THE MONTHLY BULLETIN. 



481 



tlie process of fumigation is going on. Carbon bisulfide is very explo- 

 sive and inflammable, and care should be taken that it is not placed 

 near any flame. One pound of this liquid to every 30 bushels of grain, 

 if the bin is sufficiently tight and the temperature above 70 degrees, is 

 recommended in the circular. Another pound should be used for every 

 200 cubic feet of space above the grain in the bin. Although the liquid 

 may be thrown directly on the grain without injury, better results 

 may be obtained by pouring into shallow dishes. If very large bins are 

 to be fumigated, the liquid may be poured through a pipe, in order to 

 get the material near the center and bottom. The end of the pipe is 

 plugged with cotton or other material before pushing it down through 

 the grain, the plug being removed by means of a rod which is thrust 

 through the pipe. Do not fumigate below 60"^ Fahrenheit. 



Fig. 104. — The granery weevil, Calandra granaria Linn. Adults on grains 

 of wheat. Enlarged four times. (After Bssig, Ini. and Ben. Ins. of Cal., 

 revised edition.) 



PLANT DISEASES. 

 Peach Blight. 



What the Disease Is. — Peach blight is a destructive fungous disease 

 occurring in California. The effect of the fungus is to kill the buds on 

 the fruiting wood, to produce spots on the young twigs, and to cause the 

 fruit to drop and to retard the development of the leaves. Very often a 

 considerable amount of gum exudes from the dead spots. 



