Population Dynamics of Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) on Common Potato Cultivars in Egypt.

Abd El-Nasser Hassan

doi:10.21608/eajbsa.2016.12766

Abstract

The field experiments were carried out at El-Berka village, Abu-Hommus, El-Beheira Governorate, Egypt during three Nile successive seasons, 2013, 2014 and 2015 to evaluate the susceptibility of potato cultivars to Polyphagotarsonemus latus and to throw light on population build up in relation to weather factors distribution within the potato plants. Present data showed that the high infestation of P. latus was recorded in October and November on the tested potato plants. The highest susceptible cultivars were represented by Spunta with mean number of 6.10 ±1.02 individuals /leaflet.The Moderate susceptible cultivar was represented by Sanura (3.66 ±0.59 individuals /leaflet). The lowest susceptible cultivar was represented by Pampa (3.60 ±0.34 individuals /leaflet). The results reflected that maximum, minimum and mean temperatures had negative effect on mite population. However, maximum, minimum and mean relative humidity and plant age had positive effect with the mite population on all potato varieties. The temperature, relative humidity and plant age were common factors affecting the development rate of various stages of mites.

Highlights

Potato, Solanum tuberosum L. is one of the most important vegetable crops in Egypt
The changes in the population activity of P. latus expressed as numbers of larvae, nymphs and adults/ potato leaflet at Beheira Governorate were expressed in Tables (1, 2) and Fig. (1) on three tested potato varieties and along three successive seasons, 2013, 2014 and 2015
Figure (1), P. latus was gradually increased toward the end of season in all potato varieties

Summary

Introduction

Solanum tuberosum L. is one of the most important vegetable crops in Egypt. Potatoes suffered from a characteristic leaf curl complex attributed to the attack of P. latus (Grinberg et al, 2005). Maximum, minimum and mean relative humidity and plant age had positive effect with the mite population on all potato varieties. The average number of P. latus individuals infesting Spunta cultivar of potato apparently increased from 0.04 individuals /leaflet at September, 3rd 2013 to 12.41 individuals /leaflet in November, 5th 2013 (Table 1 and Fig. 1).

Results

Conclusion