Some host factors affecting inoculation of cacao seedlings with Verticillium dahliae
Studies on some host factors that affect the incidence of infection in cacao (Theobroma cacao L.) by Verticillium dahliae Kleb. have shown that susceptibility to systemic infection increased with increased in age of seedlings. Incidence of infection was significantly higher when roots of plants were wounded before inoculation or when the whole, rather than part of the root system was inoculated. Incidence of infection was significantly reduced by high atmospheric humidity, defoliating plants three weeks before inoculation, defoliating at time of inoculation provided that subsequently produced leaves were removed, and girdling stems two weeks prior to inoculation. It was unaffected by girdling stems at time of inoculation or defoliation at time of inoculation if leaves produced after inoculation were not removed. Variety Trinitario was more susceptible than Amazonian or Amelonado when inoculated at low, but not at high, inoculum density
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| Format: | biblioteca |
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1975
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| Subjects: | THEOBROMA CACAO, PLANTULAS, VERTICILLIUM DAHLIAE, ENFERMEDADES FUNGOSAS, INOCULACION, EDAD DE LA PLANTULA, RESISTENCIA A LA ENFERMEDAD, TRANSPIRACION, CLONES TRINITARIOS, CLONES AMELONADOS, CLONES DEL ALTO AMAZONAS, UGANDA, |
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