783 



Tlic rosults are arr.Tnjjjeil by counties, loiiiiiitMuing with the nortlu'inmost tier aud 

 proceedinji by tiers southward. 



The exhibit phuiiiy shows that in a si-asim like that of ISfll beets of fjjood nuality 

 for snjjar productiou can be >;rown in certain parts of Iowa. ^ 



It is not safe to assume tiiat the rehitive a(hii)talHiity of tiie dill'erent counties to 

 the beet sugar industry is truly <u- even approximately represented by the results 

 of a single year's investigation, aud this is of course especially true of those couu- 

 ties from which but few samples wore received. 



' It is true the results for the .State as a whole do not indicate as high an average 

 (|uality of beet as is reported from some States in the drier regions farther west and 

 uorthwest; but on the other hand the average yield of beets per acre is in Iowa very 

 much larger than is possible in th(>se States without irrigation. 



Fungous diseases of sugar beets, L. H. Pamjiel, B. x\gr. (pp. 

 231-2.")4, plates 7). — Illustrated notes on beet rust ( Vromyecs befcr), white 

 rust of beets {Cystopus blifii), spot disease of beets {Ccrrosporaheticola), 

 a root disease of beets (probably related to Rkizoctonia bcUe), aud the 

 scab of beets. 



The white rust was observed on the leaves of beets at the station in 

 the fall of 1890, It formed white pustules on both sides of the leaf, 

 which consisted of a large number of small spores. The germination 

 of the conidia was not observed, nor were any of the oospores found. 

 The author, however, thinks that the fungus in all probability is Cys- 

 topus blitii. 



The spot disease of beets was quite prevalent on sugar beets at the 

 station. Analyses indicated that this disease did not materially afiect 

 the sugar content of individual beets, though it reduced the total yield 

 of the crop. The author has observed that the conidiophores of this 

 fungus "not only pass out through the stomata, but also break the 

 epidermal cells.'' He thitiks that Bordeaux mixture and ammoniacal 

 carbonate of copper may be used as preventives, but has made no 

 experiments in this line. 



A root rot disease of sugar beets was observed at the station in 

 August, 1891. "It did not appear to be the nematode disease common 

 in Europe, though nematode worms (allied to AnguUula) were common 

 in the decaying roots." The author thinks it is caused by Ehizoctonia 

 bcta\ <lescribed by Kiihn. The disease manifests itself by a gradual 

 dying of the plant, the leaves usually turning pale and becoming limp. 

 Holes closely infested with the brown mycelium of the fungus are found 

 in the crown or sides of the beets. The mycelium slowly extends down 

 the root and usually invades all the smaller roots and rootlets. Bac- 

 teria play a part in the ultinuite rotting of the beet. Several species 

 have been isolated. The disease was induced in healthy beets by inocu- 

 lation. Eotation of crops is suggested as a preventive. 



Scab on beets has been observed by the author in a few cases, and he 

 is inclined to believe that it is identical with the deep form of potato 

 scab. 



Notes on in.jurious insects, H. Osborn, M. S., and H. A. Gos- 

 SARD, B. S. (pp. 255-273, figs. 3). — Notes on the ludiaucetonia {Euphoria 

 U^Sd—^o, 11 3 



