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Articles by A.H. Fouly
Total Records ( 5 ) for A.H. Fouly
  A.H. Fouly and S.M. Al-Rehiayani
  Incidence of predaceous mite species inhabiting different habitats were recorded in Saudi Arabia for the first time in 2008-2009. Predatory mites were mounted, classified and identified in Zoology Lab at the College of Agriculture and Veterinary Medicine, Qassim University. Thirty one predaceous mites were collected from samples of plant shoot and root systems of cultivated plants, debris and organic manure in Al-Qassim region. These mite species belong to three suborders, 16 families and 29 genera. Acarid mites represented 6.46%, Actendid mites represented 25.8%, while Gamasid mites, which was the most abundant group of predaceous mites, represented 67.74% of the whole collected species during the study. Occurrence, site of collection, habitat and remarks of predatory mites are listed. The surveyed mite species are considered new records for the Saudi fauna. Illustration and description of the two new laelapid species, Hypoaspis zaheri; H. dactylifera are included.
  A.H. Fouly , M.A. Al-Deghairi and N.F. Abdel Baky
  Development, feeding capacity and life table parameters of the predatory mite Typhlodromips swirskii (Athias-Henriot) fed three different levels of whitefly eggs Bemisia tabaci Genn. were studied under laboratory conditions of 26°C and 70% RH. Both organisms were collected from eggplant leaves growing in an greenhouse in Al-Qassim region, center of Saudi Arabia in 2009. In leaf disc assays, increasing number of prey eggs accelerated the development of T. swirskii. Duration of developmental stages and feeding capacity of T. swirskii were significantly affected by the number of whitefly eggs offered. During an ovipositional period of 13.1, 18.9 and 19.5 days, adult female of T. swirskii consumed an average of 41.6, 128.4 and 140.1 prey eggs when each female was provided with 4, 8 and 12 prey eggs day-1 and laid an average of 10.5; 12.8 and 15.7 eggs day-1, respectively. Offering the predatory mite with 4, 8 and 12 prey eggs day-1 caused a mean generation time (T) of T. swirskii was 17.15; 17.66 and 15.45 days while, the net reproductive rate (Ro) averaged 10.86, 20.98 and 22.12 female progeny/female and the intrinsic rate of increase (rm) of T. swirskii was 0.22, 0.17 and 0.14 female progeny/female/day, respectively. The finite rate of increase erm (λ) was at its highest level (1.23) when T. swirskii individuals was provided with 12 eggs day-1 and declined to 1.19 and 1.15 after feeding on 8 and 4 prey eggs day-1, respectively. Crowding of T. swirskii significantly decreased feeding capacity and egg deposition.
  A.H. Fouly , O.A. Nassar and M.A. Osman
  Eusieus scutalis (A.-H.), is a common phytoseiid mite in Egypt. However, the present study aims to throw more light on the biology and life table parameters of E. scutalis which was reared under laboratory conditions of 26°C and 70% R.H., on palm pollen, immature stages of Tetranychus urticae koch and Bemisia tabaci Genn. Life cycle averaged 5.20 and 6.19 days, 6.40 and 7.23 days, 7.30 and 7.85 days for male and female when fed on palm pollen, immature stages of T. urticae and B. tabaci, respectively. The highest R0 value of 17.88 expected female progeny per female was obtained with a diet of date palm and followed by 16.03 and 13.60 for T. urticae and B. tabaci, respectively. The intrinsic rate of natural increase (rm) and subsequently, the finite rate of increase (erm) averaged 0.232-1.26; 0.191-1.21 and 0.175-1.91 when E. scutalis was provided with date palm pollen, T. urticae and B. tabaci, respectively. Date palm pollen shortened the mean generation time and caused the highest rates of R0, rm and erm parameters followed by a diet of T. urticae. While B. tabaci proved to be the least favorite food source for E. scutalis.
  A.H. Fouly and S.M. Al-Rehiayani
  Cosmolaelpas qassimensis sp. nov. was collected from soil samples containing leaf litter and soil surrounding the root system of date palm trees during 2013-2014 in Qassim, Saudi Arabia. Monthly survey showed that C. qassimensis was at its highest rate of occurrence (13.96 individuals/ sample) in September. There were no significant differences between average number of mites collected in May, July, August and October, while it was rarely found (1.25 and 0.96 mites/ sample) in January and February, respectively. Immature stages and adult female and male of C. qassimensis sp. nov. were extracted from a pure laboratory culture, which were maintained feeding on the acarid mite, Tyrophagous putrescentiae Schrank and kept at 26±1°C and 70±5% RH. They were illustrated and identified.
  A.H. Fouly and N.F. Abdel-Baky
  The present study aims to determine different biological aspects of the new laelapidae mite Cosmolaelaps qassimensis which was collected from Qassim area in (2013-2014) and fed on the two acarid mites, Tyrophagus putrescentiae (Schrank) and Caloglyphus rodriguez Samsinak and compared with the egg masses of root-knot nematode, Meloidogyne incognita chitwood as food sources under laboratory conditions of 26±1°C and 70±5% RH. The incubation period of male and female eggs averaged 2.7 and 2.99 days, respectively. Female life cycle was significantly shorter when it fed on T. putrescentiae followed by C. rodriguez and then egg masses of M. incognita. Life span of female was sub-equal, when C. qassimensis fed on either T. putrescentiae or C. rodriguez and significantly shorter, than those on M. incognita. Male life cycle, longevity and life span were significantly shorter when C. qassimensis fed on T. putrescentiae followed by C. rodriguez and egg masses of nematode. The total number of eggs per female feeding on T. putrescentiae was significantly higher than on C. rodriguez and followed by M. incognita. Mean generation Time (T) and the time required for the population of C. qassimensis to double its number (DT) were shorter when it fed T. putrescentiae than on C. rodriguez and M. incognita. Net reproductive rate (Ro), the Gross Reproductive Rate (GRR), intrinsic rate of increase (rm) and finite rate of increase (erm) were higher, when C. qassimensis fed T. putrescentiae and C. rodriguez while, these parameters were at their lowest rates, when C. qassimensis fed egg masses of M. incognita. Tyrophagus putrescentiae proved to be the most suitable food source to obtain the largest numbers of offspring of the predatory laelapidae mite C. qassimensis.
 
 
 
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