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Acta Prataculturae Sinica ›› 2014, Vol. 23 ›› Issue (5): 279-286.DOI: 10.11686/cyxb20140533

• Orginal Article • Previous Articles     Next Articles

Effects of sublethal dosage of imidacloprid, abamectin and beta-cypermethrin on the development and reproduction of green of the morph of pea aphid (Acyrthosiphon pisum)

WANG Xiao-qiang,LIU Chang-zhong,XING Ya-tian,SHI Zhou   

  1. College of Pratacultural Science, Key Laboratory of Ecosystem Ministry of Education, Sino US Center for Grazingland Ecosystem Sustainability, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2013-10-11 Online:2014-10-20 Published:2014-10-20

Abstract:

To understand the effects of sublethal dosage of imidacloprid, abamectin and beta-cypermethrin on the experimental population parameter of green morph of pea aphid [Acyrthosiphon pisum (Hemiptera: aphidiae)], and to investigate the relationship between the development, reproduction of A. pisum and sublethal dosage, which can provide a theoretical basis for comprehensive control of A. pisum. Sublethal dosage of imidacloprid, abamectin and beta-cypermethrin on A. pisum were examined by leaf with insect dipping method and disc leaf dipped method respectively under constant temperature (22-24)℃, relative humidity (70%-80%) and a 16∶8 (L∶D) hours photoperiod. The results showed that mean longevity and fecundity of the adults treated by two concentrations (LC20 and LC10) of three kinds of insecticides were significantly lower than those of the control (P<0.05). Both the mean longevity and the fecundity of the adults treated by abamectin (LC20) and beta-cypermethrin (LC20) reached its minimum, which were 3.34 days and 14.30 heads, respectively. However, no significant regulations were found on the durations of different developmental stages of F1 generation nymphs except that the third instar had no significant differences (P>0.05), while the adult stage, mean longevity, survival rate, mean fecundity, net reproductive rate (R0) and mean generation time (T) of F1 generation treated by concentrations (LC10) were larger than concentrations (LC20) of three kinds of insecticides. Especially, the adult stage, mean fecundity of adults, net reproductive rate (R0) and mean generation time (T) of F1 generation treated by abamectin (LC10) reached its manimum value, which were 9.76, 77.76, 65.32, 12.41 respectively, were larger than those of the control. All these results showed that both of the mean longevity and fecundity of adults were decreased, while most life table parameters of F1 generation improved with decrease of sublethal dosage after the adults were treated by different sublethal dosages of imidacloprid, abamectin and beta-cypermethrin.

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