Temperature-dependent population growth of three species of stored product mites (Acari: Acaridida) |
| |
Authors: | Gamila Aspaly Vaclav Stejskal Stano Pekár Jan Hubert |
| |
Institution: | (1) Research Institute of Crop Production, Drnovská 507, Prague 6, 161 06, Czech Republic;(2) College of Science Elmarje, Gariunes University, Bengasi, Libya;(3) Department of Ecology, Charles University, Viničná 7, Praha 2, 142 00, Czech Republic;(4) Institute of Botany and Zoology, Masaryk University, Kotlářská 2, Brno, 61137, Czech Republic |
| |
Abstract: | The pest potential of stored product mites depends on the reproduction rate that is affected by the environmental conditions.
In this study we investigated the effect of temperature, ranging from 5 to 35°C, on the population growth of three important
mite species, Acarus siro, Tyrophagus putrescentiae and Auleroglyphus ovatus at 85% r.h. Starting with 10 individuals the population increase of mites was observed after 3 weeks of cultivation, or after
6 weeks for those kept at low temperatures (5, 10, 12.5, and 15°C). The rate of increase was calculated for each temperature
and species. The obtained data were fitted with polynomial models. The mite population growth rates increased with increasing
moderate temperatures until 25°C, when r
m
-values were 0.179, 0.177 and 0.190 for A. siro, A. ovatus and T. putrescentiae, respectively. The lower development threshold was 10.2°C in all three species. Estimated upper temperature threshold was
higher in T. putrescentiae (49°C) than in A. siro and A. ovatus (38°C). Simulation of the rate of population increase under ideal conditions, using real temperature records obtained from
Czech grain stores, showed that the pest mite populations increase only during 3.5 months within a typical 9-month storage
season in Central Europe. These results indicate that control of mites, be it chemical, physical or biological, is recommended
during the months when allergens and pests are produced, i.e. from September to mid November and in May. |
| |
Keywords: | Mites Grain Temperature Lower development threshold Storage Allergen |
本文献已被 PubMed SpringerLink 等数据库收录! |
|