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- Title
Effect of drought stress on the population dynamics of Bradysia cellarum.
- Authors
WANG Bao-Shan; SUN Li-Juan; WANG Ying-Lei; ZHENG Chang-Ying
- Abstract
[Objectives] To determine the effect of drought stress on the growth, development, reproduction and population dynamics of Bradysia cellarum Frey. [Methods] Based on an age-stage, two-sex life table, the life table and fecundity parameters of B. cellarum were calculated under dry and wet soil conditions. The effects of drought stress were further verified using a drought treatment experiment during the adult stage. [Results] Drought treatment significantly prolonged the developmental duration of the egg, 1st instar, 2nd instar and pupal, stages relative to the control group (P<0.05). Furthermore, female fecundity was 37.8% less than that of the control group. The net reproductive rate (R0), intrinsic growth rate (r) and limited growth rate (A) were also significantly less in the drought treatment group than in the control (P<0.05). The oviposition rate and number of eggs laid by the drought treatment group were 5% and 1.30, respectively, significantly less than the corresponding values of 100% and 85.50 for the control group (P<0.05). Eggs failed to hatch when adults were unable to obtain juice from chives. [Conclusion] The population dynamics of B. cellarum are adversely affected by drought conditions and populations are unable to survive if the relative soil moisture content is 10% or less. These results provide a scientific basis for controlling B. cellarum through managing soil moisture content.
- Subjects
DROUGHTS; POPULATION dynamics; SOIL moisture; DROUGHT management; LIFE tables; SOIL wetting
- Publication
Chinese Journal of Applied Entomology, 2023, Vol 60, Issue 1, p245
- ISSN
2095-1353
- Publication type
Article
- DOI
10.7679/j.issn.2095-1353.2023.027