Open AccessACROTHECIUM LEAF SPOT OF BASELLA RUBRA L.
Author(s) -
L. A. Alvarez García
Publication year - 1943
Publication title -
the journal of agriculture of the university of puerto rico/the journal of agriculture of the university of puerto rico
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 10
eISSN - 2308-1759
pISSN - 0041-994X
DOI - 10.46429/jaupr.v27i4.12882
Subject(s) - vine , biology , inoculation , horticulture , spots , leaf spot , botany , conidium , pathogenicity , microbiology and biotechnology
A leaf spot of Basella rubra L., caused by an Acrothecium species, not previously recognized in Puerto Rico nor probably elsewhere as a parasite of the above mentioned plant, is described in this paper. The parasite was found to produce leaf lesions within 5 to 7 days after inoculation with conidia obtained from pure cultures of the organism. Vine lesions were somewhat delayed in their appearance. Humid atmospheric condition accompanied by relatively high temperature, favored the incidence of the disease, as shown by pathogenicity tests conducted under glass house and field conditions. The foliage of heavily infected plants blighted in humid environment and became useless for consumption. Weekly sprayings with Bordeaux, 3-3-50 and 4-4-50, were found successful in controlling the disease, the latter formula giving better results under persistent humid conditions of the environment.