Effect of a lethal concentration of deltamethrin on the growth and nutrient content of Acyrthosiphon solani nymphs
Author of the article:GAO Yun-Lei;HAN Lan-Lan;ZHAO Kui-Jun;ZHANG Wen-Lin;XIAO Jian-Fei;CHEN Juan;GAO Li-Tong;DENG
Author's Workplace:College of Agriculture, Northeast Agricultural University;College of Agriculture, Northeast Agricultural University;College of Agriculture, Northeast Agricultural University;College of Agriculture, Northeast Agricultural University;College of Agriculture, Northeast Agricultural University;College of Agriculture, Northeast Agricultural University;College of Agriculture, Northeast Agricultural University;College of Agriculture, Northeast Agricultural University
Key Words:Acyrthosiphon solani; lethal concentration; deltamethrin; instar sduration; energy substances
Abstract:
[Objectives] To investigate the effect of deltamethrin on
the growth, development and energy storage of 1st instar nymphs of Acyrthosiphon solani Kaltenbach and
thereby provide a theoretical basis for research pesticide resistance
mechanisms in this pest. [Methods] First instar nymphs of A. solani were treated with an LC50 dose of deltamethrin
via the impregnation method after which the growth of successive instars was
monitored every 12 h. In addition, the protein, carbohydrate and total lipid of
each nymph was measured by staining these with anthrone, coomassie brilliant
blue G-250 and vanillin, respectively. [Results] We found that deltamethrin significantly
extended the growth period of 1st and 2nd instar nymphs by 1.44 times and 1.26
times, respectively (P < 0.05). There was also a significant
difference in the specific gravity of protein between treatment and control
groups in 2nd (0.74 times), 3nd (0.69 times) and 5th instar (1.17 times)
nymphs. The protein content of other treated instars also differed from their
respective control group, but not significantly. There was also a significant difference in
the specific gravity of soluble carbohydrate between 2nd instar treatment and
control groups (1.39 times). Glycogen differed significantly
between treatment and control groups in the 1st (3.81 times) and 2nd instars (3.82 times). Finally, total lipid content
significantly differed between the treatment and control groups of all four
instars; treatment groups having 2.04, 1.34, 1.25 and 1.30 times the total
lipid content of their respective control groups. [Conclusion] An LC50 dose of
deltamethrin effects both the growth and nutrient content of all instars of A. solani.