319 



plants are exainiiiod before they have wihed, a white, mold-like 

 fungus, the early stage of Or^onhim, will be found on the surface of 

 the roots as well as in the iiiechdlaiy rays and vessels. Young plants 

 in pots inoculated with threads of the Ozoniiitn died of the disease. 

 The wart-like bodies found on the roots of cotton and other plants 

 affected are masses of the fungus and retain vitality for a long time. 

 The Ozoiiiiim does not, however, produce the knotty bodies often 

 found on the roots of diseased apple-trees. A large ninnber of plants 

 are affected by this fungus, as sweet potatoes, a])ple and some forest 

 ti'ees, and also the weed known as ''common sida '' {Sula sphtosd). 

 The O'coniiim ])repares the Avay for a large number of saproph3'tic 

 fungi, like Mncor and PciihiHiuin ^ which complete the destruction 

 I»egun by the root-rot. A fun<2:us ca]ial)le of producing rot in sweet- 

 ]>otatoes and young cotton was isolated from rotten sweet-potatoes by 

 the author, but he is not sure that it is connected Avith Osonium. 

 The lint from plants affected with root-rot is nnich inferior in <iuality. 

 Seeds from diseased stalks showed good capacity for germination. 



Treatment. — Fungicides did not check the disease, except chloride 

 of lime, and where this was used no cotton was produced. Rotation 

 of crops is advised as practically the only thing, so far as known, 

 which will sto]i the disease. Grasses should l>e grown in the rotation, 

 allowing three years to intervene befoi-e cotton is again ])lanted. 

 Care should be taken not to obtain plants from an infected nursery 

 or field. 



BULLiyriN No. 8. DECEMBEK. 1889. 



AVoRK IX HOKTuri/n KE, T. L. Brink, B. S. (pp. 3-39). — This 

 includes seven articles under the following heads: (1) Notes on 

 experimental vineyard'-;. (2) Experiment with strawl)erries. (3) 

 Notes on blacklu'rries and ras])berries. (4) Notes on grasses. (5) 

 Best varieties of fruits foi- the different sections of Texas, Avith notes 

 from correspondents. ((>) List of fruits growing in experimental 

 gi'ounds. (7) List of forest, shade, and ornamental trees in College 

 arboretum and of shrubs growing on the campus. 



Ne)tes on exper'nnentnl rhu ijard (pp. .l-l*)). — This includes brief 

 accounts of the d(j\vny mildew {Perotiosinn-a r'd'ieohu De B.), powdery 

 mildew (F n<bnihi spjiuiJix, B. and C. ) . black rot (L(vstadia h/diretfii, 

 Viala and Kava/ ). grape-leaf blight { ('hidd-sjioriinn rit'(eedum.Y\?i\?i) ^ 

 leaf-spot disease {I'lii/ll<>stt<t<i hihrnxcn^ Tliiim.), and anthracnose 

 (Sphaeeloma am pilhinni . I )e 1).). with suggestions as to remedies; 

 and notes and a tabular iccord for sixty-five varieties of grapes, with 

 f-eference to the injury caused to them by fungi and by insects, espe,- 

 cially the leaf roller. 



K.rptr'nnchts irifli .^f ra wlxj-fies (pp. l(>-'2l). — A tabular record of 

 yield and period of bearing, together with descriptive notes, for 

 twentv varieties. 



