Life Table Construction under Different Temperatures and Insecticide Susceptibility Analysis of Uroleucon formosanum (Hemiptera: Aphididae)

Uroleucon formosanum is an important aphid pest of lettuce, but basic information on its biology is scarce. In this study, effects of three constant temperatures (17, 21, and 25 °C, simulating the mean temperature range in greenhouses) on the development and fecundity of U. formosanum were analyzed...

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Bibliographic Details
Published in:Insects (Basel, Switzerland) Switzerland), 2022-08, Vol.13 (8), p.693
Main Authors: Jing, Tian-Xing, Qi, Chu-Chu, Jiao, Ao, Liu, Xiao-Qiang, Zhang, Shuai, Su, Hong-Hua, Yang, Yi-Zhong
Format: Article
Language:English
Subjects:
Abamectin
Age
Bioassays
Chlorpyrifos
Cypermethrin
Fecundity
Fungicides
Greenhouses
Imidacloprid
insecticide bioassay
Insecticides
Insects
Lettuce
Life expectancy
life table
Pest control
Pesticides
Pests
Population control
Survival
Tables (data)
Thiamethoxam
Toxicity
Uroleucon
Uroleucon formosanum
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Summary:Uroleucon formosanum is an important aphid pest of lettuce, but basic information on its biology is scarce. In this study, effects of three constant temperatures (17, 21, and 25 °C, simulating the mean temperature range in greenhouses) on the development and fecundity of U. formosanum were analyzed by constructing a life table. U. formosanum could develop and reproduce under all three temperatures, but the survival rate, development, and fecundity of U. formosanum were affected by temperature. The intrinsic rate of increase was lowest at 17 °C (0.17) and it was significantly less than at 21 °C (0.20) and 25 °C (0.23). Furthermore, U. formosanum had the lowest finite rate of increase (1.19) and the largest mean generation time (20.21) at 17 °C. These results mean that U. formosanum is less adapted to the lower temperatures (17 °C) among these three set temperatures. To screen insecticides for control, susceptibility of U. formosanum to six insecticides including chlorpyrifos, abamectin, beta-cypermethrin, imidacloprid, nitenpyram, and thiamethoxam was evaluated. U. formosanum was relatively sensitive to all six test insecticides. Chlorpyrifos had the highest toxicity to U. formosanum (LC50 = 3.08 mg/L). These data may help to develop integrated management strategies for better population control of U. formosanum.
ISSN:2075-4450
2075-4450
DOI:10.3390/insects13080693