102 PATHOLOGY [Bot. Absts., Vol. V, 



determined. — Musty grain intended for human consumption should be washed thoroughly 

 and the light grains skinned off. [Through abst. by Matous check in Zeitschr. Pflanzenkr. 

 29:203-204. 1919.]— D. Reddick. 



753. Muller, K. Die Bekampfung der Rebenperonospora nach der Inkubations-Kalen- 

 dermethode. [Control of grape downy mildew by the incubation-period method.] Jahresber. 

 Vereinig. Angew. Bot. 16 : 21-28. 1918. — Based on the investigations of Istvanffi and coworkers 

 regarding the relation between incubation period and outbreaks of Plasmopara, and telluric 

 conditions. Experimental trials made in Baden show that dates of outbreaks can be forecast 

 with sufficient certainty to give growers warning in time to make protective treatments. 

 [Through abst, by Seeliger in Zeitschr. Pflanzenkr. 29: 205. 1919.]— D. Reddick. 



754. Nowell, W. Bracket fungi of lime trees and the critical period in the development 

 of young lime trees. Report on the Agricultural Department, Dominica, 1917-18. 11-14. 

 Imperial Department of Agriculture, Barbados. 1919. — The author, as Mycologist to the 

 Imperial Department of Agriculture, reports on the prevalence of smaller fungi, of which Nec- 

 tria and Stilbum spp. are the most noticeable, on the dead branches of lime trees. While 

 functioning mostly as saprophytes, these fungi may, in certain types of cases, become weak 

 parasites affecting principally the wood. Interesting suggestions are given on the treatment 

 of lime trees during the critical period of their development, — J. S. Dash. 



755. Paine, S. G., and W. F. Bewley. "Stripe" disease of tomatoes. Jour. Ministry 

 Agric. Great Britain 26: 998-1000. 1920. — A brief popular account is given of "stripe" disease 

 of tomatoes occurring chiefly in greenhouses, caused by a bacillus closely related to, if not 

 identical with, Bacillus lathyri. The disease affects the tissues of the stems, leaves, and 

 fruits which become stained a dark brown color. Suggested preventive and remedial measures 

 consist in avoiding seed from fruit grown in an infected area, in disinfection of the soil where 

 an attack has occurred, in using a balanced fertilizer, in using care in pruning the plants, and 

 in altering the temperature and humidity to favor a more hardy development of the plants. — 

 M. B. McKay. 



756. Paine, Sydney G., and W. F. Bewley. Studies in bacteriosis. IV. — "Stripe" 

 disease of tomato. Ann. Appl. Biol. 6: 183-202. PL 8-9, 5 fig. 1919. — The symptoms appear 

 as brown to black sunken areas or stripes on the stem, as yellow to brown blotches on the 

 leaves, as brown sunken patches on the fruit, and as brown discoloration of the root cortex. 

 Infection appears usually to take place underground, but the disease may be spread from 

 plant to plant above ground. A soft rapid growth of the plants renders them more suscep- 

 tible to attack.— Macros porium solani may occur as a saprophyte on the lesions. — Lesions 

 occur also in the pith and cortex. The disease is assigned to a bacterial growth which advances 

 from the root up the stem in the pith, and works outward, causing swelling and browning 

 of the cell walls as it passes to the exterior, then spreads upward in the outer cortical layers 

 and epidermis. — Bacteriolysis apparently may occur in the plant tissue, since some diseased 

 spots seemed to be sterile. — The organism is described, and appears to be identical with 

 Bacillus lathyri, differing only in a slightly higher resistance to heat and apparently greater 

 ability to reduce nitrates. — An organism apparently identical with Aplanobactcr michiganense 

 was also isolated from affected plants, but did not reproduce the disease. [See also next fol- 

 lowing Entry, 757.]— G. R. Bisby. 



757. Paine, Sydney G., and H. Stansfield. Studies in Bacteriosis III. — A bacterial 

 leaf-spot disease of Protea cynaroides, exhibiting a host reaction of possibly bacteriolytic nature. 

 Ann. Appl. Biol. 6:27-29. PI. 2, fig. 8-6. 1919. — The disease is characterized by dome-shaped 

 reddish-brown blisters or by sunken spots on the leaves. — The host cells are thought to be able 

 to kill and perhaps dissolve the bacteria. There is production of a resin-like substance in 

 which the bacteria become imbedded. The host cells become disorganized. A red pigment 

 allied to phloro-tannin red was produced in the spots. — The parasite was isolated from but 



