Premium
Resistance‐Susceptibility of Maize Genotypes to Artificial Infestations by Twospotted Spider Mites
Author(s) -
Kamali K.,
Dicke F. F.,
Guthrie W. D.
Publication year - 1989
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1989.0011183x002900040020x
Subject(s) - spider mite , tetranychus urticae , biology , pest analysis , infestation , antibiosis , horticulture , spider , agronomy , zoology , genetics , bacteria
Twospotted spider mites, Tetranychus urticae K., are pests of maize, Zea mays L., in some areas of the USA. Resistant genotypes are needed to reduce plant damage caused by this pest. Two laboratory and three field experiments were conducted in 1986 to determine the resistance‐susceptibility of maize genotypes to an artificial infestation by the twospotted spider mite. Inbred line 41:25046 was highly resistant to the twospotted spider mite in both laboratory and field tests. This inbred exhibited a high degree of antibiosis against the mite; few mites survived, and little leaf damage resulted from the artificial infestation. This inbred also is highly resistant to the European corn borer, Ostrinia nubilalis Hiibner, and has been used as a nonrecurrent parent to develop several genotypes of maize resistant to this pest. Our data show that 41:25048 also could be used to develop genotypes of maize resistant to twospotted spider mites. Nine other genotypes had intermediate or susceptible reactions to twospotted spider mites, with Mol7 being the most susceptible.