THE LOCAL PLANT DOCTOR. 39 



particular advantage in the commercial preparation and not much 

 difference in the various brands. 



The cucumber wilt. A good deal of trouble comes from the 

 cucumber vines wilting and dying down almost in a day. This 

 wilt is a bacterial disease and is carried by squash bugs and beetles. 

 The bacteria are introduced into the veins and gradually spread 

 over the whole leaf. The best remedy is to get into the garden 

 the first thing in the morning and crush the beetles on the leaf, 

 then take out the diseased leaves and burn. Spraying is of no 

 value whatever. 



Cedar rust on quinces. The cedar rust on quinces comes so 

 very seldom, about once in every ten years, that there have been 

 no particular experiments in regard to it. 



Anthracnose of beans. Bean seed in the market is never with- 

 out disease. The only way to get clean seed is to pick it out 

 yourself. Buy the variety you want to grow, plant and save the 

 pods which have no spots on the sides. Select and plant the seeds 

 back in the garden. The disease is not in the soil, it is in the seed. 

 The fungus consists of spores produced at the surfaces of the black 

 spots. From clean seed you can get clean crops. Avoid working 

 when it is wet and you will get less anthracnose. After a heavy 

 rain or dew the spores may easily become attached to insects which 

 carry them to the healthy plants. There is no uniform difference 

 in the susceptibility to this disease of wax beans and green beans. 



The question was asked if soaking bean seed in formalin or 

 corrosive sublimate would rid them of anthracnose. To which 

 the Lecturer replied that this treatment was not very satisfactory. 

 The fungus is inside the seed coat and while soaking may be of 

 some help, still the anthracnose is inside the bean. To get good 

 results and to wipe out the disease the best way was through the 

 careful selection of good clean seed. 



Mildew of gooseberry. Potassium sulfide or lime-sulfur diluted 

 1 to 30 should control the mildew on the gooseberry. 



Mildew on roses. The lime-sulfur spray ought to prove as 

 effective as any fungicide. 



The rust on hollyhocks. The spores of the hollyhock rust are 

 produced very abundantly and so it is necessary to spray frequently 

 with Bordeaux mixture. Cut off the diseased leaves in the fall 



