Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . le are satisfac-tory remedies, and it has been observed that the Bordeaux mix-ture acts as a deterrent when liberally used, serving thus thedouble purpose of checking insect injury and plant is also a very satisfactory material used as a decoc-tion, but is scarcely economical except on a small scale or ingardens. The sweet-potato flea, Chcetoc7iema confinis, is an inter-esting, if troublesome, small, bronzed beetle, attacking the leavesof the young plants just
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . le are satisfac-tory remedies, and it has been observed that the Bordeaux mix-ture acts as a deterrent when liberally used, serving thus thedouble purpose of checking insect injury and plant is also a very satisfactory material used as a decoc-tion, but is scarcely economical except on a small scale or ingardens. The sweet-potato flea, Chcetoc7iema confinis, is an inter-esting, if troublesome, small, bronzed beetle, attacking the leavesof the young plants just after they have been set out, and eatinglittle channels along the veins, finally making the net-work socomplete that the leaves shrivel and dry. If the vines get a fairstart, they outgrow the injury very rapidly, but cold, wet weather,by retarding growth, sometimes enables the insects to kill the plants before they are set out in the arsenate of leadmixture, at the rate of fifteen ounces to fifty gallons of water, willprove a satisfactory protection without danger of injury to the Fig. 217. Fig. Fig. 217, grape flea-beetle, Haltica clialybea, in all its stages, on a grape shoot. , work of the sweet-potato flea on the leaves. Fig. 219, pale-striped flea-beetle, Sys-lena blanda. Fig. 220, the rosy Hispa, Odontota THE INSECT WORLD. plants. Or they may be thorouglily sprayed with the Bordeauxmixture immediately after being- set out. Of somewhat larger size and more slender, graceful form arethe species oi Systena, and of these, ^. blanda, the pale-stripedflea-beetle, has become best known by reason of its injury on agreat variety of plants, including sugar-beets. As with the otherfleas it is injurious in the beetle stage only, and, as a rule, inearly sunmier on young plants. I have seen it ruin an entirefield of carrots, and have found it on melons, potatoes, beets, andpig-weed in equal abundance. Its life history has not been pub-lished, but it
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
