. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. BEANS BEANS 211 along the veins, which become brownish and dead. The blade itself may often become affected. If the attack develops late in the season, it is on the pods that it becomes most characteristic and destructive. Here it forms large, dark brown sunken spots in the tissue of the pods. The spores of the fungus may often be seen as a tiny pink mass at the center of these spots or pits. The dis- ease gradually works through the pods, and, at- tacking
. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. BEANS BEANS 211 along the veins, which become brownish and dead. The blade itself may often become affected. If the attack develops late in the season, it is on the pods that it becomes most characteristic and destructive. Here it forms large, dark brown sunken spots in the tissue of the pods. The spores of the fungus may often be seen as a tiny pink mass at the center of these spots or pits. The dis- ease gradually works through the pods, and, at- tacking the seeds, forms pits or discolored places in them. When the seeds are dried the fungus becomes dormant, only to become active again the next season, when the diseased cotyledons are lifted above the soil on the growing stalks. Diseased seed usually may be recognized by the discolored areas on the coat and by the shriveled condition. Weather conditions do not cause or originate bean anthracnose, but they have very much to do with its development and destructiveness. The spores are held together by a gummy substance which is easily dissolved in water, permitting them to be disseminated to healthy plants by means of insects, tools of tillage and in other ways. It is for this reason that tilling beans while wet with dew or rain almost always results in marked increase of anthracnose. The treatment for anthracnose must be pre- ventive rather than curative. Below are given what are now considered to be the best means of controlling this trouble : (1) Plant clean seed. If possible, secure seed from fields known to be free from the anthracnose. If seed from diseased fields must be planted, it should be hand-sorted carefully, and all seeds not perfect and bright should be rejected. (2) Go over the field just after the beans are up, and carefully remove and burn all diseased seed- lings. If left on the ground they will serve as centers of infection for the growing plants. quarts water;
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectagriculture, bookyear
