. Cotton or weevils. Boll weevil; Cotton. 6 MISC. PUBLICATION 3 5, XT. S. DEPT. OF AGRICULTURE flower bud the weevil, if a female, begins to lay eggs. This we call the beginning of another generation. It usually takes from two to three weeks, depending on the weather, for a generation to develop through the different stages of egg, larva, and pupa, to the adult form. There are several generations each year, made up of males and females in about equal numbers. THE DAMAGE A WEEVIL DOES The female weevil seems to like to lay her eggs in the flower bud of the cotton plant. She likes the bud much b
. Cotton or weevils. Boll weevil; Cotton. 6 MISC. PUBLICATION 3 5, XT. S. DEPT. OF AGRICULTURE flower bud the weevil, if a female, begins to lay eggs. This we call the beginning of another generation. It usually takes from two to three weeks, depending on the weather, for a generation to develop through the different stages of egg, larva, and pupa, to the adult form. There are several generations each year, made up of males and females in about equal numbers. THE DAMAGE A WEEVIL DOES The female weevil seems to like to lay her eggs in the flower bud of the cotton plant. She likes the bud much better than she does any other part of the plant. Sometimes there are not enough flower buds for all the eggs and then the female has to hunt some other. Fig. 4.—This shows bow the three outside leaves, or bracts, flare out when the inside of the flower bud, or square, has been eaten away by the boll-weevil grub. A and (' are healthy flower buds. B is a flared bud which has been eaten out by a weevil grub. About two-thirds natural size place to put them. If it is late enough in the season for the plant to have bolls, she will lay her eggs in these. A boll, you understand, is the fruit of the plant and is what the flower bud grows into. The boll is not a fruit such as man can eat. This word "fruit" is hard to understand sometimes because we use it in two different ways. Some speak of fruit as that part of a plant that one can eat. A botanist—that is, a man who studies plants— calls the fruit that part of the plant that makes the seed. Many plants first form buds which grow into flowers and then these make seeds. A botanist calls this the fruit of the plant, regardless of whether we can eat it or not. Many plants, such as the ferns and mosses, do not make fruit in this way, but most of our common plants do. After the flower buds on the cotton plant open into blossoms the bright, showy parts soon fade and drop off. What is left after the. Please note that these imag
Size: 1866px × 1340px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashingtondcusdept
