. The sweet potato; a handbook for the practical grower. Sweet potatoes. 148 The Sweet Potato white; head pale brown; mouth-parts a brownish shade; a few delicate- hairs can be seen under the micro- scope. The larva is legless, although very thick leg pads are apparent (see Fig. 17). The length when grown is about % of an inch. Tho pupa is at first the same color as the larva, but before trans- formation to the adult be- comes considerably darker. The wing pads are short and narrow, folded over the un- der side of the body; the head and back fold down upon the breast; on the head are several s
. The sweet potato; a handbook for the practical grower. Sweet potatoes. 148 The Sweet Potato white; head pale brown; mouth-parts a brownish shade; a few delicate- hairs can be seen under the micro- scope. The larva is legless, although very thick leg pads are apparent (see Fig. 17). The length when grown is about % of an inch. Tho pupa is at first the same color as the larva, but before trans- formation to the adult be- comes considerably darker. The wing pads are short and narrow, folded over the un- der side of the body; the head and back fold down upon the breast; on the head are several small tubercles, ei^ch one bearing a slender spine; it is about % of an inch long. The pupa is not active, not partaking of food. The lower half of the body is mobile, enabling the pupa to turn about in its burrow or pupa b Figure 17.— The sweet potato weevil: a, larva; 6, dorsal and ventral views of pupa. Enlarged. Life history. While it is thought that the sweet potato weevil passes through a part of the winter in hibernation, it is active throughout the entire year in the Gulf states. Eggs, larva>, pup® and adults may be found throughout the winter over its entire Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hand, T. E; Cockerham, Kirby Lee, 1893-. New York, The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1921
