Lu YongYue

Foraging behavior and recruitment of red imported fire ant Solenopsis invicta Buren in typical habitats of South China

Abstract The foraging behavior consisted of three steps: searching, recruitment and transportation. Searching time was different for different foods; searching time for honey was longer than that for any other food tested. It was also affected by habitats with the searching time of fire ants in a litchi orchard being significantly longer than that for other habitats (p

Life-History Traits and Population Relative Fitness of Trichlorphon-Resistant and -Susceptible Bactrocera dorsalis (Diptera: Tephritidae)

Life tables were established for trichlorphon-resistant and susceptible Bactrocera dorsalis strains based on the laboratory observations. Trichlorphon-resistant B. dorsalis strain had longer pupal and preoviposition periods, and mean generation time compared to the trichlorphon susceptible strain. Lower fecundity, emergence rate, and probability of standard fecundity 𝑃𝐹, and shorter female and male longevity also were apparent in the trichlorphon resistant strain. Based on the life tables, the life population trend index (𝐼) of the resistant strain was 86.80, while that of the susceptible strain was 116.97. The net reproduction rate (𝑅0) and the intrinsic rate of increase (𝑟𝑚) of the resistant strain were 1565.33 and 0.0164, while those of susceptible strain were 2184.00 and 0.0173, respectively. The results from this research revealed that the resistant strain was at a reproductive and developmental disadvantage relative to the susceptible strain.