142 PATHOLOGY [BoT. Absts., Vol. IX, 



902. Medalla, M. G., and G. M. Reyes. Fiji disease of sugar cane. Philippine Farmer 

 7: 3, 5. 1921. — The paper presents a discussion of Fiji disease to the sugar cane growers of the 

 Philippines. The disease is described and its recent introduction into the Philippines de- 

 monstrated. According to the authors it is at present confined to the Islands of Mindoro 

 and Luzon, The organism (suspected of being of protozoan nature) discovered by Dr. H. 

 L. Lyon is constantly associated with the disease. Control attempts in the Philippines have 

 been undertaken based upon: (1) A domestic quarantine of the affected provinces; (2) the 

 distribution of resistant varieties in provinces where the disease occurs; and (3) selection of 

 disease-free seed on affected plantations. — H. Atherton Lee. 



903. Melchers, L. E. Physoderma (zeae-maydis?) in Kansas. Trans. Kansas Acad. 

 Sci. 29: 131-132. 1920. — The presence of this fungus in Kansas on Zea mays is noted; 

 pertinent characteristics are given. — F. C. Gates. 



904. Melchees, L. E. Plant disease report for Kansas, 1917. Trans. Kansas Acad. Sci. 

 29: 132-138. 1920. — The paper contains a brief report of the distribution and severity of 25 

 cereal diseases, 11 vegetable diseases, 16 fruit diseases, and winter injury. — F. C. Gates. 



905. RamIrez, Roman. Viruela del algodon. [Cotton rust.] Rev. Agric. [Mexico] 

 5: 461. S fig. 1920. — Cotton rust caused by Aecidium gossypii E. & E. has caused losses to 

 growers in Coahuila and Duranga, Mexico. — John A. Stevenson. 



906. SiMONETTO, MoiSES. NuBvas orientaciones en sanidad vegetal. [New situations 

 in plant pathology.] Rev. Agric. Com. y Trab. [Cuba] 3: 349-356. ^ fig. 1920.— In part 1 

 of the paper are discussed the dangers of the importation of plant diseases and the preventive 

 measures that may be taken. A floating fumigation building is suggested and described. 

 In part 2 reference is made to a convention on plant sanitation held in Washington on Decem- 

 ber 20, 1920. In part 3 an outline is presented of urgently needed investigation on the con- 

 comitant causes of the mosaic of sugar-cane. In part 4 it is pointed out that in some cases 

 mosaic disease has caused losses reaching 50 per cent and is thus a real danger to Cuban sugar- 

 cane growers. One focus of infection located at the Mercedes plantation is said to have been 

 controlled. — F. M. Blodgett. 



907. Trujillo Pelufpo, Agustin. Desarrollo de las enfermedades criptogamicas en 

 las vifiedos durante el presente afio. [Fungous diseases in the v'neyards during the present 

 year.) Defensa Agric. [Uruguay] 2: 43-46. Sfig. 1921. — Powdery mildew (Ot'dzum), anthrac- 

 nose (Gloeosporiitm) , and downy mildew (Plasmopara) have caused heavy losses due in part 

 to weather conditions (high humidity) but to a larger extent to the failure of the growers to 

 spray at the right time and in a careful manner. — John A. Stevenson. 



THE HOST (RESISTANCE; SUSCEPTIBILITY; MORBID ANATOMY 



AND PHYSIOLOGY) 



908. HuRD, Annie May. Seed-coat injury and viability of seeds of wheat and barley as 

 factors in susceptibility to molds and fungicides. Jour. Agric. Res. 2V: 99-122. PI. 1S-2S. 

 1921. — An unbroken seed coat affords protection against attack of living seeds by Penicillium 

 sp. or Rhizopus nigricans either in damp storage, in the soil, or in blotter germinations; but 

 infection may occur on such seeds if germination is retarded by means of low temperature. 

 By means of artificial injuries, it is found that injury over the endosperm results fatally when 

 either organism is present and under any 1 of the 3 conditions mentioned, while an injury over 

 the embryo is not at all detrimental. Seeds that are dead or weakened from any cause are at- 

 tacked by these fungi even though the seed coat is intact. These fungi do not affect seeds 

 when the temperature is 10°C. or lower and Penicillium sp. requires an atmospheric humidity 

 of 80 per cent. Aspergillus sp. grows on wheat at a humidity of 70 per cent. — Seeds mechani- 

 cally injured and exposed to copper sulphate solution [3 per cent] are injured in 5 minutes 

 when the break is over the embryo and in 1 hour if the break is over the endosperm. — The dam- 



