PLANT DISEASES. 



251 



Control of Brown Rot. Remove as far as possible 

 the source of infection by knocking mummied fruit 

 from the trees; by clearing the ground of rotted fruit; 

 by spraying the trees with a good fungicide in early 

 spring before the buds swell; and by picking decayed 

 fruit as soon as it appears. Lessen the chances of in- 



fection taking place 

 by planting non-sus- 

 ceptible varieties; by 

 pruning so as to let 

 in light and air to 

 all fruit-bearing 

 branches; by thinning 

 the young fruit; by 

 keeping in check the 

 curculio and other in- 

 sects; and perhaps by 

 spraying the fruit. 

 Most fungicides are unsafe to use on peach and 

 Japanese plum in foliage; but the self-boiled lime- 

 sulphur wash seems to be a safe one for this purpose, 

 and gives promise of being especially useful in the 

 control of brown rot. 



Grape Black Rot. Affected grape berries show at 

 first brown decayed spots; finally the berries become 



dark and shriveled and 

 rough with minute 

 spore - producing pim- 

 ples. The fungus also 

 attacks leaves, tendrils, 

 and even the canes of 

 the grape; and these as 

 well as the shriveled 

 berries are sources of 

 new infection. Lessen sources of infection for the 

 next season by plowing under old leaves and berries. 



BROWN KOT OF PEACH. 



GRAPE BLACK ROT. 



