July 29, 1892,] 



SCIENCE. 



69 



Spraying Crops; Why, When, and How. ' By Clarence M. 

 Weed. Illuftrated New York, Rural Publishing Com- 

 pany. llOp. 



The author of this little book, formerly connectefl with the 

 Ohio Agricultural Experiment Station, is now at the New Hamp- 

 shire Station in the capacity of Entomoloaist. He has given in 

 a condensed form an account of many insect and fungous foes of 

 various fruits, trees, and vegetables. The informitioti in regard 

 to the former is much fuller than in regard to the latter, which is 

 naturally to be expected from an entomologist. Quite full his- 

 tories are given of the codling moth, the curculio. tlie" canker 

 worm, and the tent catterpillar. The only fungous disease treated 

 with any degree of fulness is downy mildew or brown rot of 

 grapes. The formulae for the principal fungicides and insecticides 

 are giren, together with instructions how to combine the two. 

 The few pngcs devoted to spraying are scarcely adequate to give a 

 beginner an idea of what to do or how to go to work to do it ; and in 

 this respect the book is incomplete. Among the plants whose in- 

 sect and fungous enemies are discussed we find the apple, peich, 

 pear, plum, cherry, strawberry, currant, gooseberry, grape, rasp- 



berry, rose, potato, cabbage, and others. Some of the worst fun- 

 gous diseases are not mentioned, such as oat and wheat smut, 

 apple rust, peach yellows, pear and apple blight, etc. It cannot, 

 however, be expected that in so small a book everything could be 

 mentioned and described. It is, too, not improbable, that as 

 these diseases cannot be prevented by spraying, that they are 

 omitted intentionally. On the whole the book is one which wilt 

 prove useful to the general fruit grower. Joseph F. James. 



D. C. Heath & Co. have in press, and will soon issue '■ Ele- 

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 interesting and attractive as possible to the student. 



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