Environmental management and biological aspects of the two eriophyoid fig mites Aceria ficus (Cotte) and Rhyncaphytoptus ficifoliae Keifer in Egypt

  • Abou-Awad B
  • El-Sawaf B
  • Reda A
 et al. 
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Mites associated with abandoned fig trees in Egypt were observed during
a 2-year study. This study included species diversity and seasonal
fluctuations as well as some biological aspects of common eriophyoid
species, Three phytophagous species consisted of the fig bud mite Aceria
ficus (Cotte), the fig leaf mite Rhyncaphytoptus ficifoliae Keifer and
the twospotted spider mite Tetranychus urticae Koch, representing a
basic trophic level, were fed upon by three of predacious mites
(Pronematus ubiquitus (McGregor), Amblyseius swirskii Athias-Henriot,
Agistemus exsertus Gonzalez), Population abundance of the injurious
mites were affected by the prevailing climatic conditions, action of
predators and leaf age. A control measure of one summer pesticide
(abamectin) application throughout the year seemed to be the most
successful management of harmful mites. Life table parameters showed
that the population of A. ficus multiplied 28.52 times in a generation
time of 17.90 days, while R. ficifoliae population increased 16.50 times
in a generation time of 14.61 days. Field and laboratory studies
indicated that the viviparity is a typical character in the reproduction
of R. ficifoliae.

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