357 ^ 



ONION. 



or blight as it is commonly called is a fimgous disease, much like 

 Mildew. the blight of potatoes. Spray with Bordeaux, 5-5-50, begin- 

 ning when the plants show three leaves. Repeat every ten days 



until crop is harvested. Add one gallon sticker (see page 362) to every 50 gallons 



of the mixture. It is useless to begin spraying after the disease appears. See 



Cornell Bulletin 218. 



This can be detected by the black pustules'on the leaves~and 

 Smut bulbs. It is troublesome only where onions are grown exten- 



sively; it may attack the seedlings killing them outright, or 

 may appear on mature bulbs in fall. Onions from sets or those 



started in clean soil and transplanted seldom suffer. Practice crop rotation. 



Drill into the rows when planting seed, 100 lbs. sulfur and 50 lbs. air-slaked lime 



mixed, to the acre. See Geneva Bulletin 182. 



PEACH. 



is the most serious fungous disease of stone fruits in this state 

 Brown-rot and one of the most difficult to control. Plant resistant varieties. 



Prune the trees so as to let 

 in sunlight and air. Tlun the fruit well. As 

 often as possible pick and destroy all rotten 

 fruits. In the fall destroy aU fruits remaining 

 on the trees and on the ground. Spray with 

 Bordeaux mixture before the buds break. 

 Owing to danger of injuring the foliage later 

 applications of copper compounds are not 

 recommended. The seU-boiled lime-suUur 

 wash (see page 362) is now being advocated 

 for the control of this and other diseases of 

 peach. In some experiments carried on by 

 the U. S. Dept. Agr. 1907 the loss from this 

 disease was reduced from 73% on unsprayed 

 trees to about 10% on sprayed rows. The 

 new remedy is at least worth a trial. Spray 

 with self-boiled lime-sulfur wash, 10-15-50. 

 First application when fruit is about the size 

 of the end of your thumb. Repeat every two 

 weeks until about two weeks before fruit 

 ripens. See American Pomological Society 

 Report 1907, also Report Missouri Horti- 

 cultural Society, 1907. (Fig. 170.) 



is a fungous disease in which the leaves become swollen and 

 Leaf-curl distorted in spring and drop during June and July. ElBerta is 



an especially susceptible variety. Easily and completely con- 

 troUed by spraying the trees once, before the buds swell with Bordeaux, 5-5-5°. 

 or with the Ume-sulf ur mixtures used for San Jos6 scale (see under fungicide) . See 

 Cornell Bulletins 164 and 180, Michigan Special Bulletins 27 and 30. Copper 

 sulfate 2 lbs. 



170 Mummies on peach tree, 

 the result of brown-rot. 



