156 HORTICULTURE [Bot. Absts. 



Avoid plowing between March 1st and June 15th, to prevent injury to root systems when 

 trees are making maximum growth. Plow, instead, during October to February. (3) Im- 

 proper moisture content of soil by incorrect irrigation methods, especially during April, 

 May or June. (4) Improper drainage and subsoil conditions. (5) Insect pests. Four in- 

 sects primarily responsible are given. The "June drop" is due to one direct cause — citrus 

 fungus (Altenaria citri). To reduce the development of this fungus, adopt clean culture 

 during winter, keep trees pruned properly and permit no decayed oranges to remain in the 

 grove. — E. L. Overholser. 



1058. Calvino, Mario. El pimiento sarmentoso del Peru. [The climbing pepper of 

 Peru.] Revist. Agric. Com. y Trab. 2:61. 1 fig. 1919. — The clinging pepper of Peru 

 (Capsicum pubescens) is described as one with notable vigor, a heavy producer and probably 

 useful for hybridization with the Chili pepper. A technical description is given. — F. M. 



Blodgett. 



1059. Calvino, Mario. Resena general sobre la aboricultura frutal de Mexico. [Mexi- 

 can Horticulture.] Revist. Agric. Com. y Trab. 2:252-258. U fig. 1919.— The different 

 climatic zones of Mexico are outlined and the more important fruits in each are described 

 with particular reference to history, habit of growth, and character and commercial value 

 of the fruit.— F. M. Blodgett. 



1060. Calvino, Mario. Alta horticultura, Las inyecciones interorganicas en las plantas. 

 [Inorganic injections in plants.] Revist. Agric. Com. y Trab. 2:287-288. 7 fig. 1919. — 

 Experiments previously reported in Bull. 75 and 79 of the Estacion Agricola Central de Mexico 

 are reviewed and the starting of similar tests in Cuba is described. — F. M. Blodgett. 



1061. Cushman, Allerton S. Growing medicinal plants in America. Jour. Heredity 

 10:32-38. Fig. 1-8. 1919. — A reprint from a previous article in which the author deals 

 with the botanical source of many drugs, and the limitations, difficulties, and conditions 

 encountered by a group of workers whose purpose it was to demonstrate that American 

 methods were capable of making us independent of Central Europe with respect to some 

 very necessary medicinals. — M. J. Dorsey. 



1062. Davis, W. E., Jr. Some lime-loving alpines. Garden Mag. 29:21. 1919. — 

 Alpine plants are divided into three sections: (1) those whose cultures demand that there 

 be lime in the soil in which they grew, known as lime-loving alpines; (2) those which do not 

 make this requirement; and (3) those which protest against any soil of a calcareous nature. 

 It is pointed out that the formation of a considerable portion of the Alps is limestone and 

 that plants coming from these formations should have a similar habitat when planted else- 

 where. Then follows a discussion of the application of this to plantings of Alpine plants, 

 with a long list of those classed as lime-loving species. — H. C. Thompson. 



1063. Esam, Gordon. Tests with unfruitful plum trees. New Zealand Jour. Agric. 

 18: 162. 1919. — Reports are results of experiments in cross-pollination combined with prun- 

 ing.— -E. R. Hodson. 



1064. Fairchild, David. Testing new foods. Jour. Heredity 10: 17-28. Fig. 1-5. 

 1919. — A discussion of the methods and practices necessary in finding and testing new foods 

 together with the difficulties encountered in introducing them on domestic markets. — M. J. 

 Dorsey. 



1065. Farrington, E. I. The worlds best for our own gardens. Garden Mag. 29: 18. 

 Feb., 1919. — Contains information on a number of introduced trees and shrubs found in 

 nurseries. — H. C. Thompson. 



