›› 2015, Vol. 58 ›› Issue (5): 553-558.doi:

• RESEARCH PAPERS • Previous Articles     Next Articles

Effects of environmental color on biological characteristics of Bradysia odoriphaga (Diptera: Sciaridae)

WANG Zhan-Xia1, FAN Fan1, WANG Zhong-Yan1, HAN Yan-Hua1, YANG Xiao-Fan1, WEI Guo-Shu1,2,*   

  1. (1. Agricultural University of Hebei, Baoding, Hebei 071001, China; 2. Biological Control Center of Plant Pests of Hebei Province, Baoding, Hebei 071001, China)
  • Online:2015-05-20 Published:2015-05-20

Abstract: 【Aim】 This study aims to clarify the effects of environmental colors on biological characteristics such as development and fecundity of Bradysia odoriphaga. 【Methods】 In laboratory conditions, the development and reproduction capability of B. odoriphaga were investigated in environments with different background color (black, brown, green, red and orange). 【Results】 The developmental duration of B. odoriphaga was the longest in orange environment (26.15 d), while was the shortest in black environment (22.35 d). The generation survival rate was the highest in black environment (43.88%) and lowest in orange environment (28.88%). There was no significant difference between sex ratios in environments with different background color. The adult longevity of both females and males was the longest in brown environment (2.06 d and 2.99 d, respectively) and shortest in orange environment (1.58 d and 2.57 d, respectively). The number of eggs laid per female was maximmal (62.99) in brown environment and the least (45.64) in orange environment. The indexes of population trend between different treatments (from high to low) were: black (15.90)>brown (15.07)>transparent contrast (12.93)>red (11.69)>green (11.67)>orange (8.50). 【Conclusion】 Environmental colors significantly influence the biological characteristics of B. odoriphaga. Black and brown environments facilitate its development and fecundity, while orange environment restrain both.

Key words: Bradysia odoriphaga, environmental color, developmental duration, survival rate, sex ratio, adult longevity, fecundity