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62 > Image 62 of Annual report. 1908

Part of Kentucky Agricultural Experiment Station

. r l _A Spraying Apple Trees. 41 shrubs andsmall trees, this is a very satisfactory method of getting l rid of web-worms, and under some circumstances it can most con- . A veniently be used in the_ orchard. A Besides the Empusa noted as destructive to web-worms, sev- L eral species of Hymenopterous parasites, including a minute egg- i parasite (Telenomuns biyidus) have been described as attacking the y l-. webworm. The Spined Soldier, Bug (Padisus spinosus) is also, i i at times, useful by destroying the caterpillars. THE TUSSOCK CATERPILLAR. I (Hema-racampa Zeucostigma). l A singular caterpillar with two long tufts of black hairs aris- } ing one at each side of the first body division (prothorax) and a il l similar one at the hind end of the body. They feed singly, and i l finally produce small moths, the male broadwinged, the female g ] wingless. 5 The Tussock Caterpillar became known to some Kentuckians for the first time during the summer of 1907. It was very common 1 i` then, working apparently in conjunction with the fall webworm y in destroying the leaves of fruit and shade trees. It is present Q l every season, but ordinarily does but little harm. Two broods de- l velop, the first appearing in April and May, the second, about the jl first of August. A mass of eggs observed in 1905 was placed on a privet hedge August 1 to 5. The eggs began hatching August 14, and all were out August 18. The larvae were grown and began pupating Sep- tember 15. The first adult emerged in confinement September 29 and others continued to come forth until October 2. In 1893, larvae in confinement began to pupate September 5, and all had pupatcd V September 11. September 13, adults began to emerge and con- y iiimled to come out until September 22. In the latter part of Sep- tember (September 26 and later) the adults of the second brood emerge and place their eggs about the trees. The female moth is Wingless and after emerging does not leave her loose silk cocoon. The eggs, covered with frothy material, are placed upon the outside of F this, where they remain clinging to a twig or to bark of the trunk. When leaves are gone from the trees. a search of plum or apple trees in an orchard will almost invariably show some of these masses. 1 I