Factors Affecting The Population Density of The Two-Spotted Spider Mite ,Tetranychus Urticae Koch on Cucumber Plants in Sohag Governorate. العوامل المؤثرة على کثافة تعداد اکاروس العنکبوت الاحمر ذو البقعتین على نباتات الخیار بمحافظة سوهاج

Document Type : Original Article

Authors

1 Plant protection Department , Faculty of Agriculture, Sohag University, Egypt

2 Plant Protection Department, Faculty of Agriculture, Assiut University, Egypt.

3 Plant Protection Department (Agricultural Zoology), Faculty of Agriculture, Sohag University, Egypt.

Abstract

The population abundance of the two-spotted spider mite, Tetranychus urticae that infest cucumber plants in upper-Egypt was investigated  during  spring plantations of 2015 and 2016 season. Data showed that the population of the spider mite population varied in its  density during the entire season of both seasons with a peak  number occurrence the end of season (May 30 ), when plant age was  90 day-old when temperature  and relative humidity were in moderate levels. Also, this study revealed that the cucumber  plants  highly impacted by the pest in addition to the few number of predators were observed during these seasons. The abiotic factors, e.g. temperature, relative humidity, and the plant age, more likely to induce the infestation than the biotic factors (predators). Accordingly, further studies are needed to examine the factors affecting the population of this pest. This study may be useful for determining the timing of the control program for T. urticae that infest cucumber plants during spring plantations.

Keywords

Journal of Plant Protection and Pathology
Volume 11, Issue 10
October 2020
Pages 511-513

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