Predatory activity of phytoseiid mites on the developmental stages of coffee ringspot mite (Acari: Phytoseiidae: Tenuipalpidae)
By means of bioassays performed in arenas of 3 cm in diameter, manufactured with coffee leaves floating on water, the phases of the coffee ringspot mite Brevipalpus phoenicis (Geijskes) were studies on the preference by several developmental stages of the predaceous mites Euseius alatus DeLeon and Iphiseiodes zuluagai Denmark & Muma. The experiment was conducted in laboratory at 25°2°C, 70°10 percent RH and 14 h photophase. The preferred stage of coffee ringspot mite was the larva, followed by the nymph and egg. Adults were least preyed on. In general, the most aggressive phase of the predators was the adult female followed by the nymph; the larval phase was the least aggressive. The average predation of E. alatus and I. zuluagai for the different phases of B. phoenicis were, respectively: larva (79 percent and 90 percent) major who egg (47 percent and 83 percent) major who nymph (40 percent and 77 percent) major who adult (1 percent and 18 percent). This result indicated that I. zuluagai is more aggressive than E. alatus in relation to its predation upon B. phoenicis.
| Main Authors: | , , |
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| Format: | biblioteca |
| Published: |
2000
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| Subjects: | COFFEA, BREVIPALPUS PHOENICIS, BIOENSAYOS, TRANSMISION DE ENFERMEDADES, ENFERMEDADES DE LAS PLANTAS, ORGANISMOS PATOGENOS, DEPREDADORES, VECTORES, VIRUS DE LAS PLANTAS, |
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