. Annual report of the Missouri State Board of Agriculture. Missouri. State Board of Agriculture; Agriculture -- Missouri. INSECTS INJURIOUS TO CORN. 333. Fig. 71.—The Grain Weevil, C'alandra granaria: a, larva; b, pupa; c ,adult. All greatly en- larged, except the outline of small beetle just above the large one. (From Howard, U. S. Dept. Agric.) you will be able to obtain a good idea of the appearance of the insect when seen under a magnifying glass, and just above it the outline of one of the beetles natural size. These beetles, fortunately for the agriculturist, infest the corn only when i
. Annual report of the Missouri State Board of Agriculture. Missouri. State Board of Agriculture; Agriculture -- Missouri. INSECTS INJURIOUS TO CORN. 333. Fig. 71.—The Grain Weevil, C'alandra granaria: a, larva; b, pupa; c ,adult. All greatly en- larged, except the outline of small beetle just above the large one. (From Howard, U. S. Dept. Agric.) you will be able to obtain a good idea of the appearance of the insect when seen under a magnifying glass, and just above it the outline of one of the beetles natural size. These beetles, fortunately for the agriculturist, infest the corn only when it is stored, and will not be found infesting it in the field. These beetles eat holes in the grain for food purposes as well as for depositing their eggs, which they push down in some of the holes which they have eaten. The lar- vae hatching from these eggs are small, footless, fat, grub-like creatures, one of which is represented, greatly magnified, in figure 71, a. These larvae feed within the ker- nel, mining it out, and when they become full grown transform to the pupae stage within the kernel, similar to the grain moth previously described, but not, however, by first making a little cocoon, as do the moths. Presently these pupae transform to the adult beetles, and then they eat their way out of the grain and lay their eggs for another brood. It requires about six weeks from the time the egg is deposited until the adult stage is attained. These insects breed generation after generation in the stored corn, and under favorable conditions in this State we find upwards of five broods a year. These insects multiply very rapidly, the adult female beetle laying a great many eggs and laying these during quite a long period. These beetles are also much stronger and more powerful than the grain moth, and for that reason are able to escape from the stored corn at greater depths. For this reason also they are able to do more injury. REMEDIES. The Angoumois grain moth and the grain we
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