Digitized by the Internet Archive in 2011 with funding from LYRASIS members and Sloan Foundation http://www.archive.org/details/reportoncommerci1925bail S Bulletin 272 December, 1925 . £, ^K^ (Emitterttrttt Agricultural Experiment Station Nrro Baopn, (Cdmtrrttrut Report on Commercial Insecticides and Fungicides 1925 CONTENTS Page Introduction 143 Classification of materials 143 Methods of analysis 144 Results of inspection, etc 144 Index i The Bulletins of this Station are mailed free to citizens of ConnecticuL who apply for them, and to other applicants as far as the editions permit. CONNECTICUT AGRICULTURAL EXPERIMENT STATION OFFICERS AND STAFF December, 1925 BOARD OF CONTROL His Excellency, John H. Trumbull, ex-officio, President Charles R. Treat, Vice-President Orange George A. Hopson, Secretary Mount Carmel Wm. L. Slate, Jr., Director and Treasurer New Haven Joseph W. Alsop Avon Elijah Rogers Southington Edward C. Schneider Middletown Francis F. Lincoln Cheshire STAFF. E. H. Jenkins, Ph.D., Director Emeritus. Administration. Wm. L. Slate, Jr., B.Sc, Director and Treasurer. Miss L. M. Brautlecht, Bookkeeper and Librarian. Miss J. V. Berger, Stenographer and Bookkeeper. Miss Mary E. Bradley, Secretary. G. E. Graham, In charge of Buildings and Grounds. Chemistry. E. M. Bailey, Ph.D., Chemist in Charge. Analytical Laboratory. R. E. Andrew, M.A. C. E. Shepard Owen L. Nolan > Assistant Chemists. Harry J. Fisher, A.B. W. T. Mathis J Frank C. Sheldon, Laboratory Assistant. V. L. Churchill, Sampling Agent. Miss Mabel Bacon, Stenographer. Biochemical Laboratory- Botany. Entomology. Forestry. Plant Breeding. Soil Research. Tobacco Sub-station at Windsor. T. B. Osborne, Ph.D., Chemist in Charge. G. P. Clinton, Sc.D., Botanist in Charge. E. M. Stoddard, B.S., Pomologist. Miss Florence A. McCormick, Ph.D., Pathologist. Willis R. Hunt, Ph.D., Assistant in Botany. A. D. McDonnell, General Assistant. Mrs. W. W. Kelsey, Secretary. W. E. Britton, Ph.D., Entomologist in Charge; State Ento- mologist. B. H. Walden, B.Agr. ) M. P. Zappe, B.S. Y Assistant Entomologists. Philip Garman, Ph.D. ' Robert B. Friend, B.S., Graduate Assistant. John T. Ashworth, Deputy in Charge of Gipsy Moth Work. R. C Botsford, Deputy in Charge of Mosquito Elimination. Miss Gladys M. Finley, Stenographer. Walter O. Filley, Forester in Charge. H. W- Hicock, M.F., Assistant Forester. Miss Pauline A. Merchant, Stenographer. Donald F. Jones, S.D.. Geneticist in Charge. P. C Mangelsdorf, S.D., Assistant Geneticist. M. F. Morgan, M.S., Investigator. George D. Scarseth, B.S., Graduate Assistant. Paul J. Anderson, Ph.D., Pathologist in Charge. N. T. Nelson, Ph.D.., Assistant Physiologist. THE TUTTLE, MOREHOUSE & TAYLOR COMPANY Examination of Insecticides, Fungicides, Etc. E. M. Bailey* INTRODUCTION. The Legislature of 1923 passed an act concerning the manu- facture, sale and transportation of adulterated insecticides and fungicides. The text of the law and regulations, made as provided therein for its enforcement, are given in Bulletin 258 issued by the station in 1924. Both the law and such regulations as have been made are substantially the same as the federal law and regu- lations so that articles of this class which satisfy the requirements of interstate commerce will be accepted in this State. The law requires this station to make analyses of samples which may be collected by the Dairy Commissioner or by our station agent. Evidence of adulteration or misbranding is required to be reported to the Dairy Commissioner who is responsible for enforce- ment of the law. Analyses and such other information regarding the character, composition and use of these materials as may be of interest are required to be published in bulletins of this station, either annually or at other intervals as may be advisable. The law carries no specific appropriation for the inspection work and a complete survey of the entire field of insecticides and fungicides each year is not thought to be advisable or necessary. During the past year our agent has collected samples of lead arsenate and other arsenicals, and miscellaneous materials ; exam- inations have been made also of products submitted from time to time by the Department of Entomology, and the Department of Botany of this station. CLASSIFICATION OF MATERIALS. The samples analyzed may be classified as follows : Materials No. of samples Lead Arsenate 15 Bordeaux-Lead Mixtures 5 Sulphur Preparations 6 Nicotine Preparations 7 Emulsions 3 Miscellaneous (including A. O. A. C. collaborative samples) . . 13 * Analytical data are by Messrs. Andrew and Fisher. Inspection and sampling by Mr. Churchill. 144 CONNECTICUT EXPERIMENT STATION BULLETIN 272 METHODS OF ANALYSIS. The methods of analysis employed are those authorized by the Association of Official Agricultural Chemists unless otherwise stated. RESULTS OF INSPECTION AND ANALYSIS. Arsenate of Lead. The specifications for arsenate of lead as defined in the law of this State are the same as those required by the Federal Insecticide Act. Dry arsenate of lead must contain not less than twenty-five per cent of total arsenic oxide (As 2 O g ), and arsenic in water-soluble forms not exceeding one and one-half per cent. Arsenate of lead, not dry or powdered, may contain not more than fifty per cent of water ; not more than seventy-five one- hundredths per cent of arsenic in water-soluble forms, expressed as arsenic oxide (As 2 5 ) ; and not less than twelve and one-half per cent of total arsenic oxide (As 2 5 ). Analyses of the products examined are given in Table I. LEAD ARSENATE 145 •OfJ UOIJBJS CTi O co 'i-oo t>» "*■ **■ O txOO 00 NN t^OO IO l~» «0 H CO N N O NNNr. 00 CTi IC <4- <4" ^f ^- CO N N M N N N •ubijj ssaj jou 9^ ■udt O ^ :::::•;: n •vo ■punoj 'UBIJJ 3.10m jou paajuBjenQ ■punoj •ueqj ssaj jou paajuu-ienQ •punoj UEIJ1 3J0UI JOU . p33}UBJBri[) ■punoj •0£[ UOIJBJS * NO O irjiOO m in m fooq m >- h uiioi«)0\ c-)VO vo vo vo vo VO vo VO ^.vq q o m w ts. h m q 0>— IHHI— It-HOt-ft-thH 10 o t% 6 w 6 _ Ov COCO 00 ^-00 00 00 K ^.OMi-Hi-iMwuwro dodo 06600 "3-00 00 00 6 6 6 6 00 l-c d d §00000000 .eooooooq ^ in o d >-i « d d d d 1-1 (^(OrocjrOforon uiMOModdwd 1-1 rofOr^fO^fOt^f^ ^ ^ ^ C) U . ^ >;*2 >- KE ^ u> T3 lUU £ £ £>;o gcj ,■; . . o^ oj A IU g-uu^ S .— o - M rt =r C n3 sj > O CJi O CO *J-00 l>«^|-rl-0>0 mcon t^oo 00 nn r-^oo o Sn t^ r^ r-» •<*-'«*-'J-M-^l-'