Publications

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sub-lethal effects of fenbutatin oxide on prey location by the predatory mite iphiseiodes zuluagai (acari: phytoseiidae).we used a y-tube olfactometer to assess the sub-lethal effects of the acaricide fenbutatin oxide on the olfactory response of the predatory mite iphiseiodes zuluagai towards odours from: (1) air or undamaged coffee plants; (2) undamaged or red spider mite oligonychus ilicis-infested coffee plants; (3) undamaged or false spider mite brevipalpus phoenicis-infested coffee plants. predatory mite adult females were exposed to residues of fenbutatin oxide or distilled water on leaf discs during a peri ...200919009359
beyond selectivity: are behavioral avoidance and hormesis likely causes of pyrethroid-induced outbreaks of the southern red mite oligonychus ilicis?secondary pest outbreak is a counterintuitive ecological backlash of pesticide use in agriculture that takes place with the increase in abundance of a non-targeted pest species after pesticide application against a targeted pest species. although the phenomenon was well recognized, its alternative causes are seldom considered. outbreaks of the southern red mite oligonychus ilicis are frequently reported in brazilian coffee farms after the application of pyrethroid insecticides against the coffee ...201323830118
ricoseius loxocheles, a phytoseiid mite that feeds on coffee leaf rust.one of the most important diseases of coffee plants is the coffee leaf rust fungus hemileia vastatrix berkeley and broome (uredinales). it can cause 30 % yield loss in some varieties of coffea arabica (l.). besides fungus, the coffee plants are attacked by phytophagous mites. the most common species is the coffee red mite, oligonychus ilicis mcgregor (acari: tetranychidae). predatory mites of the phytoseiidae family are well-known for their potential to control herbivorous mites and insects, but ...201424744058
response of the predatory mite phytoseiulus macropilis (banks) to volatiles produced by strawberry plants in response to attack by tetranychid mites (acari: phytoseiidae: tetranychidae).the attack of phytophagous mites may induce plants to produce volatiles, which in turn may attract predators. the occurrence of multiple phytophagous infestations on plants may influence predator response. in this paper, we investigated whether the attraction of the predatory mite phytoseiulus macropilis (banks) to phytophagous-infested plants would change with the simultaneous presence of two tetranichid mites oligonychus ilicis (mcgregor) and tetranychus urticae koch. while the former species ...201020498963
inhibition of herbivory on young holly leaves: evidence for the defensive role of saponins.response of the southern red mite, oligonychus ilicis mcgregor, to young and one year old leaves of ilex opaca aiton was studied on three dates during the period of leaf expansion in the spring. young foliage, which is rich in nutrients but also contains high levels of saponins, was found to be unsuitable for colonization by this oligophagous herbivore until the leaves had matured and levels of saponins had declined. mites preferentially colonized and had higher survival and reproduction on scle ...198928312577
lethal and sub-lethal selectivity of fenbutatin oxide and sulfur to the predator iphiseiodes zuluagai (acari: phytoseiidae) and its prey, oligonychus ilicis (acari: tetranychidae), in brazilian coffee plantations.lethal concentration (lc) has been widely used to estimate pesticide toxicity. however, it does not consider the sub-lethal effects. therefore we included the instantaneous rate of increase in association with lc to estimate population-level effects of the acaricides fenbutatin oxide and sulfur on the predator iphiseiodes zuluagai and its prey, the phytophagous southern red mite, oligonychus ilicis. the predator was 32.84x and 17.20x more tolerant to fenbutatin oxide and sulfur, respectively, th ...200516082924
predatory potential of euseius alatus (phytoseiidae) on different life stages of oligonychus ilicis (tetranychidae) on coffee leaves under laboratory conditions.this study evaluated the predatory capacity of euseius alatus (deleon) as a biological control agent of the pest mite oligonychus ilicis (mcgregor) on coffee leaves under laboratory conditions, using arenas containing 25 o. ilicis per coffee (coffea arabica) leaf to one specimen of each stage of the predator mite. the functional response and oviposition rate of adult females of e. alatus were evaluated on coffee leaf arenas and offered from 1 to 125 immature stages of o. ilicis per arena. the nu ...201323949753
[influence of the webbing produced by oligonychus ilicis (mcgregor) (acari: tetranychidae) on associated predatory phytoseiids].oligonychus ilicis (mcgregor) is among those mite species that can cause damage to coffee plants (coffea spp.). species of phytoseiidae acari are considered the most important and studied predatory mites. the objective of this study was to evaluate the effects of the webbing produced by o.ilicis on its predation by females of the phytoseiids iphiseiodes zuluagai denmark & muma, euseius citrifolius denmark & muma and amblyseius herbicolus (chant). four bioassays were conducted, with three treatme ...201020305904
[spatial distribution of phytophagous mites (acari: tetranychidae) on strawberry plants].many phytophagous mites can attack strawberry plants, fragaria x ananassa, among them the southern red mite, oligonychus ilicis mcgregor, and the two-spotted spider mite, tetranychus urticae koch. they are found together feeding on the same plant on the upper and underside of the leaves, respectively. here we studied the choice for feeding sites of o. ilicis and t. urticae on strawberry plants. the first hypothesis tested whether the feeding site choice would be related to the fitness of the spe ...200718060306
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