Insects injurious to fruits . said to seek out and devour large quantities of the eggs of thecurculio. Fia. 199. Two species of parasites are known to attack thelarva of this pest. One,known as the Sigalphiiscurcnlio parasite, SigalphusGureulionis Fitch, is a small^black, four-winged fly, rep-resented in Fig. 198, where a shows the male, and 6 thefemale. With her sharp ovipositor the female punctures the skin of the curculio larva, Fig. 200. j j -^ j and deposits an egg under-neath, which in due timeproduces a larva, as shownata. Fig. 199. When thecurculio larva is destroyedby the parasite, th
Insects injurious to fruits . said to seek out and devour large quantities of the eggs of thecurculio. Fia. 199. Two species of parasites are known to attack thelarva of this pest. One,known as the Sigalphiiscurcnlio parasite, SigalphusGureulionis Fitch, is a small^black, four-winged fly, rep-resented in Fig. 198, where a shows the male, and 6 thefemale. With her sharp ovipositor the female punctures the skin of the curculio larva, Fig. 200. j j -^ j and deposits an egg under-neath, which in due timeproduces a larva, as shownata. Fig. 199. When thecurculio larva is destroyedby the parasite, the latterencloses itself in a small,tough cocoon of yellowishsilk, 6, and then graduallyassumes the pupa state, as shown at c ; all these figures aremagnified. The other species, known as thePorizon curculio
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Keywords: ., bookcentury1900, bookdecade1900, bookidin, booksubjectinsectpests
