草业学报2024，Vol.33Issue(8)：181-189,9.DOI:10.11686/cyxb2023347
苜蓿生卡螨种群参数对温度的响应
Responses to temperature of population parameters of the pest mite Sancassania alfalfa fed on alfalfa
摘要
Abstract
The occurrence of subterranean pests in alfalfa (Medicago sativa) fields has become one of the major constraints of alfalfa quality and yield.Sancassania alfalfa,which was identified and described based on its morphology and molecular markers,is a newly discovered pest mite that causes serious damage to alfalfa roots.The occurrence of this pest reduced the growth,yield,and quality of alfalfa at the Jiuquan alfalfa base in Gansu Province.To date,little is known about the population biology of this pest.To explore aspects of the population biology of this pest,its growth,development,and fecundity were determined under a range of temperatures in an artificial incubator.The insects were kept in the dark and supplied with dry yeast as feed,the relative humidity (RH) was maintained at (90±5)％,and the temperature was controlled at 15,20,25,30,or 35 ℃.The results showed that the eggs did not hatch at 35 ℃,and only a few the mites survived to the larval stage at 15 ℃.In contrast,S.alfalfa successfully completed egg-to-adult development at temperatures of 20-30 ℃ .The developmental period of immature stage female mites was 19.42,16.98,and 9.91 days,and that of immature stage male mites was 18.50,16.31,and 10.16 days at 20,25,and 30 ℃,respectively.As the temperature increased,the lifespan of female and male mites became progressively shorter and differed significantly between 20 and 25 ℃ (P<0.05).The duration of each developmental period shortened as the temperature increased,and the longevity of female mites was significantly greater than that of male mites at the same temperature (P<0.05).The mean total spawning and daily spawning values were highest at 25 ℃ and differed significantly between 20 and 30 ℃ (P<0.05).The highest net reproduction rate (R0),233.3,was at 25 ℃.The mean generation time (T) was longest at 20 ℃ (26.24 days) and shortest at 30 ℃ (14.07 days).The maximum innate rate of increase (rm) was 0.329 at 30 ℃.These results provide basic data for indoor-reared S.alfalfa,and lay a foundation for devising strategies to control this important alfalfa pest mite.关键词
粉螨科/生卡螨属/苜蓿生卡螨/生长发育Key words
Acaridae/Sancassania/Sancassania alfalfa/growth and development引用本文复制引用
李伟,王涵,王常清,潘玉鑫,侯建荣,康文娟,尚素琴,师尚礼..苜蓿生卡螨种群参数对温度的响应[J].草业学报,2024,33(8):181-189,9.基金项目
兰州大学草种创新与草地农业生态系统全国重点实验室开放基金和甘肃农业大学植物保护学院农业昆虫与害虫防治重点团队建设项目(GSAU-XKJS-2023)资助. （GSAU-XKJS-2023）
