Losses to cotton, what to look for and where to find it, being one of a series of articles in relation to crops, their common diseases and insect pests to which they are subject . THE COTTON BOLL WEEVIL (fl) adult beetle; (h) pupa; {c) larva. Enlarged. measurement includes the snout, which is about one-half thelength of the body. The color (grayish or brownish) de-pends upon the time that may have elapsed after trans-. COTTON BOLL WEEVIL Late fall boll, showing how beetles hide between boll and inclosure. formation to the adult stage. The recently emerged in-dividuals are light yellowish in co
Losses to cotton, what to look for and where to find it, being one of a series of articles in relation to crops, their common diseases and insect pests to which they are subject . THE COTTON BOLL WEEVIL (fl) adult beetle; (h) pupa; {c) larva. Enlarged. measurement includes the snout, which is about one-half thelength of the body. The color (grayish or brownish) de-pends upon the time that may have elapsed after trans-. COTTON BOLL WEEVIL Late fall boll, showing how beetles hide between boll and inclosure. formation to the adult stage. The recently emerged in-dividuals are light yellowish in color, but pass to a gray ornearlv black shade in a few weeks time. In the field tlie most conspienons indication of thepresence of the boll weevil is the flaring and falling of greatnumbers of squares. However, unfavorable climatic con-ditions and careless cultivation fre(]uently cause muchshedding. If excessive shedding be noticed and the squaresupon being cut open show a white, curved grub that has fedupon the contents, there is little doubt that the l)oll weevilis the insect causing the damage. The boll weevil passes the winter in the adult the spring and throughout the fruiting season of cottonthe eggs are deposited by the female weevils in the cavitiesformed by eating into the fruit of the plant. The squares are greatly i)referred as food and as placesfor depositing eggs. As long as a large supply
Size: 1475px × 1695px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidlossestocott, bookyear1919
