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Tanganyika fungus list: recent records Nos. XVIII.

Wallace, G. B. ; Wallace, Maud M.

Mycological Circular. Department of Agriculture, Tanganyika 1954 No. 36 pp. 7 pp.;

Abstract

The new host and fungus records for Tanganyika mentioned in the first of these circulars [cf. R.A.M., 31, p. 225] and most of those in the second have already been noticed from other sources [34, p. 351]. The imperfect state of the rice foot rot organism (Gibberella fujikuroi) was observed for the first time on plants in the Rufiji area. A virus disease of tree tomato [Cyphomandra betacea] is considered by K. M. Smith to be new to science and is called Mbeya mottle virus. A hitherto unrecorded disease of papaw caused by a fungus declared a new species, Sphaceloma papayae, by A. Bitancourt and A. Jenkins, was found in a plantation near Moshi.
The third includes the following items. Fusarium oxysporum f. vasinfectum [F. vasinfectum], not previously recorded in the Territory, occurred in cotton at Geita and Lubaga in Lake Province. Maize rust (Puccinia polysora) [loc. cit.] was found in 1954 at Kisarawe, Bagamoyo, Moshi, and Arusha, again being more common at low altitudes particularly along the coast. Strain H (international strain 2) of Phytophthora infestans was identified in the potato variety 1792a (3) from Lushoto: this variety was immune from the strains previously known to be present [33, p. 250]. Strain I (3, 4) was identified by Dr. Black from tomato sent from Lyamungu in November, 1953. It is new to East Africa. Ratoon stunting virus [33, p. 382] was diagnosed in sugar-cane from two different localities. Other new records were Corynespora cassiicola on Salvia leucantha and Pyrenophora triticirepentis on wheat.