. Annual report of the North Carolina Agricultural Experiment Station. with the Bordeaux mixture. VETCH- Downy Mildew (Peronospora vicio? (B.), DeBy.).—This dis-ease appeared upon cultivated vetch in Wake county this springand did a great deal of damage. The plants affected did not de-velop normally, were much smaller, weaker and paler than the neigh-boring ones. Upon close examination the under side of the leaveswas found to be covered with the fine down of Peronospora, WATERMELON. Wilt (Neocosmospora vasinfecta var nivea Erw. Smith).—In-quiries concerning this were received from Vance county
. Annual report of the North Carolina Agricultural Experiment Station. with the Bordeaux mixture. VETCH- Downy Mildew (Peronospora vicio? (B.), DeBy.).—This dis-ease appeared upon cultivated vetch in Wake county this springand did a great deal of damage. The plants affected did not de-velop normally, were much smaller, weaker and paler than the neigh-boring ones. Upon close examination the under side of the leaveswas found to be covered with the fine down of Peronospora, WATERMELON. Wilt (Neocosmospora vasinfecta var nivea Erw. Smith).—In-quiries concerning this were received from Vance county. NORTH CAROLINA AGRICULTURAL EXPERIMENT STATION C. B. WILLIAMS, Director. PRESS BULLETIN No. 17— FEBRUARY 15, 1908. THE GRAPE BLACK EOT. This disease prevails in all parts of North Carolina. In most sec-tions of the State it is so bad that the grape crop is practically rainedunless proper measures be taken to prevent the disease. The black rot is easily recognized from the accompanying illus-tration showing its most conspicuous characters, blackening, drying. and final shrivelling of the grapes in the clusters. Often all of themshrivel and dry in this way. Though the disease is seldom noticeduntil the grape is badly shrivelled, it may be seen earlier as a brownor black spot on the berry. Before its appearance upon the fruit at 84 THIRTY-FIRST ANNUAL REPORT, 1908. all it may be found as brown spots, one-eighth to one-half an inch indiameter, on the leaves or twigs. Very close examination of the dis-eased spots on twigs, leaves or fruit, reveals the presence of very smallpustules in great numbers. These pustules are the fruiting bodies of the fungus which is thecause of the black rot, and from these pustules issue immense num-bers of spores, which serve to spread the disease. This disease can be prevented. If you saw black rot on yourgrapes last year it will almost certainly be there again this year, unlessyou take steps to prevent it. Prevention is simple and sure. It con
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