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Image 89 of Annual report. 1908

Part of Kentucky Agricultural Experiment Station

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i 62 Bulletin No. 133. ‘ i I OTHER INSECTS ATTACKING APPLE. A. Besides the species mentioned a number of others of less im- j portance occur at times on the trees and some of the more common ` ’ of these are mentioned below. It will be noted that we have nearly g i all of the important apple pests occurring in the country. The apple I I maggot (Trypetu pommiclla) of the New England States has not, _» however, been observed here, excepting as its work is sometimes noticed in fruit brought to our market. The Yellow Swallow—tail Butterfly (Papilio glaucus) is common _ g everywhere in the State. Its larva sometimes occurs on apple, but —¤ 1 has never been troublesome. i The Ursula Butterfly (Basilarchia astyunax). The adult is _ often seen, but the 'larva is practically unknown. , I The Zebra Caterpillar (Mamestra. picta). The caterpillar is . _ common at times on various low—growing plants, alsike clover — among others. f Balsa. mulaua. A small gray moth which is rather common in ‘Kentucky. The larva gnaws apple leaves. The Winter Moth (Erauuis tiliuriu). Not very common in lg Kentucky at any time. l The Io Moth (Automcris io). This handsome moth produces ‘ i ' a green worm with branched stinging hairs, which is rather com- mon on corn in Kentucky. It is now and then seen eating apple A leaves. The White-lined Morning Sphinx (Dcilcphila liucatu). This . fine hawk—moth is common about flowers of evenings in Kentuclq. Its larva feeds on purslane and is said at times to attack apple. The Eyed Hawk Moth (Paouias cmcuccatus). A large reddish brown hawk moth with eyed hind wings. The larva is somewhat like the tobacco worm in shape. It is not common. ` _ THE APPLE TXVIG-BLIGHT. gh? (Due to Bacillus umylovorus). i M When apple trees are growing rapidly in the spring a sudden blighting of the tips of twigs occurs that soon leaves the trees with I numerous tufts of dead leaves, the rest continuing green and seem- p ' ingly in good condition. The disease is known as twig—blight be- t