466 EXPERIMENT STATION RECORD. 



A. M. Pearson for gpraying a number of rows of vines or hops simultaneously. The 

 sprayer is arranged to be propelled by horse power. 



The results of some experiments with, insecticides on some garden and 

 greenhouse pests, E. Newstead {Jour. Roij. Hort. Soc. [London'], 26 {1903), No. 4, 

 2)p. 745-104, figs- 5) .—Experiments with kerosene emulsion in treating Lecanhmi 

 persic.r haA^e been continued with the result that this insecticide is highly recom- 

 mended for killing the scale. It is urged, however, that care must be used in its 

 preparation in order to make it most effective. 



Special studies were made of 2 species of subterranean mealy lings, Riper.sia terrestris 

 and DdcUjlopms radicum. R. terrestris was found infesting the roots of Stephanotis, 

 and later was found on the roots of palms and maidenhair fern. D. radicum was 

 found to be injurious to strawberries, but its natural food plants appear to be grasses 

 and Armeria maritima. In treating infested plants or greenhouses for these pests it 

 is recommended that infested plants should not be turned out of the pots while in the 

 conservatory; they should be removed and all soil shaken fi-om the roots, after which 

 the roots should be washed clean. The exposed roots and soil may then be sprayed 

 with carbon bisulphid. The pots are to be scalded and plants may be replaced 

 immediately after spraying. 



It is reported that Selcmdria atra was especially injurious during 1899 to wall-trained 

 pears and cherries. Notes are given on the habits and life history of this species. It 

 is recommended that the soil be removed from around the base of the tree to the 

 depth of 4 in. and that this soil be deeply buried or subjected to a high degree of 

 heat. Boiling water, according to the author, is not sufficient to kill the puppe. It 

 is recommended that trees be sprayed with Paris green at the rate of 1 oz. to 20 gal. 

 of water. The first application should be made when the leaves are very small, and 

 the second abotit the middle of July, at which time the percentage of Paris green 

 may be doubled. Experiments with lime dressings, hot water, and kerosene emul- 

 sion, gave negative results. Notes are also given on fruit-tree tortrix {Penthina 

 variegana). The habits and life history of the species are described. In combating 

 this insect it is recommended that an application of Paris green be made when the 

 buds are opening, at the rate of 3 oz. to 20 gal. of water, and a second application 

 after the larvpe have spun the leaves together, at the rate of 2 oz. to 20 gal. of water. 



Insect enemies of the pear, plum, peach, and cherry, C. P. Gillette 

 ( Colorado State Bd. Hort. Rpt. 1901, pp. 55-77, figs. 31) . — Notes are given on the 

 habits, life history, and means of combating the more important insect pests of these 

 fruits. Among the insect enemies of the pear the following are discussed: Flat- 

 headed apple-tree borer, apple-tree slug, Putnam's scale, apple aphis, woolly aphis, 

 and pear-leaf blister mite. Notes are given on the following insect enemies of the 

 peach: Peach aphis, peach-tree borer, peach-twig borer, and peach lecanium. Among 

 the enemies of plums the following are discussed: Fruit-tree bark-beetle, plum 

 gouger, and plant lice. 



Remedies for insect and fungoid pests of the orchard and farm, A. M. Lea 

 {Pub. Dept. Agr. Tasmania, 1903, pp. 38). — The codling moth is considered the most 

 serious insect pest of Tasmania. Where the orchard is small and isolated it is sug- 

 gested that perhaps the best way of combating the insect is to destroy the entire fruit 

 crop for one season. In Tasmania this insect is single brooded. The author's experi- 

 ence indicates that 3 sprayings with arsenites, once before the lobes have closed, fur- 

 nish quite effective means for combating this insect. It is considered necessary, 

 however, to pick off the infested apples and bandage the trees. The Tasmanian 

 custom of placing a bundle of sacking in the fork of the tree is considered less 

 effective than the band. 



Descriptive and economic notes are also given on potato moth, cabbage worm, 

 cherry slug, scale insects, woolly aphis and other plant lice, a number of plant bugs, 

 grasshoppers, earwigs, red spiders, pear-leaf blister mite, clover mite, and black spot 



