BULLETIN 150.] [JULY, 1906. 



Ontario Department of Agriculture. 



ONTARIO AGRICULTURAL COLLEGE AND EXPERIMENTAL FARM 



THE COMMON FUNGUS AND INSECT PESTS OF 

 GROWING VEGETABLE CROPS. 



By Wm. Lochhead and T. D. Jarvis. 



INTRODUCTION. 



In the following: pages an attempt is made to describe concisely the 

 common fungus and insect enemies of vegetable crops, and to state briefly 

 the best methods of controlling these pests. It is believed that the pub- 

 lication of such information in bulletin form will fill a long-felt want. 

 While criticism may, perhaps, be made of some of the treatments recom- 

 mended, to the effect that they are too expensive, too burdensome, or 

 but partially effective, it can at least be said that they are the best that 

 up to the present have been devised. It is true that with some vegetable 

 crops the returns are so small that every means must be taken to reduce 

 the cost of growing and marketing the crop. As a consequence, some 

 growers will, perhaps, prefer to replant rather than practise the treat- 

 ments recommended in this bulletin. 



Experience will, we are sure, convince the majority of growers that 

 spraying is, after all, a cheap form of crop insurance. It may be true 

 that with some diseases only a few plants die, and the grower does not 

 lose much, yet it often happens that the disease destroys practically the 

 whole crop, and the grower is left without anything to show for his 

 work. The spray-pump should be in evidence in every vegetable gar- 

 den, and to get the best results from spraying, the following rules should 

 be followed as closely as possible : — 



i. Buy the best spray-pump outfit in the market. 



2. Have stock solutions of Bordeaux and other common substances 

 in readiness for spraying. 



3. Spray thoroughly and intelligently, i.e., know the habits of the 

 fungi and insects, the preparation of the best remedies, and the best time 

 for the application of the remedies. It should be remembered that pre- 

 vention of fungus disease is possible, but their cure is hardly practicable. 



