. Le livre du maïs : un traité complet sur la culture, la commercialisation et les utilisations du maïs en Amérique latine et ailleurs, pour les agriculteurs, les négociants, les fabricants et autres : un manuel complet sur la production, la vente, l'utilisation et du commerce des cultures de plus grande du monde . Le maïs. 25O LE LIVRE DE MAÏS lorsque le temps est frais et humide au printemps après le plant de maïs, de sorte que la semence est ramollie dans le sol longtemps sans la germination, il est particulièrement redevable à certains types de blessures, et c'est à ces conditions que la mouche à tête noire semble le plus susceptible d'affecter. Grain pourrissant est sans aucun doute préféré. Il

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. 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 . Corn. 25O THE BOOK OF CORN When the spring is cool and wet after corn plant- ing, so that the softened seed lies long in the ground without sprouting, it is especially liable to certain kinds of injury, and it is under these conditions that the black-headed maggot seems most likely to affect it. Rotting grain is undoubtedly preferred. It has occa- sionally been seen to infest kernels that had begun to grow. It lives normally in old sod, feeding chiefly on decaying vegetation there, and will be found in notice- able numbers in corn fields only where the field was in grass the preceding year. These maggots penetrate and hollow out the kernel, often leaving nothing more. Fig 61—Seed Corn Injured by Seed Corn Maggot ' (After Forbes) than an empty hull. Several of them may infest a single grain. They are slender, footless white mag- gots, except that the head is jet black, about one-third of an inch long when full grown and of nearly uni- form diameter throughout. The body is soft and flexible and the movements of the maggot are slug- gish. The species is very common. In his observations, Professor F. H. Chittenden of the United States department of agriculture says that one of the best means of deterring the parent flies from depositing their eggs consists in sand soaked in kerosene, one cupful to a bucket of dry sand, placed at the base of the plants, along the rows. This also kills young larvae that might attempt to work through the mixture. Fertilizers, preferably kainit and nitratz. 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 work.. Myrick, H

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