250 EXPERIMENT STATION RECORD. 



since 1878, but only the pycnidial form of development had been 

 observed. The author examined abundant material of Vitis rupestris 

 and T 7 . riparia from Hungary in 189G, and in addition to the pycuidia 

 he claims to have observed the spermagonia, conidiophores, and 

 perithecia. The pycnidia, spermagonia, and conidiophores were found 

 upon the apparently vigorous shoots and the pycnidia appeared upon 

 the dried branches in October and November. 



Experiments were conducted in which the germination and growth 

 of the different forms of reproduction were observed. It is claimed 

 that while the black rot fungus does not attack the grapes after they 

 have changed color, the white rot is very active upon them even after 

 their maturity, seeming to indicate that the spores, etc., of Charrinia 

 diplodiella will not germinate in acid media. This fact was also demon- 

 strated experimentally, the sporidia germinating readily in slightly 

 alkaline sugar solutions. 



On the use of sulphate of iron for the destruction of the fungus 

 parasites of the grape, G. Croquevielle (Gompt. Rend. Acad. Sci. 

 Paris, 124 (1897), No. 8, pp. 418, 419).— The author reports favorably 

 upon the use of sulphate of iron as a winter treatment for the preven- 

 tion of black rot, oidium, mildew, authracnose, pourridie, etc., of the 

 grape. The method of application recommended is to bathe or sprinkle 

 the vines with a 10 per cent solution of sulphate of iron and place 

 the powdered sulphate about the vines at the rate of 500 to 1,000 kg. 

 per hectare, the quantity depending upon the porosity of the soil. 



In another publication ' the author recommends the application of 

 powdered sulphate of iron and gypsum to vines where the other treat- 

 ments have not been possible. 



It is claimed this treatment is more efficient and cheaper than where 

 copper sulphate is used in the same way. 



Tomato blight, P. H. Rolfs (Florida Sta. Bpt. 1896, pp. 37-4.8).— A 

 brief statement relative to the cause of the tomato blight and a list of 

 plants attacked by the parasite is given. Among the plants which are 

 liable to attack by this fungus are the tomato, pepper, eggplant, Irish 

 potato, fig, sweet potato, morning glory, beet, peanut, beans, cowpeas, 

 beggar weed, cabbage, summer squash, watermelons, English violets, 

 chrysanthemums, etc. The characteristics of the attack on each of 

 these plants are described at greater or less length. 



It is stated that the tomato-blight fungus lives in the soil and 

 attacks plants from this place; consequently any preventive means 

 applied to the foliage would be almost entirely useless. The life his- 

 tory of this fungus, which is stated to be a form of Sclerotium, is more 

 fully given in Bulletin 21 of this station (E. S. R.,5, p. 790), and it is 

 suggested that spraying the ground with any of the standard fungi- 

 cides for a distance of 6 in. or more about the stem of the plant would 

 probably give partial relief. 



» Rev. Hort., 69 (1897), No. 7, p. 147. 



