Abstract:
Objective Applicability of a newly developed system for monitoring Bactrocera dorsalis (Hendel) population at orchards of varied fruits was evaluated.
Methods Reliability of the system in determining B. dorsalis population dynamics was scrutinized by comparing the data collected with those captured by traps at respective guava, citrus or loquat orchards in Fujian. Validated data were used to characterize insect population dynamics and correlate with field meteorological measurements at each orchard by Pearson analysis.
Results There were no significant differences between the B. dorsalis counts obtained by the monitoring system and the conventional trapping method at the orchards. The data secured by the system also effectively differentiated the population dynamics at the orchards that grew different fruit plants. The B. dorsalis population generally significantly correlated with the local maximum, minimum, and mean temperatures, but not with humidity, precipitation or wind speed. However, at the guava orchard in Changtai, it was significantly affected by both maximum and mean humidity.
Conclusion The newly developed B. dorsalis monitoring system performed parallel to trap-capture. It satisfactorily provided a continuous automated real-time field detection and characterization of the population dynamics. Surrounding temperature at an orchard was identified as the critical environmental factor that affected the insect population.
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