, w
. Manual of vegetable-garden insects. luish black flea-beetle is generally distributedthroughout the United States and Canada east of the RockyMountains where it has been recorded as injurious to potato,bean, corn, beet and cabbage plants in the seed-bed. It has 324 MANUAL OF VEGETABLE-GARDEN INSECTS also been known to injure cranberries and grapes as well asapple and pear grafts. The beetles feed on a wide variety ofweeds, including smartweed, pigweed, daisy, fleabane, ragweed, plantain, catnip, dock andgoldenrod. The beetle is slightly more than i inch in length, and bluish black in color, with the antennae having the two basal segments dark, the next three or four light and the remainder dark (Fig. 203). They are most abundant in midsummer. The immature stages have not been described and the number of broods occurring annually is not known. When attacking cabbage in the seed-bed, the injury is best prevented by screening the bed with cheesecloth as is often done for protection against the cabbage root-maggot (page 35).. Fig. 203. — The smartweed flea-beetle (X 11). The Striped Cabbage Flea-Beetle Phyllotreta villata Fabrieius The striped cabbage flea-beetle shows a preference for crucif-erous plants, attacking cabbage, radish, turnip, horse-radish,water-cress, stock and wall-flower. It is also recorded as injuri-ous to tomato and strawberry. Its most important unculti-vated food plant is the wild mustard, but it also feeds oncharlock, shepherds purse and rocket. The insect rangesthroughout the United States and southern Canada east of theRocky Mountains. The beetles hibernate in sheltered placesand appear in the fields in the spring, in western New Yorkabout the middle of May, The adult is about yV ii^ch in length, FLEA-BEETLES 325 black, witli each ^vln2;-C()^cr marked with a wavy yellowishstripe, narrowed in the middle and incurved at each end (). The beetles are most destructive to cabbage plants be-fore the fourth leaf has appeared or during the firs
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
