Virulence of green leafhopper (GLH) from Luzon, Philippines on IR 36 and IR 42

A colony that was significantly bigger than the greenhouse colony on IR 36 or IR 42 indicated an increase in virulence of that colony. Colonies from all locations except Cuyapo, Nueva Ecija; San Fernando-Bacnotan, La Union; and Pidigan, Abra were more virulent on IR 36 than the greenhouse colony. On...

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Bibliographic Details
Published inInternational rice research newsletter Vol. 11; no. 1
Main Authors Rapusas, H.R, Heinrichs, E.A. (International Rice Research Inst., Los Banos, Laguna (Philippines). Entomology Dept.)
Format Journal Article
LanguageEnglish
Published 01.02.1986
Subjects
FILIPINAS
NEPHOTETTIX
ORYZA SATIVA
PHILIPPINES
VIRULENCE
VIRULENCIA
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Summary:A colony that was significantly bigger than the greenhouse colony on IR 36 or IR 42 indicated an increase in virulence of that colony. Colonies from all locations except Cuyapo, Nueva Ecija; San Fernando-Bacnotan, La Union; and Pidigan, Abra were more virulent on IR 36 than the greenhouse colony. On IR 42, all colonies except those from Capas, Tarlac; Umingan, Pangasinan; and Paoay-Badoc, Ilocos Norte were more virulent than the greenhouse colony. In contrast to 1979 survey, results indicate that GLH colonies collected in most of the provinces were more virulent than the greenhouse colony. Populations were about double those of the greenhouse colony on both IR 36 and IR 42. Therefore, GLH biotypes are developing in the Philippines. Because IR 36 and IR 42 have low level of resistance to tungro virus (RTV), but have resistance to the vector GLH, there is the potential for higher RTV incidence on IR 36 and IR 42 in the locations where GLH colonies are most virulent
Bibliography:H10
8611345
ISSN:0115-0944