y 



and spring, but it is not advisable to cut in the growing season, as 

 fresh cases may be constantly occurring, and these, owing to lack of 

 sufficient development, would not be seen. 



The best time for cutting out affected branches is towards the 

 fall, or when the trees have stopped forming new wood, when most 

 of the blight has developed, and when the contrast between the dis- 

 colored leaves and branches and healthy tissues is easily seen 



Trees should be carefully inspected for blight during the winter, 

 and in spring before the blossoms come out, in order to destroy any 

 aflected parts that may have been missed at previous inspection. 



All trees of the pome family in the vicinity should be examined 

 as well, as these, if blighted, may serve to reinfect an orchard which 

 has been carefully treated. 



In cases where the bark of the trunk is affected, it can be cut 

 out and the wound covered with a lead and oil paint. The cut sur- 

 face of the branches over one-half inch in diameter should also be 

 painted. 



A BACTERIAL DISEASE OF BEANS. 



Lima beans are not grown commercially in Ontario. Wax beans 

 are grown in gardens and for canning. Field beans are grown exten- 

 sively in the lake counties of Essex, Kent and Elgin, Blenheim and 

 Ridgetown being centres of the bean industry. 



A bacterial disease of beans is causing loss and injury in nearby 

 bean-growing sections of the United States, from New Jersey to 

 Michig-an, and it is probable that it occurs in this Province. We have 

 made some study of the disease under field conditions in Michigan 

 and in our laboratory at the College. 



The disease usually begins at the margin of the leaf, or where 

 the leaf has been injured or torn by insects, wind, or hail. Here a 

 yellow spot appears, and the green of the leaf is destroyed. The 

 spot increases rather slowly, and the diseased tissues become brown, 

 especially the minute veins, which become almost black. 



This diseased part of the blade turns dry and brittle in the sun, 

 and soft in the rain, and it may be broken away, leaving ragged holes 

 and torn margins. The whole leaf may die and fall to the ground or 

 remain withered on the stem. The disease enters the stem by way 

 of the leaf stalk, and advances in the stem to other leaves and to the 

 young pods. In severe cases the pod may wilt and die, and, on 

 opening it, the half-growm seeds will be found shrivelled and dis- 



