INSECTS, DISEASES, REMEDIES 



53 



the plants are affected after the leaves are well de- 

 veloped these, too, will show the disease, especially 

 on the underside along the veins which become 

 brownish and dead. It is on the pods, however, 

 that it becomes most characteristic and destructive, 

 especially if the attack conies late in the season. 

 Here it forms large dark brown sunken spots in the 

 tissue. At the center of these pits a tiny pink mass 

 may often be observed. These are the spores or 



cu c 



FIG. 1 6 BEAN WEEVIL. (a), THE BEETLE; (b) , THE 



LARVA; (c), THE PUPA. SPECIMENS MUCH EN- 

 LARGED. 



seed of the fungus. Where the beans are left on the 

 vines to ripen the disease gradually works through 

 the pod and attacks the seed, forming pits or dis- 

 colored places in the bean. Diseased seed may be 

 detected by the discolored areas on the coat and are 

 usually imperfect, shriveled or light in weight. 



The anthracnose of beans is not caused directly by 

 weather conditions. There will be no anthracnose 

 if the fungus is not present in the soil or in the 

 beans themselves when they are planted, or if it is 



