Insect pests of farm, garden and orchard . Fig. 194.—The cotton boll weevil; eggs among the anthers at points indi-cated by arrows, the cross-section at the right showing opening througliwhich egg was deposited—greatly enlarged. The weevils commence to emerge from hibernation soon aftercotton is up and continue to emerge until the cotton commencesto square freely. During the spring the beetles feed on the foliage. INSECTS INJURIOUS TO COTTON 265 particularly in tlic tender terminals, and as soon as squares areformed the females commence to lay their eggs in them. Eachfemale lays an average of
Insect pests of farm, garden and orchard . Fig. 194.—The cotton boll weevil; eggs among the anthers at points indi-cated by arrows, the cross-section at the right showing opening througliwhich egg was deposited—greatly enlarged. The weevils commence to emerge from hibernation soon aftercotton is up and continue to emerge until the cotton commencesto square freely. During the spring the beetles feed on the foliage. INSECTS INJURIOUS TO COTTON 265 particularly in tlic tender terminals, and as soon as squares areformed the females commence to lay their eggs in them. Eachfemale lays an average of about 140 eggs, la}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
Size: 1199px × 2085px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1912
