. The book of corn; a complete treatise upon the culture, marketing and uses of maize in America and elsewhere, for farmers, dealers, manufacturers and others--a comprehensive manual upon the production, sale, use and commerce of the world's greatest crop . d the larva devours the interior of thegrain and finally undergoes its transformation withinthe hull. In wheat and other small grains a singlelarva inhabits a kernel, but in corn several individualsmay inhabit the same kernel. About six weeks areusually required for the transformation from egg toadult. There are probably four or five broods
. The book of corn; a complete treatise upon the culture, marketing and uses of maize in America and elsewhere, for farmers, dealers, manufacturers and others--a comprehensive manual upon the production, sale, use and commerce of the world's greatest crop . d the larva devours the interior of thegrain and finally undergoes its transformation withinthe hull. In wheat and other small grains a singlelarva inhabits a kernel, but in corn several individualsmay inhabit the same kernel. About six weeks areusually required for the transformation from egg toadult. There are probably four or five broods in thenorthern states, and six or more in the southern. Theadult beetles do a great deal of damage by gnawinginto the kernels. The rice weevil, another common species, was firstfound in rice and was given this popular name by itsdiscoverer It occurs in every state and territory and 278 THE BOOK OF CORN occasionally invades Canada and Alaska. It is mosttroublesome in the southern states, where it is com-monly, but erroneously called the black cargoes of grain have frequently been destroyedduring transportation by this insect. The annuallosses by it are very great in India, Mexico, SouthAmerica and other tropical countries. It. resembles. Fig 76—Grain Weevils Calandra gra?iaria : a, beetle; b, larva; c, pupa; d, C. oryza beetle—all enlarged (after Chittenden) the granary weevil in size and in general appearance,but has well developed wings. It is a dull brown andits wing covers are ornamented with four more or lessdistinct red spots. The larva and pupa are similar tothose of the granary weevil. Although the rice weevilfeeds upon rice, it attacks a great variety of othercereals, particularly corn and wheat. CORN PESTS AND DISEASES 279 There is but one standard remedy for all storedgrain insect pests, and that is scrupulous cleanlinesssupplemented by the free use of bisulphid of bisulphid is usually evaporated in vessels con-taining one-fourth or one-ha
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