Show hortick points central western states hurt by san jose scale prepared by the united states state department of agriculture san jose scale lias has become so BO destructive tive during the last few years yeara throughout the southern limits of the apple belt lu in the central western states that it threatens the de destruction strud of the apple industry R realizing eal izing that the scale must be controlled or many growers would be driven out of the orchard business the united states department of agriculture be 1 gan as aa soon as practicable a series of experiments for controlling the post peat climatic effects with more or less carelessness in spray spraying ipg methods method 8 on the part of many growers glowers Is responsible for an increase in the spread of scale ecale when tho the scale began to increase because of unfavorable weather spraying also was and consequently pot not ns as efficiently dono done as necessary F failure allure to spray during tile the dormant season w with ith liquid lime sul chur had bad much antich to do with poor results because ot of tile the urgent need for relief based on preliminary results of the experimental work recommendations were made by the department for the control of the scale and so ao far b have ave proved satisfactory department circular discusses the methods of spraying found v to be effect effective lv of all the insecticides used in the experimental peri pert mental tests best results wre were obtained with the so called paraffin oll oil or lubricating oll oil emulsion thorough spraying with an emulsion containing 2 per cent of oil should clean up bad infestation of scale Althou although gb the time to spray Is in tho the dormant season when it Is advisable to make two applications ummer summer sprays of oil emul slon rion will give a partial checking of the scale when this insecticide to Is used during the growing season precaution should be taken to mako make the application during the cool part of the day injury to fruit and especially to foliage ts Is likely to result from its use during extremely high temperatures methods for preparing the oll oil emul slon sion sprays and for their application as well as the results of the experimental work at various stations and sections of the infested orchard territory are given in this preliminary report |