Journal of Economic Entomology, Volume 18Entomological Society of America, 1925 |
From inside the book
Results 1-5 of 62
Page vii
... Acids as Contact Insec- ticides 292 SIMMONS , PEREZ , and ELLINGTON , G. W. The Causes of Outbreaks of the Angoumois Grain Moth 309 SMITH , HARRY S. The Commercial Development of Biological Control in California 147 ' Withdrawn for ...
... Acids as Contact Insec- ticides 292 SIMMONS , PEREZ , and ELLINGTON , G. W. The Causes of Outbreaks of the Angoumois Grain Moth 309 SMITH , HARRY S. The Commercial Development of Biological Control in California 147 ' Withdrawn for ...
Page 124
... acid phosphate . When phosphate rock and sulphuric acid are mixed , hydrofluosilicic acid is liberated . Upon the addition of sodium chloride or sodium bisulphate , sodium fluosilicate is precipitated . Sodium bisulphate or nitre cake ...
... acid phosphate . When phosphate rock and sulphuric acid are mixed , hydrofluosilicic acid is liberated . Upon the addition of sodium chloride or sodium bisulphate , sodium fluosilicate is precipitated . Sodium bisulphate or nitre cake ...
Page 125
... acid . The precipitate obtained did not injure the plant and did not kill as rapidly as the pure calcium fluosilicate , due possibly to the formation of inactive substances such as calcium fluoride . When ground calcium carbonate was ...
... acid . The precipitate obtained did not injure the plant and did not kill as rapidly as the pure calcium fluosilicate , due possibly to the formation of inactive substances such as calcium fluoride . When ground calcium carbonate was ...
Page 126
... acid and a precipi- tate of silica . A sample of such by - product silica gave fair results in killing adults of the Mexican bean beetle . It is obvious , since pure silica is not an insecticide , that some impurities , such as adsorbed ...
... acid and a precipi- tate of silica . A sample of such by - product silica gave fair results in killing adults of the Mexican bean beetle . It is obvious , since pure silica is not an insecticide , that some impurities , such as adsorbed ...
Page 128
... acid phosphate . It can be obtained from any of the phosphate companies , like the Virginia - Carolina Chemical Com- pany , and several others . PRESIDENT A. F. BURGESS : The next paper is by H. C. Huckett . THE CONTROL OF APHIDS ...
... acid phosphate . It can be obtained from any of the phosphate companies , like the Virginia - Carolina Chemical Com- pany , and several others . PRESIDENT A. F. BURGESS : The next paper is by H. C. Huckett . THE CONTROL OF APHIDS ...
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Common terms and phrases
acid acre adults American American foulbrood aphids Aphis apple application Association of Economic average bait beans beekeepers bees beet brood Bureau of Entomology cages calcium cyanide Calif cent codling moth College Committee corn borer crop cutworm Department of Agriculture disease dust Economic Entomologists effective eggs emulsion Federal Horticultural Board feeding field flies foulbrood fruit fumigation gallons gipsy moth growers hatched Hessian fly honey inches infested injury insecticide insects investigations Japanese beetle July June killed laboratory large number larvae lead arsenate leaf Melrose Highlands method mixture nicotine observed Ohio oil emulsion orchard outbreak paper parasites peach peach moth percentage period pest pine plants pounds PRESIDENT A. F. BURGESS pupae pupate quarantine records scale season sections showed sodium soil species spray spring sulfur summer temperature tests tion trees U. S. Bureau Vice-President Washington weevil wheat wireworm worm