. Manual of fruit insects. TS 433 in Figure 374. A little flap is cut from the leaf and graduallypulled over and down and fastened to the leaf by silken inside is thenlined with whitesilk, thus forming asnug cocoon. Atthe edge of a leaf,it is necessary tocut the flap only atthe ends; but whenthe cocoon is madeaway from the edge,the flap must be cutalong one side also,and frequently thecaterpillar cuts alongwhere the edge ofthe flap is to meetthe edge of the leafand pulls up the leafa little to meet theflap. Two to fourdays after buildingthe cocoon the cat-erpillar transformsinto a
. Manual of fruit insects. TS 433 in Figure 374. A little flap is cut from the leaf and graduallypulled over and down and fastened to the leaf by silken inside is thenlined with whitesilk, thus forming asnug cocoon. Atthe edge of a leaf,it is necessary tocut the flap only atthe ends; but whenthe cocoon is madeaway from the edge,the flap must be cutalong one side also,and frequently thecaterpillar cuts alongwhere the edge ofthe flap is to meetthe edge of the leafand pulls up the leafa little to meet theflap. Two to fourdays after buildingthe cocoon the cat-erpillar transformsinto a light greenish-brown pupa (). Many of thespring brood of cat-erpillars pupate dur-ing the first week in July and in 12 to 14 days the purplish brown moths havingan expanse of a little less than half an inch begin to emerge(Fig. 369). By means of the spines on its back the pupa is2f ^^^^^^^^^^^^- W^ ^■^^^^^H B^H ^^^^ohi^^^^^^^i Fig. 372. — Grape-berry moth caterpillarsworking among young fruits. 434 FRUIT INSECTS. enabled to work itsway nearly out ofone end of its co-coon and the moththen emerges, leav-ing the empty pupaskin projecting fromthe cocoon. TheseJuly moths lay theireggs on the skin ofthe green berries oron the stems (). Fig. 373. — Grape-berry moth caterpillars (xS^). During July and August all of the four stages of the grape-berry moth can befound in the vineyards at the same time, for the different broodsoverlap. The mostconspicuous and de-structive work is doneby the second andmost numerousbrood of caterpillarsworking in the grow-ing green grapes inJuly and brood of cater-pillars lives insidethe berries on thepulp and seeds,often going into asecond or third berry,fastening them to-gether with a few Fig. 374^-Grape leaf showing cocoons in the° making and finished by grape-berry moth cater- silken threads (Fig. pillars.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1915
