. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. 3i8 A A' ECONOMIC EN'J'OMOLOGV. Fig. 366. some in other plants. As with all other borers, there is difficulty in reaching' them directly, and besides destroying infested plants, nothing really satisfactory has been proposed. Diatrtza saccha- ralis bores into sugar-cane and into corn, often doing much in- jury to the latter crop in the States south of the Potomac. There are two or more broods, depending on latitude, the last remaining through the winter in
. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. 3i8 A A' ECONOMIC EN'J'OMOLOGV. Fig. 366. some in other plants. As with all other borers, there is difficulty in reaching' them directly, and besides destroying infested plants, nothing really satisfactory has been proposed. Diatrtza saccha- ralis bores into sugar-cane and into corn, often doing much in- jury to the latter crop in the States south of the Potomac. There are two or more broods, depending on latitude, the last remaining through the winter in the larval stage in the corn- stalks. We have thus an obvious remedy in removing and destroying or using these up completely before the spring follow- ing. In sugar-cane the matter is not so sirnple ; but by burning tops, cutting close to the surface, and planting in fall from sound canes only, the injury can be at least much reduced if not en- tirely avoided. It is another in- stance where an intelligent farm practice will answer every pur- pose, without a resort to insecti- cides of any kind. Mats, both flat and round, are especially to be avoided for affected canes. An interesting little family is the PtcrophoridcB, peculiar in having the wings split into feath- ers or plumes. Occasionally the primaries have only a cleft that does not extend beyond the mid- dle, but sometimes they are split for the full length. The hind wings may be divided into from four to six feathers, the insects being therefore termed "plume moths," or " feather-wing moths.'' As a whole, few of the species are common, and I am acquainted with only one that is in any way injurious,—the "grape plume," The caterpillar of this is pale yel- lowish or nearly white, with little tubercles, from which rise tufts of pale hair similar to those of some Arctiids, or " woolly ; It lives in the tips of young shoots of grape, webbing up the. The grape plume, Oxyptilus peris-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsects, bookyear1906
