Insect pests of farm, garden and orchard . ing four or five a female drills a small cavity in the square and in it depositsa ^small oval white egg, which hatches in about three grub feeds upon the embryo flower, which usually failsto develop, and the infested square generally falls to the from seven to twelve days the larva is full grown and changesto the pupa, which stage lasts from three to five days. Thus. Fig. 1J5.—The cotton boll weevil, larva and pupa—enlarged. from egg to adult requires from two to three weeks, thoughclimatic conditions cause considerable var
Insect pests of farm, garden and orchard . ing four or five a female drills a small cavity in the square and in it depositsa ^small oval white egg, which hatches in about three grub feeds upon the embryo flower, which usually failsto develop, and the infested square generally falls to the from seven to twelve days the larva is full grown and changesto the pupa, which stage lasts from three to five days. Thus. Fig. 1J5.—The cotton boll weevil, larva and pupa—enlarged. from egg to adult requires from two to three weeks, thoughclimatic conditions cause considerable variation in the lengthof time. The larva is a footless, white grub, with brown head,which lies curled up in the stjuare as shown in Fig. 195, wherethe soft white piq^a is also found. The adult weevils feed entirelyduring the daA. Their length of life depends upon variousconditions, but in the sunnner season the majority do not liveover sixty days, while during the cooler part of the year thosewhich hibernate live five or six months. Many squares aredestroyed V)y tlw feeding punctures of the weevils. The malesfeed upon the squares and bolls without moving until the foodbegins to deteriorate. The females refrain from depositing insquares visited by other females. This applies throughoutmost of the season, but late in the fall, when all the fruit hasbecome infested, several eggs may l)e placed in a single square 266 INSECT PESTS
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1912
