30 UNIV. OF N. n. AGR. KXPERiMENT STATION [Bulletin 238 



BURGUNDY MIXTURE FOR SPRAYING 



In continuation of the studies of fungicides, O. llutler has made investi- 

 gations of J^)Urgundy mixture (hiring the year. Using a 1:1.84 mixture, 

 he finds that while the method of mixing and the temperature do affect the 

 rate of settlement, the effect produced is less marked than in the case of 

 Bordeaux mixture. IN'Tixtures in wlrich the ratio co]-)pcr sulphate to sodium 

 carbonate is 1:1.5 or higher were found to decompose with the formation 

 of malachite, mixtures in which the ratio is 1 :1 with the formation of a blue 

 copper carbonate. 



In studying the effect of spraying on the dry matter formed in plants, 

 sunflowers and .beans were used. The beans sprayed with P'urgundy mix- 

 ture were somewhat injured; in the case of the sunflowers the effect pro- 

 duced was very similar to that secured by spraying with neutral Bordeaux 

 mixture ; i. e., there was an increase in the dry mattei* formed. (Adams 

 Fund.) 



POST-MORTEM EXAMINATIONS 



The difficulties with disease that confront poultrymen may best be shown 

 by a summary of the specimens received for post-mortem examinations in 

 one year's time at the Station laboratory. 



A total of 2,729 individual specimens was received, of which 2,625 were 

 poultry. Bacillary white diarrhea again leads the list with 703 specimens, 

 of which 668 were chicks. Over 90% of these chicks are believed to have 

 come from out-of-State or non-accredited sources, a large proportion of 

 them from commercial hatcheries. Pneumonia cases totaled 421 ; coccidio- 

 sis, 417; paralysis, 151; and enteritis, 96. 



During the latter part of the season, due to the cold, wet weather, large 

 numbers of specimens showing coccidiosis were received. A total of 417 

 was recorded for the year as against 364 last year ; 201 of these specimens 

 were cases of cecal or acute coccidiosis and 216 of them chronic or 

 duodenal. 



A pathological condition showing approximately the same lesions as 

 chronic duodenal coccidiosis and found in the same class of birds was 

 enteritis, with 96 specimens in which no evidence of coccidia could be 

 detected. Included in the 216 specimens with chronic coccidiosis and the 

 96 with enteritis, 151 birds were found showing typical symptoms of par- 

 alysis. In practically every instance where paralysis was present there was 

 enteritis accompanying it and in most instances duodenal coccidiosis. This 

 tends to substantiate our experimental conclusions that paralysis in New 

 Hampshire is very closely associated with coccidiosis. 



Cases of pneumonia numbered 421 as against 290 for last year, and in 

 practically every instance were associated with bacillary white diarrhea in 

 young chickens. A very small percentage, probably not over 20%, were 

 cases of pneumonia due to brooding faults. 



A condition locally termed "crazy chicks," occurring sometime during 

 the third or fourth week of the chicken's life, has become quite prevalent, 

 135 specimens having been diagnosed as such. The symptoms are an un- 

 steady gait, loss of equilibrium, tipping back on the tail-head, getting down 

 on the floor and kicking around in a circle and complete refusal of food. 

 In practically every case the affected chicks die. In most instances the 



