Population dynamics of white peach scale, Pseudaulacaspis pentagona and its important enemies in Mazandaran province.

مهدیه, بذرافشان and دكتر جبرائيل, رزمجو and دکتر محمدرضا, دماوندیان and دكتر علی اصغر, فتحی and مهندس نادر, قائمی (2009) Population dynamics of white peach scale, Pseudaulacaspis pentagona and its important enemies in Mazandaran province. Masters thesis, University of Mohaghegh Ardabili.

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Abstract

In this research, the biology of mulberry scale, Pseudaulacaspis pentagona Targioni, was studied on peach and kiwi plants in field conditions. The results showed that, P. pentagona has three generations per year and overwinters as fertile famales. Peak of the pest density on peach observed in the first generation in April and on kiwi in third generation. Also, the development time and fecundity of the pest were investigated on peach, kiwi and mulberry. The development time of female was generally longer on peach and shorter on kiwi. The development time of male had no significant differences among three hosts tested. Fecundity of mulberry scale had significant differences among kiwi, peach and mulberry hostes. Fecundity was higher on peach than on other hosts. Prospaltella berlesei and Chilocorus bipustulatus were the most common natural enemies of mulberry scale. When parasitism rate and population of predator increased, population of this pest would decreased. Also, the parasitism rate of mulberry scale by P. berlesei was higher in kiwi than peach garden. And the population of C. bipustulatus was higher in peach than kiwi garden.

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