| Effects of temperature and relative humidity on population fluctuation of Pronematus ubiquitus (Trombidiformes: Iolinidae) on mulberries and green beans of Kermanshah |
| Paper ID : 1107-IPCA5 (R1) |
| Authors |
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Azadeh Jamshidi *1, Maryam Darbemamieh2, Abbas Ali Zamani2 1Department of Plant Protection, College of Agriculture and Natural Resources, Razi University 2Razi University, Kermanshah, Iran |
| Abstract |
| The mite Pronematus ubiquitus (McGregor, 1932) is a predator and scavenger member in family Iolinidae. This small omnivorous mite can control some pests and diseases on different plants. It moves quickly on both sides of plant leaves and feeds on pollen, honeydew, small insects, fungi, Eriophyid mites and even some spider mites eggs. Therefore, conservation of this mites can be a positive step to reduce environmental pollution, maintaining human health, and producing organic products. The effect of temperature and relative humidity on population fluctuation of this mite on mulberry trees in faculty of agriculture and natural resources and one hectare farm of green bean bushes in same place in 2024 cropping season of Kermanshah was studied using linear and multiple regressions. These plants selected as a result of having abundant population of Pronematus mite in Kermanshah conditions. One leaf used as sampling unit and population density of mites examined weekly and regularly. Mean temperature and relative humidity extracted from Kermanshah meteorological station. Mean population density of mites calculated and population fluctuation graphs carried out. Based on the results of linear regression, the relationship between mite population fluctuation and temperature was not significant for beans, but significant and negative relationship was observed for mulberries. Also, the linear regression between relative humidity and mite population fluctuation was not significant for beans. Otherwise, a positive and significant relationship was observed for mulberries. In case of using multiple regression method, it showed the negative effect of temperature on population of P. ubiquitus mites residing on both host plant species and the positive effect of relative humidity on both studied hosts. However, this effect was not statistically significant on these host species. It seems that the effect of climatic changes on population fluctuation of these mites is not linear and may be the temperature and relative humidity are not the most important factors affecting the population of the Pronematus mites. Studying the impact of different affecting parameters on mite population fluctuation is important to adjust sampling programs and to estimate their population in integrated pest management programs of different crops. |
| Keywords |
| Tydeoidea, omnivorous mites, linear regression, biological control, seasonal activity |
| Status: Abstract Accepted |
