Insects injurious to fruits . destroyed. Fall plo^ghing hasbeen recommended to destroy the chrysalids by turning themup, when they are likely to be either killed by exposure ordevoured by birds. Hogs also are very useful in destroyingthis pest by rooting up the chrysalids and eating them. These insects have many natural enemies. A small mite,Nothrus ovivorus Packard (Fig. 63), destroys the eggs. Aminute parasitic fly deposits her eggswithin the eggs of the canker-worm anddestroys them. In the larval state theyare preyed on by a small four-wingedfly, a species of Microgaster, which, afterhaving
Insects injurious to fruits . destroyed. Fall plo^ghing hasbeen recommended to destroy the chrysalids by turning themup, when they are likely to be either killed by exposure ordevoured by birds. Hogs also are very useful in destroyingthis pest by rooting up the chrysalids and eating them. These insects have many natural enemies. A small mite,Nothrus ovivorus Packard (Fig. 63), destroys the eggs. Aminute parasitic fly deposits her eggswithin the eggs of the canker-worm anddestroys them. In the larval state theyare preyed on by a small four-wingedfly, a species of Microgaster, which, afterhaving fed upon its victim to full growth,eats its v/ay out, and constructs a smalloval white cocoon attached to the bodyof the caterpillar. A sj)ecies of Tachina,a two-winged fly similar to Fig. 46, , is also a parasite on these worms. Predaceous insectsalso feed upon them, especially the Green Caterpillar-hunter(Fig. 47), the Copper-spotted Calosoma (Fig. 48), and theRapacious Soldier-bug, Slnea diadema (Say) (Fig. 64). The. Fig. 64.
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Keywords: ., bookcentury1900, bookdecade1900, bookidin, booksubjectinsectpests
