Biological and ecological studies on the soil predatory mite Holaspina solimani (Metwali) (Parholaspidae : Gamasida) [electronic resource].

Includes references.

An ecological and biological study was carried out on the predaceous soil mite Holaspina solimani ( Metwali), (Parholaspidae: Gamasida). Seven types of diets were used. Results showed that developmental duration between female and male did not vary much. Female life cycle ranged between 11 .9 and 15.7 days, while it was 11 to 14 days for male. Rhabditis scanica was the most suitable diet, as it gave the highest fecundity of 41 eggs / female. Increase of temperature from 20 to 30°C reduced developmental duration of all stages and the life cycle as well. Total egg deposition and daily rate were higher at 25°C than at 20 or 30°C, while longevity and life span were shorter at 25°C than the other two aforementioned degrees. Exposure to alternating temperature 10 / 20 and 15 / 20 was studied. Life cycle increased by 64 % and 47 % when the 2 regimes were used, respectively, compared with obtained values at only 20°C. Life span prolonged by 29 % and 17 %.

Summary in Arabic.

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