Several ecological factors that determine the survival of temperature resistant Phytoseius amba

Abstract

The ability of the predatory mite Phytoseius amba resistant temperature (results of superior applied research in 2018-2019) in controlling the spider mite Tetranychus urticae has not been stable in the long dry conditions in 2019. The instability of ability indicated by the decreased survival of temperature-resistant P. amba is closely related to various ecological factors, namely temperature, humidity, rainfall, sunshine intensity, leaf angle, density, and size cassava cultivar trichome and intra- and inter-species competition. Augmentation is an effort to release the mass of temperature-resistant P. amba predatory mites based on ecological factors. This biocontrol agent is still useful in playing a role in global warming conditions. The first-year research (2020) aims to determine the survival of P. amba resistant to temperature on a field scale and obtain key ecological factors that determine the survival of temperature-resistant P. amba local predator mites in cassava gardens in Banyumas Regency. The method used in the first year (2020) field-scale research was a survey with a random sampling technique. Samples were taken from the leaves of the Martapura cultivar in Cilacap. Data were analyzed using a randomized model variance analysis at an error rate of 0.1. The variance analysis results showed that among the temperature, humidity, rainfall, the density of adult T. urticae, nymphs, larvae, and eggs, the density factor of adult T. urticae mites was an ecological factor that determined the density of temperature-resistant P.amba mites on the field scale.