Effects of prey mites and pollen on the biology and life tables of Proprioseiopsis asetus (Chant) (Acari, Phytoseiidae)

Abstract

Biology of the phytoseiid mite Proprioseiopsis usetus was studied under laboratory conditions. Egg hatchability was tested at three different combinations of temperature and relative humidity. A combination of 26'C and 70% RH was the most suitable condition. The number of citrus brown mite Eutetranychus orientalis (Klein) consumed by P. asetus adult females significantly decreased when date palm pollen Pheonex dactylefira L. was added to prey mite and egg production significantly increased. Total developmental time of P. crsrtus ranged between 3.25 and 5.33 days for males and between 3.83 and 5.46 days for females at 26' C. The percentage of female progeny in the total population ranged between 52% and 57%. A diet of E. orientalis resulted in the shortest generation time (T = 12.49 day), the shortest adult female longevity (27.25 day), the highest net reproductive rate (R, = 35.15 expected progeny per female), the highest intrinsic rate of natural increase (r, = 0.28) and also finite rate of increase (elm = 1.33) per day. Diet of prey mite T. urticae provided the longest adult female longevity (33.08 days) and T. urticae or P. dactyle$re pollen provided very close life table parameters of P. asetus. Broad mite Polyphagotarsonemus latus was the least favourable food source with results of T = 16.89 days; Ro = 21.02 female progeny per female; r, = 0.18 and e'm = 1.19 per day.

Effects of contrasting diets and temperatures on reproduction and prey consumption by Proprioseiopsis asetus (Acari: Phytoseiidae)

“…Similar results were obtained for some other phytoseiids (Badii and McMurtry 1984;Takahashi and Chant 1992). However, Fouly (1997) reported that 26°C with 70% RH was the optimum temperature for P. asetus egg hatch.…”

“…4). Fouly (1997) reported similar data for P. asetus males and females fed four different phytophagous mite species at 26°C. The range for the sexes at specific life stages across the four host species was egg: 26-38%, larva: 14-18%, protonymph: 22-26% and deutonymph: 25-31%.…”

“…that have been studied are P. temperellus (Muma and Denmark) fed Tetranychus urticae Koch (Acari: Tetranychidae) eggs alone at various temperatures (Ball 1980), P. cannaensis (Muma) fed T. urticae (+pollen and honey) studied for egg hatching at various relative humidities (Bakker 1993), P. mexicanus (Garman) population increase when fed T. urticae eggs (Megevand et al 1993) and P. rotundus (Muma) fed all stages of T. urticae and various pollen for development times at one temperature and intrinsic rate of increase (Abou-Setta et al 1997). Previous research on the biology (e.g., developmental time, egg hatch rate, sex ratio and intrinsic rate of increase) of P. asetus (Chant) when fed citrus brown mite, Eutetranychus orientalis (Klein) or T. urticae was reported by Fouly (1997).…”

<p><strong>Effects of temperature on development and reproduction of <em>Neoseiulus bicaudus</em> (Phytoseiidae) feeding on <em>Tetranychus turkestani</em> (Tetranychidae)</strong></p><p><strong><em><br /></em></strong></p>

“…The intrinsic rate of increase recorded in the current experiment for N. bicaudus at 26 ºC and 35 ºC (0.24 and 0.40, respectively), were considerably higher than the values obtained by Fouly (1997) and Emmert et al (2008) for Proprioseiopsis asetus at 26 ºC and 35 ºC (0.18-0.28 and 0.17-0.32, respectively).…”

Ciclo de vida de Proprioseiopsis cannaensis (Muma) (Acari: Phytoseiidae) com diferentes tipos de alimentos

“…Gerson et al (2003) afirmaram que os eriofiídeos constituem somente parte da dieta diversifi cada de muitos fi toseídeos, não sendo muito comum a preferência desses predadores por ácaros pertencentes àquela família de ácaros fi tófagos. São poucos os estudos sobre a biologia de Proprioseiopsis Muma (Ball 1980, Abou-Setta et al 1997, Fouly 1997 Brevipalpus phoenicis não se mostrou favorável para permitir o crescimento signifi cativo da população de P. cannaensis. Os valores de R o , r m , e λ foram muito baixos quando esse predador foi alimentado com aquele tipo de alimento.…”