986 EXPERIMENT STATION RECORD. 



experiments. It was fouml that the 2 summer washes whicli were used destroyed 

 only young scales and served merely as a slight temporary check upon the spread of 

 the insect. 



On the jrrincipal nursery pests likely to be distributed in trade (pp. 98-138). — These 

 notes on a large number of insects and fungus diseases observed upon various eco- 

 nomic plants are of especial interest on account of the possibility of their being 

 spread by nursery trade. 



The cankerworm on shade and forest trees (pp. 139-144) . — At Jacksonville, 111., great 

 injury was done to elm trees by the cankerworm. Bands of gas-tar and other material 

 was applied to the trees and 199 trees were sprayed with arsenite of lime, at a cost of 

 about 84 cts. per tree. In the spring further banding operations were carried on. 

 The insecticide operations seemed to give promise of good results. 



The Colaspis root worm (pp. 145-149). — Colaspis brvnnea was observed injuring the 

 roots of corn. The damage consisted chiefly in eating away the tap root. Other 

 insects were associated with the Colaspis in this work. Descriptive and economic 

 notes are given on this species. Until further details are learned concerning its life 

 history it is impossible to recommend successful remedies. 



Second biennial report of the Montana State Board of Horticulture, 

 1901-2, C. H. Edwards {Montana State Bd. Horf. Rpt. 1901-2, pp. 125, pis. 30).— A 

 copy is given of the law creating the INlontana State Board of Horticulture and pre- 

 scribing its powers and inspection duties. The rules and regulations adopted by the 

 board are also presented together with an account of the meetings of the Board and 

 business transacted. The State has been divided into inspection districts with an 

 inspector in charge of each district, and the reports of the different in.spectors con- 

 tain notes on the special conditions of the orchards and nurseries in different jtarts 

 of the State with reference to the prevalence of insect and fungus diseases. 



The codling moth is considered the most important pest with which the board has 

 to deal, this insect having recently secured a foothold in Helena, Missoula, and else- 

 where. The San Jose scale has not been found in INIontana. Notes are given on 

 clover mite, red spider, root nematodes, plum cnrt'ulio, crown gall, oyster-shell bark- 

 louse, apple-bud moth, apple-tree anthrat'uose, flat-headed apple-tree borer, woolly 

 aphis, etc., and remedies are suggested for controlling these i)ests. 



Nursery inspection in West Virg-inia, J. H. Stewart ( West Virginia Sta. Rpt. 

 on Nursery luspectiou, 1901 and 1902, pp. 64, ph. 5, fig. 1). — During the work of 

 inspecting nurseries and orchards of West Virginia it was found that all nurseries, 

 with one exception, were apparently free from dangerous insects and fungus diseases. 

 In the prosecution of this work 98 orchards, growing 270,000 trees, were inspected, 

 and the San Jose scale was found on about 141,000 of these trees in 55 orchards. 

 These orchards included fruit trees of various kinds. Detailed notes are given on 

 the conditions found in the various orchards. San Jose scale was thus found to be 

 generally scattered throughout the State. Notes are given on the habits and life 

 history of this insect and on the treatments which have been found most effective 

 in combating it. These remedies include the encouragement of natural enemies, the 

 destruction of infested plants, spraying with oils, whale-oil soap, and the California 

 wash. Notes are also given on various other diseases and dangerous insects which 

 are mentioned in the State law concerning insect and fungus i>ests. As a result of 

 the experimental insecticide work conducted in this State it was found that crude 

 petroleum or any of its local products will kill San Jose scale, but is also likely to 

 injure fruit trees if used undiluted. When mixed with 3 or 4 parts of water this 

 substance was as effective in destroying the scale as when used in somewhat greater 

 strength. Kerosene was found to be equally as effective as crude i)etroleum. The 

 author believes fiom his experiments that paraftine is the constituent of oil which is 

 most likely to injure trees. 



