Antibiosis of maize inbred lines to the carmine spider mite, tetranychus cinnabarinus |
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| Authors: | Y Tadmor E Lewinsohn F Abo-Moch A Bar-Zur F Mansour |
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| Institution: | (1) Dept. of Maize Genetics, ARO, Newe Ya’ar Research Center, 30095 Ramat Yishay, Israel;(2) Dept. of Aromatic, Medicinal and Spice Crops, ARO, Newe Ya’ar Research Center, 30095 Ramat Yishay, Israel;(3) Dept. of Entomology, ARO, Newe Ya’ar Research Center, 30095 Ramat Yishay, Israel;(4) Galilee Seeds Research and Development, 25201 Mobile Post Ashrat, Israel |
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| Abstract: | The antibiosis of tenZea mays L. inbred lines to the carmine spider mite,Tetranychus cinnabarinus (Boisduval) (Acari: Tetranychidae), was evaluated. Two maize inbred lines previously reported as resistant to this spider
mite and a susceptible inbred line were compared with B96 (formerly called 41:2504B), reported as being resistant to the two-spotted
spider mite T. urticae and to the European corn borer (Ostrinia nubilalis Hübner). Other lines were derived from B96. All lines originated in the U.S.A. and were tested in Israel at two different
growth stages. Four days after inoculation of detached leaf squares with adult mites, significant differences in susceptibility
were observed among lines. At the 3-leaf stage lines B68, B96, B79, A619, B65, B49 and B64 reduced the average mite daily
fecundity by 43%, 64%, 66%, 67%, 77%, 81% and 87%, respectively, as compared with the most susceptible line, B52. At the flowering
stage, the average reduction in mite daily fecundity was much lower: inbred lines B64, A619 and B96 reduced the average mite
daily fecundity by 48%, 51% and 86%, respectively, whereas the seven other genotypes had an intermediate or a susceptible
reaction to the carmine spider mite, with A661 being the most susceptible. Our results show that B96 could be used as a source
of resistance in developing improved resistance of inbred lines of maize to carmine spider mites. |
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| Keywords: | Tetranychus cinnabarinus carmine spider mite antibiosis resistance maize |
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