129 



paper, dealing with an important group of citrus pests. The 

 orange thrips were found, not only on citrus, but also on pome- 

 granates, grape, California pepper tree, dock, pursland, and a 

 wide variety of other plants. 



The Unification of Reducing Sugar Methods, (A Correction), 

 by Percy II. Walker, Chief, Contracts Laboratory, U. S. 

 Dept. Agric. Bur. of Chemistry, Circular 82, pp. 6. 



Grape Propagation. Pruning, and Training, by (ieorge C. Hus- 

 mann, pomologist in charge (^f viticultural investigations, 

 U. S. Dept. Agric. h'armers' Bulletin 471, ])p. 29, figs. 30. 



The Avocado in Haivaii. by J. E. Higgins, C. J. Hunn and V". S. 

 Holt. Hawaii Agric. Expt. Station, Bui. 25, 48 pp., 7 plates, 

 13 figs. 1911. 



This excellent bulletin is heartily welcomed by all in Hawaii 

 who are interested in local horticultural problems. It fills a long- 

 waiting gap in the scant literature of tropical fruit production. 

 The text is well classified and fully illustrated. The main sec- 

 tions are : botany and history of the avocado ; natural and cul- 

 tural requirements ; control of insects and diseases ; the crop and 

 its marketing ; breeding the avocado ; the avocado as food ; vari- 

 eties. The sections of particular fulness and interest are those 

 dealing with propagation, marketing, methods of serving, and 

 descriptions of varieties. The blank or form for describing vari- 

 eties is unusually complete. Of the many Hawaiian varieties, 

 about sixty-five have been described by IMr. C. J. Hunn. Experi- 

 ments with sprays are now in progress, to control scale (Psuedo- 

 coccus), green caterpillar (Amorbia), and fungus (Gloeos- 

 porium). 



The following extract from the introduction illustrates the pres- 

 ent market situation, " * * ='' the growing of this fruit is 

 only an infant industry. For a long time it was impossible to 

 develop it because of the lack of a ready means of rapidly mul- 

 tiplying a good variety and thus establishing the uniformity in 

 product which is necessary in all market fruits. This difficulty 

 has now been removed and development is in progress. There 

 are probably more than 100 acres now planted in orchard in 

 Florida, and inquiries are coming to Hawaii from California for 

 thousands of seeds to start nurseries." 



(To be Continued) 



