INSECTS AND PREVENTIVES 



gas is very deadly. It is better, perhaps, to use 

 the above proportion to 4,000 cubic feet to start 

 with, with an exposure of six minutes, and if not 

 successful try it stronger next time. I have used 

 the above formula successfully on a tomato-house 

 (one ounce to 4,000 cubic feet) and kept the 

 house closed all night without injuring the most 

 tender growth. 



But for red spider there is no method of killing 

 the spider and saving the crop. The best way is 

 to check him all you can. Moisture is a check 

 to breeding, but it is not practicable to spray cucum- 

 ber vines too much. I have found the best way to 

 be to cyanide after the crop is through bearing, 

 using a proportion of one ounce to 200 cubic feet, 

 and keeping the house closed all night. This 

 should be repeated in seven days to kill the little 

 ones that have hatched out. And further, keep 

 your houses clean. Keep them painted every 

 year, and don't grow cucumbers in the fall, for if you 

 do you are bound to have spiders in the spring. 



FUNGI AND PLANT DISEASES. PREVEN- 

 TIVES. Disease in plants manifests itself in 

 various forms, amongst which we recognize two 

 distinct classes; one due to the presence of animal 



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