
540 Report oF THE HorTICULTURIST OF THE 
When Bordeaux mixture is applied with a knapsack pump the 
motion of the body will keep the mixture well stirred, but when a ‘ 
barrel-pump is used, the motion of the cart is not sufficient to pre- 
vent the copper compounds from settling to the bottom. When 
this occurs, part of the mixture is applied in a very weak form 
and a part has an excessive amount of copper. Finally when the 
sediment is discharged it often clogs the nozzle and causes much 
trouble. These difficulties are best overcome by arranging some 
kind of dash or agitator so that with every stroke of the pump — 
the whole mixture is thoroughly stirred. An agitator is even 
more necessary for the application of Paris green than for Bor-- 
deaux mixture. Some manufacturers now supply large pumps 
with agitators. 
The true Vermorel nozzle is considered best for aypply- 
ing the Bordeaux mixture, better than the modifications of it 
which are sometimes offered. Success in treating the anthracnose — 
- as above recommended depends very much upon the kind of 
nozzle used and the care taken to cover all parts of the plants 
- with the spray. The nozzle should throw a very fine spray. — 
SpR¥AD OF DISEASE ON GATHERED pops.— Experiments with 
gathered pods on snap beans from diseased plants proved beyond — 
question that pods. which were apparently sound and without 
blemish when first gathered may become badly spotted in two or 
three days time. It was also proven by inoculation that unblem- 
ished pods may soon become infected by spores from diseased = 
pods. It was very easy to see that shipments of snap beans gath- R 
ered from diseased plants might be sent from the producer in — 
NE ees ~— 
ee PS Se 

apparently good condition and yet become very badly spotted by 
the time they reached the consumer. _ ‘ 
DISCUSSION OF THE FUNGUS AND DETAILS OF | : 
EXPERIMENTS. oe a 
ro 
at 
Bean anthracnose is so named because of the sunken spots or 
“ulcers” formed by the disease on the pods or other succulent — 
tissue. It is due to a parasitic fungus known as Colletotrichum> 
Lindemuthianum (Sacc. and Magn.), Briosi and Cavara, but was 




