274 KKI'OHT OF OFFICE OF EXPERIMENT STATIONS. 



of yor.r thoy are usually fouud ncai- I he snifatr <>f (he bark (licy may 

 he (lestroved by suitable washes. The wash iH'coiunieiided l)\' (he 

 fc>()U(h (^irolina S(a(i()n is jji-cpared acc()rdin<; (o a formula of '20 

 pounds of lime, 15 jxtunds of whale-oil soap, 4 pounds of sul|)hui-. and 

 oiie-four(h pouiul of Paris <rn'oii in '2;") *;all()ns of wa(er. 'J'he west- 

 ern j)eaeh borer has been studied a( (he California Station." It was 

 found that (he ]:)resence of gum could not be dei)ended upon as an 

 indica(ion in locating the young larva'. Carbon bisulphid proved to 

 be a very efficient method of killing the worms. It is somewhat dan- 

 gerous to the tree, but the danger may be (juite removed by observing 

 proper precautions. The condition of the soil is considered the most 

 im]>ortant factor in determining the effect of carbon bisul])hid. The 

 soil next to the tree should be loose enough to allow (he gas to come in 

 contact with every part of the ground. 



THE PEACH TWIG-BORER. 



The peach twig-borer causes great (Tamage in certain localides, 

 and is widely dis(ributed. In California '' it was found that this 

 pest could be controlled by the thorough application at the right time 

 of lime-sulphur-salt wash prepared acording to the formula 40-20- 

 15-60. Every part of the tree should be covered with the wash and 

 the application should be made when the buds have begun to swell. 

 In some cases but slight injuiy Avas observed when the wash was 

 applied after some of the blossoms had opened. 



THE GRAPE ROOT-WORM. 



The grape root-w^orm, in recent years, has been especially injurious 

 in the Chautauqua grape region. The New York Cornell Station has 

 carried on extensive investigations to determine (he best methods of 

 ccmtrolling this jjest." It was found that a large percentage of the 

 pupai occur not over G inches below the surface of the soil and near 

 the base of the vine. If, therefore, the soil be thoroughly cultivated 

 betAveen June 15 and 25 these pupa? will be injured and exposed by 

 cultivation so as to greatly reduce the numbers of the pest. Cultiva- 

 tion may be repeated during July, and if thoroughly done will pre- 

 vent the grape root-worm from becoming a serious pest in the vine- 

 yard thus treated. Much attention was given to the construction of 

 suitable apparatus for capturing the beetles. Several beetle-catching 

 devices were devised and used by grape growers. Some of these were 

 small and simple, while others were of complicated construction and 

 driven by horsepower. The results obtained were quite satisfactory 

 and suggest the value of this method when combined wnth cultivation. 



o California Sta. Bui. 143. & California Sta. Bui. 144. 



c New York Cornell Sta. Buls. 208, 224. 



