PUBLICATIONS ON AGRICULTURAL BOTANY IN FRANCE. 853 



BaciUus subtilis is associated with Micrococcus albidus. In another 

 memoir' he reviews the investigations of Thnxer and Holley on the 

 cause of potato scab and maintains that the disease is due to Micrococ- 

 cus jtcllucidus, which prepares the way for other fungi. The writer 

 believes that this question is by no means definitely settled. 



Investigations into the causes of the yellowing of beet leaves, adisease 

 imperfectly understood, have been begun by Troude,- and Prillieux^ 

 has studied the penetration of the roots of alfalfa and beets by 

 lihizoctonia violacea, and has investigated the various anatomical rela- 

 tions of the i)arasite and the host plant. Grosjean ' has recommended 

 Paris green sis a means for combating the beet Silpha. 



P. Vuillemiu'^ has demonstrated that leprosy of beets is due to Cla- 

 doclnjtrium pulpoHum or Fhyfiodcrma pnlposion, a widely sjjread parasite 

 of various chenopodaceous i»]ants. The swellings caused by the organ- 

 ism attain (;onsiderable size, a part of the reserve material of the beets 

 being" diverted from its normal use. The destruction of all wild cheno- 

 pods about the beet field is recommended. A disease of beans caused 

 by TylcncliKs (leva.statrix has been reported by Debray.'' This nema- 

 tode is found to attack the stem, leaves, and fruit, causing- the flowers 

 to fall, and destroying- the croi>. The whole plant often succumbs to 

 its attack. Severin ' has reported on means for the destruction of two 

 troublesome insects of the common osier (iSV(//.r riminaUs). Valerj-- 

 Mayet^ has reported means for preventing attacks on plums by Scolytus 

 prnni^ Jxhj/ncJilfcs Ixtrchus, and the larva' of Pludana in-vnuita. (Iros- 

 jean," who has been studying the cherry Chematobia, recommends the 

 means adopted in the United States for its repression. 



P. Yuilleuiin"' has reported on a disease of larch and pine trees, and 

 has established a new family of fungi, Hj^postomacea', which has affini- 

 ties Avith the Ascomycetes. Of the 2 species reported, Meria laricis is 

 parasitic on larch, and Hypostomumjiichianum attacks and may destroy 

 Finns a ii.sfriara and /'. moniana. Crie" has reported on a critical study 

 of the parasitic diseases of the apple. J. Kunckel '- has studied t he bio- 

 logical problems relative to the injury done maize, sorghum, and sugar 

 cane by the larva> of Sesamia noiiaf/rioidc.s. He recomnuMuls the destruc- 

 tion of all stubble before winter, and of all other seriously diseased 

 host plants in or about the field. 



[Concluded in next number.] 



'Compt. Rend., 122 (1896), p. 1012. 



2.Ionr. Agr., 2 (18!Hi), p. 578. 



3 Bui. Soc. Hot. Fr:iuce, ser. 3, 3 (18%), p. !l. 



iBul. Mill. Agr. Finuce, 15 (1896), p. 316. 



sCoinpt. Rend., 123 (1896), p. 7.58. 



'•Assoc. Fr. Av. Sci., C'ongri-s do Cartliaiic. 1S!M;. j.. 174. 



Mour. Agr. Prat., 2 (1896), p. 357. 



«Bul. Min. Agr. France, 15 (1896), p. KiO. 



"Ibid., p. 348. 



'"Compt. Rend., 122 (1896), p. 515 (K. S. K., 7, p. 835). 

 "Bui. Min. Agr. France, 15 (1896), p. 610. 

 '^Coiupt. Rend., 123 (1896), )). 842. 



