54 EXPERIMENT STATION RECOED. 



(Baris lorata), the fig stem-boring beetle (Sinojcylon sudanicum), white ants, 

 and the black garden ant {Aj)h(cnogaster harhara). 



The plants diseases ordinance of 1910 is appended to the report. 



Suppression of the cotton white scale in Piura, C. H. T. Townsend (Bol. 

 Dir. Fomcnto [Peru], 9 {1911), No. 3, pp. 1-7). — This paper briefly considers 

 the cotton white scale (Hemichionaspis minor), the cotton square weevil 

 (Aiithononius sp., probably vestitus), the cotton strainer (Dysdercits rufwoUis), 

 etc. 



Insect pests of jute, H. L. Dutt (Dept. Agr. Bengal, Quart. Jour., 5 (1911), 

 No. 2, pp. 107-110). — This important fiber crop has several important Insect 

 enemies, including leaf feeders and capsule and stem borers. Particular men- 

 tion is made of the indigo caterpillar {Laphygma exigua). the jute semilooper 

 (Cosmophila sal)ulifera) , and the " behar " hairy caterpillar {Diacrisia 

 obliqua). 



The enemies of rye, P. Noel (Bui. Lab. Regional Ent. Agr. [Rouen], 1911, 

 No. -J, pp. '1-7 ; abs. in Internat. Insi. Agr. [Rome], Bui. Bur. Agr. Intel, and Plant 

 Diseases, 2 {1911), No. 11-12, p. 2623). — The author lists 37 insect enemies 

 of rye. 



Fruit fl^ies and other insects attacking cultivated and wild fruits in New 

 South Wales, W. B. Gurney {Agr. Gas. N. S. Wales, 23 {1912), No. 1, pp. 

 75-80, pis. 2, figs. 9).— This third paper (E. S. R., 26, p. 150) deals with the island 

 fruit fly {Trypeta musie), the tomato fly {Lonchwa splendida) which sometimes 

 attacks citrus fruit, the ferment fly {Drosophila obscura) which attacks all 

 classes of damaged fruit, fruit-eating beetles of the genus Carpophilus, and the 

 identification of fruit fly maggots. 



New control methods for the pear thrips and peach, tree borer, E. L. 

 Morris {California Sta. Bui. 228, pp. 367-37 J,, figs. 6).— The investigations of 

 control measures for the pear thrips here reported are based on experiments 

 conducted during 1910 and 1911 in a pear orchard near San Jose, Cal. Experi- 

 ments carried on in 1910, in which applications of whitewash were made in 

 different amounts by spraying before the buds were open sufllcieiitly to admit 

 the thrips, resulted in finding the number of blossoms to be in direct proportion 

 to the amount of whitewash applied. The trees which had a thin coating of 

 whitewash had very few blossoms, while those which had a very thick coating 

 of whitewash had an abundance. The amount of fruit corresponded to the 

 number of blossoms. 



In 1911 the experiment was repeated on a larger scale. An application of 

 lime made with a view to showing that the whitewash would have the same 

 beneficial effect when applied a week or more before the buds open, as when 

 applied at the time of opening, was rendered worthless by an untimely down- 

 pour of rain. A second application made just as the buds were beginning to 

 open gave results similar to those of 1910. All the sprayed trees came into 

 full bloom and the uusprayed trees blossomed very feebly; the fruit corre- 

 siionded very closely to the blossoming, the sprayed trees averaging 8 times as 

 much as the unsprayed trees. 



Eighty lbs. of quicklime was used to make 100 gal. of spraying material, the 

 whitewash being strained through a 1/14 in. mesh wire screen and the same 

 sized screen used on the suction hose of the pump. The ordinary Bordeaux 

 nozzles worked well, but it was necessary to enlarge slightly the opening in the 

 disks of the Vermorel type nozzles. 



The work with the peach tree borer {Sanninoidea pacifica), an insect of much 

 economic importance in the horticultural district around the southern arm of 

 San Francisco Bay, was conducted at Berryessa, Cal. Experiments by the 

 author led to the use of hard asphaltum, grades "C" and "D" with good 



