Entomology Journal publishes original research papers and reviews from any entomological discipline or from directly allied fields in ecology, behavioral biology, 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

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... 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.