2002. 10 (1)




M. Arbabi, J. Singh

About authors:

M. Arbabi, Department of Agricultural Zoology Research, Plant Pests and Diseases Research Institute, P.O. Box 1454, Tehran-19395, Iran
J. Singh, Department of Agricultural Zoology and Entomology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221005, India


The authors are thankful to Dr. S К Gupta, Joint Director, Zoological Survey of India, Calcut-ta for identification of predatory mites.


Distribution, biology and feeding behavior of the predatory mite Agistemus industani (Acarina: Stigmaeidae) were studied with Tetranychus lude-ni being the prey mite on mulberry leaves. This predator was observed feeding voraciously on eggs of the prey in the field. One or two individuals of the predators were often recorded on mulberry leaves in the time period between September and Febru-ary. Under laboratory conditions, a fertilized fe-male produced female and male progeny in the ratio of 3:1 while an unfertilized female produced male progeny only. The ovipositional period ranged from 20 to 43 days when 42-98 eggs were depos-ited by a female. The total developmental period of a female predatory mite fed on eggs of T.ludeni varied from 11 to 17 days but it was 10-16 days in case of the male. The longevity of the adult female varied from 23 to 46 days, whereas the male lived 23-48 days. The feeding rate of the female predator was three times higher than that of the male. On an average 3 predator eggs were deposited per day after consumption of 15 prey eggs. The male pred-ator consumed nearly 6 eggs per day. The occur-rence and abundance of A.indutani during infesta-tion of T. ludeni (March-June) on vegetable crops suggests that it can be an efficient predator of this pest species.





Borthankur M. and Das S. C. 1987. Studies on Acarine predators of phytophagous mites on tea in northeast India // Two and Bud. No.34. P.21-24.

Clements D. R. and Harmsen R., 1990. Predatory behav-ior and prey stage preference of stigmaeid and phytoseiid mites and their potential compatibility on biological control // Can. Entomol. Vol.122. No.3-4. P.321-328.

Collyer E. 1964. Phytophagous mites and their predators in News Zealand orchards // N. Z. J. Agric. Res. Vol.7. P.551-568.

El-Badry E. A., Abo-Elghar M. R., Hassen S. M., and Kilany S. M. 1969a. Life history studies on the predatory mite Agistemus exsertusII Ann. Ent. Soc. Am. Vol.62. No.3. P.649-651.

El-Badry E. A., Abo-Elghar M. R„ Hassen S. M., and Kilany S. M. 1969b. Life history studies on the predatory mite Agistemus exsertus as a predator of two tetranychid mites // Ann. Ent. Soc. Am. Vol.62. No.3. P.660-661.

Gonzalea-Rodriguez R. H. 1965. A taxonomic study of the genera of Mediolata, Zetzellia and Agistemus (Acarina: Stigmaeidae) // Univ. Calf. Berkeley, Pub. Entomol. No.41. P. 1-64.

Gupta S. K. 1991. The mites of agricultural importance in India with remarks on their economic status. In: Dusbabek F. and Bukva V. (eds.) Modern Acarol-ogy, Prague and SPB Academic Pubi., The Hague, I. P.l-18.

Hafez S. M„ Rasmy A. S., and Elsawy S. A. 1983. Effect of a prey species and stages of predatory efficiency and development of stigmaeid mite Agistemus ex-sertus II Acarologia. Vol.24. No.3. P.281-283.

Kethley J. 1990. Acarina: Prostigmata (Actinedia). In: Soil Biology Guide. Dindal D. L. (ed.). A Wiley Interscience Pubi., John Wiley and Sons, New York. P.667-756.

McMurtry J. A. 1984. A consideration of the role of predators in the control of the acarine pests. In: Griffiths D. A. and Bowman С. E. (eds.), Acarolo-gy VI. Ellis Horwood Pubi., I. P.109-121.

Rasmy A. H„ Hafez S. M„ and Elsawy S. A. 1984. Biology and predatory efficiency of predaceous mites as affected by various biotic factors. In: Griffiths D. A. and Bowman С. E. (eds.), Acarolo-gy, VI Ellis Harwood Pubi., 2. P.699-702.

Santos M. A. 1975. Evaluation of Zetzellia mali as pred-ator of Panonychus ulmi and Aculus schelchttendali //Environm. Entomol. Vol.5. No.l. P.187-191.

Santos M. A. 1991. Searching behavior and association-al response of Zetzellia mali (Acarina: Stigmaei-dae) //Exp. Appi. Acarol. Vol.ll. No.l. P.81-87.

Santos M. A. and Laing J. E. 1985. Stigmaeid predators. In: Helle W. and Sabelis M. W. (eds.), Spider mites, their biology, natural enemies and control. Elsevier Science Pubi., Amsterdam. Vol. В. P.197-203.

Singh P., Somchoudhury K. A., and MuKherjee A. B. 1989. The influence of natural enemy complex on the population of Aceria litichii (Acari: Eriophyi-dae). In: Channa Basavanna G. P. and Viraktamath C. A., (eds.), Progress in Acarology, Oxford and IBH Pub., Co., New Delhi. Vol.2. P. 361-367.

White N. D. G. and Laing J. E. 1977. Some aspects of the biology and laboratory life table of the acarine predator Zelzillia mali II Can. Entomol. Vol.109. No.9. P.1275-1281.