556 EXPERIMENT STATION RECORD. 



Dodder, R. Helms (Producers' (las. and Settlers' Bee. [ West. Australia'], 5 (1808), No. 

 5, pp. 394-396, fi<j. 1). — Notes are given on Cnscuta trifo Hi, which is parasitic on 

 alfalfa. Spraying infested plants with a solution of iroD sulphate (1 lb. dissolved 

 in 10 gal. water), burning, mowing, and covering the affected plants several inches 

 thick with stable manure, and thus thoroughly smothering the weed, are among the 

 methods suggested for its eradication. 



Upon the destruction of Equisetums (Ztschr. Pflanzenkrank, S (1S9S), No. 3, pp. 

 175-17S). — Notes are given on the oceurrence of Equisetum palustre, with suggestions 

 for its eradication. 



Two pbanaerogamous parasites of red clover, B. D. Halsted (Bui. Torrey Bot. 

 Club, 25 (1S9S), No. 7, pp. 395-397 , fig . Z).— Notes are given on the parasitism of Cus- 

 euta epithymum and Orobanche minor on red clover. 



Orobanche speciosa, G. Henslow (Gard. Chron., 3. ser.,24 (189S), No. 605, p. 89). — 

 The author reports having observed a field of beans just outside of Cairo, Egypt, 

 which was seriously attacked by this parasitic plant. 



Weeds which afford protection to noxious insects, A. M. Lea (Producers' Gaz. 

 and Settlers' Bee. [ IT. Australia'], 5 (1S9S), No. 4, pp. 286, 287). — The author enumerates 

 a number of weeds which serve as food plants for noxious insects and suggests a 

 destruction of these weeds wherever abundant. 



Noxious weeds, R. Helms ( West Australian Settle7-'s Guide and Farmer's Handbook, 

 1897, pt. 3, pp. 532-563, figs. 14). — Descriptive notes are given of 68 of the more 

 troublesome weeds, with suggestions for their eradication. 



DISEASES OF PLANTS. 



Peach yellows in nursery stock, G. H. Powell {Delaware Sta. 

 Kpt. 1897, pp. 168-174, figs. 5). — The author states that while inspecting 

 nurseries in October, 1896, it was noticed that small, yellowish, willow- 

 like shoots occurred from the buds of a considerable portion of the trees 

 budded during the season. The general appearance of these indicated 

 that the nursery stock was attacked by peach yellows and specimens 

 submitted to the Division of Vegetable Physiology and Pathology of 

 this Department confirmed the supposition. The author, however, 

 became convinced that the general appearance was not due to peach 

 yellows, but that its origin was to be found in the constriction caused 

 by the inserted bud, the hot, dry weather during the buddiug season, 

 and the subsequent warm rains in September, which caused a secondary 

 growth of the wood. In four nurseries budded late in the summer and 

 fall 32, 34, 49, and 86 per cent of the trees presented the sprouted 

 appearance. In the nursery where 86 per cent showed this growth two 

 buddings had been performed, as the hot, dry weather seriously inter- 

 fered with the first budding. Investigations made to determine the 

 influence of crowding, air, light, and root-foraging extent seem to indi- 

 cate that the outside rows, which were subjected to greater drought on 

 account of lack of shade, suffered the most. 



When a comparison of the willowy shoots from the nursery trees was 

 made during the month of October with those of similar size from trees 

 known to be affected with peach yellows, several striking differences 

 were observed. The shoots from trees with yellows were more slender, 

 paler in color, with drooping leaves, and they had continued growing at 



