270 EXPERIMENT STATION RECORD. 



Caterpillar plague, II. Tkyon {Qaeendavd A<jr. Joar.,G {1900), No. 

 2, i)p. 135-lJf7,pls. S^Jig. 1). — This article contains a general discus- 

 sion of Leucania unipuncta, including an account of its food plants, a 

 description of the insect in its various stages, notes on its habits, life 

 history, distribution, and prevalence in Queensland. Among the 

 insect parasites of this species the following may be mentioned: The- 

 ronia rvfipes, Exephanes leucaniae, Linnaemyia nigripal^nis, Pa?iiscu.s 

 product us, and Apanteles rujicrus. The iirst 3 species are described 

 as new and are said to be of considerable economic importance. Calo- 

 soina aust'ralk is one of the more important of the predaceous insect 

 enemies of Leucania. The following birds are reported as being- 

 effective in the destruction of the army worm: Dacelo glgaSyStrepera 

 gracuUna, Corvus australis, etc. The usual artificial remedies for the 

 army worm are described and recommended. 



Plague locusts, W. W. Fkoggatt {Agr. Gas. New South Wales, 11 

 {1900), No. 3, p>p. 175-183, pjl. 1). — A locust plague of considerable 

 importance visited parts of Australia during the season of 1899, the 

 species concerned being Ejxicromia terminalis. The author made a 

 number of observations upon the numbers and habits of this species. 

 The eggs were deposited in open red soil. It was observed that the 

 number of males was far larger than that of females, there being al)out 

 40 of the former to one of the latter. A numljcr of female locusts 

 were examined for the purpose of determining the number of eggs, 

 and 19 eggs were found in each locust examined. The locusts caused 

 considerable damage to young grass and wheat. A description is 

 given of the male and female of this species. The author recommends 

 burning over the ground in order to destro}' the j^oung locusts soon 

 after hatching. The leaves of the common garden larkspur and of the 

 castor-oil plant were observed to be poisonous to the locusts. Locusts 

 which ate the leaves and flowers of the larkspur died very (juickl3\ 

 A number of experiments were tried in spreading the African locust 

 fungus among the locusts, but these experiments were begun too late 

 in the season to be most effective, as the locusts had already acquired 

 the power of flight. 



Orchard technique : IV, Spraying the orchard, W. B. Alwood 

 {Virginia Sta. Bui. 100, pp. Sl-lOJf, figs. 10). — The author gives 

 details with regard to the spraying done in 1899 in an old neglected 

 orchard which came under the care of the station. The first spraying- 

 was done March 17 with a solution of bluestone, the second April 28 

 with Bordeaux mixture, and the third May 12 with Bordeaux mixture 

 to which was added 8 oz. of green arsenite to 50 gal. of Bordeaux. 

 The total expense of these 3 applications was about 16.2 cts. per tree. 



Three sprayings were carried out on a young orchard, ]\Iarch 13, 

 April 20, and May 16-17. The first application was a weak solution 

 of bluestone, the second bluestone, and the third green arsenite. The 



