The effectiveness of removing fallen fruit on control of the oriental fruit fly Bactrocera dorsalis and evaluation of the infestation rate of this pest in five mango varieties.
Ye WenFeng, Li Lin, Xie ChangWei, Dong WenXia, Xiao Chun
Author Affiliation: Plant Protection Institute, Yunnan Agricultural University, Kunming 650201, China.
Chinese Journal of Applied Entomology 50 : 1126-1132
Abstract : The rate of infestation of five major mango varieties by the oriental fruit fly Bactrocera dorsalis (Hendel) was assessed in Yuanjiang, Yunnan, from June to August 2011. The results show that two varieties (Sannianmang and Red ivory) had the highest rate of infestation and largest number of oviposition apertures. Additional tests were conducted to evaluate the effectiveness of removing fallen fruit on fruit fly abundance. There was a significant positive correlation between the number of fallen fruits per square meter (X) and the number of male files (Y) captured by methyl eugenol (Me) (r1=0.884**, P1=0.000). The regression equation was Y=-1.675+449.701X-204.933X2+27.046X3 (R3=0.966, P=0.000). The relationship between the accumulated number of male files captured by Me (X) and the average infestation rate of mango fruits (Y) can be expressed as Y=0.003X0.721 (R2=0.953, P=0.000). Compared to the control group, the infestation rate and number of captured male flies in the treatment group were significantly reduced by 20% and 44%, respectively. Therefore, removing fallen fruit is recommended as an effective method of controlling this pest.