DISEASES OF PLANTS. 895 



plants proved successful not only in increasing- the yield, but the pints 

 receiving- the mulch contained less fruit rot than the others. 



Uxperimentu icith cucumhcrs (p|>. ao.'i-.iO.")). — K\i)eiinients were con- 

 ducted on 2 i)lats for the prevention of anthracnose (('o//<,'/o</-/V/</a« 

 lagcnarium) and mildew {Pldsmoimnt. cKbensis) which indicated that 

 both diseases may be successfully combated by the use c.f fungicides. 

 Of those tested r>ordeaux mixture gave the best results. It not only 

 increased the yield but preserved the fruit from ripening. Suli)hate of 

 copper solution ranked next and eau celeste third of the fungicides 

 applied, while potassium sulphid gave negative results. The author 

 states that nndching is beneficial in preventing the decay of fiui'ts. 

 The ett'ect of pruning was to shorten the crop without any compensating 

 gains. 



Experimenlfi with celery (pp. 300-300).— The etfect was studied u\' 

 Bordeaux mixture, neutral solution of copper sulphate, ammoniacal 

 copi^er carbonate, potassium sulphid, and eau celeste for the i>re- 

 vention of celery blight. The plants were sprayed with the same 

 solution 5 times at interv^als of about 10 days. While there was no 

 great amount of blight present, Bordeaux mixture gave the largest 

 yield with the least percentage of destruction, followed by neutral 

 solution of copper sulphate and ammoniacal cojjper carbonate in the 

 order named. 



The eft'ect of irrigation was also studied, and it was found tliat the 

 non-irrigated rows showed a larger percentage of blight tiian the 

 watered ones. Irrigation increased the marketable crop thi-eefoid in 

 weight and in value about eightfold. 



Fungicide.s and spray hip (pp. 319-345). — The formulas for the fungi- 

 cides used in the foregoing experiments, methods of application, and 

 various notes concerning their use are given. 



Abnormal yroirth.s due to fungi (pp. 355-300). — Xotes are given on 

 witch's brooms, rust distortions, club root malformations, root knots of 

 young trees, etc. 



A bacterial disease of the tomato, eggplant, and Irish potato, 

 E. F. Smith {V. S. Jhpt. Agr., Division of Vegetable Physiology and 

 Pathology Bui. 7;?, 2H>- ~'S P^-"'- ^^)- — '^^^^ attention of the author was 

 first drawn to this disease by the statement of B. 1). Ilalsted tiiat 

 it was due to the same microorganism as that causing the bacterial 

 wilt of cucumbers and cantaloupes. ' During the author's study of the 

 cucurbit disease it became evident that the two diseases wi're due to 

 different causes. 



In 1805 diseased toniato i)lants were studied and inoculations nmde 

 in the laboratory and greenliouse. From these diseased sp«'cim«'ns an 

 organism was separated wholly unlike that of the cucumber wilt, and 

 numerous satisfactory infections were made upon living i>otato and 

 tomato idants. In August, 1805, the author found what appeared to 



'Mississippi Sta. liiil. lit (E. S. R., 3, p. 702). 



