In order to understand the occurrence and development of Semanotus bifasciatus (Motschulsky), a borer insect of Platycladus orientalis in parts of northern and eastern China and to improve its prediction, the develo...In order to understand the occurrence and development of Semanotus bifasciatus (Motschulsky), a borer insect of Platycladus orientalis in parts of northern and eastern China and to improve its prediction, the developmental threshold temperature (C1) and effective accumulated temperature (K) of S. bifasciatus were determined under conditions of constant and variable temperatures. The results show that under constant temperatures the value of C1 has a range of 8.90±1.77℃and the value of K lies between 95.19±13.14 degree-day for eggs; the values for larvae are C1= 13.26±3.06℃ and the number of degree-day is K 2,885.07±187.87 degree-day; for pupae the ranges are C1 = 8.93±2.49℃ and K= 131.20±25.63 degree-day. Under the condition of ambient temperatures, the values for eggs are C1= 17.33±1.24℃ and K= 70.79±8.99 degree-day. It is suggested that S. bifasciatus adults over-winter in a state of dormancy, not at a diapause. Warm winter may accelerate the life cycle ofS. bifasciatus. Equations can be used to predict an early occurrence ofS. bifasciatus.展开更多
[ Objective] The paper was to study the relationship between temperature and development of Potosia brevitarsis Lewis. [ Methods] Six constant tem- peratures (21, 24, 27, 30, 33 and 36 ℃ ) were set in the laborator...[ Objective] The paper was to study the relationship between temperature and development of Potosia brevitarsis Lewis. [ Methods] Six constant tem- peratures (21, 24, 27, 30, 33 and 36 ℃ ) were set in the laboratory to study developmental threshold temperature and effective accumulated temperature of P. brevitarsis. [ Result] The developmental durations of various states of P. brevitarsis were shortened with the increasing temperature ranged from 21 ℃ to 36 ℃ ; the developmental rates were accelerated with the increasing temperature. The developmental threshold temperatures of egg, larva, pupa and pre-ovipesition of adult were estimated to be 12.79, 9.15, 14.86 and 13.80 ℃, respectively; the effective accumulated temperature were 136.25, 3 031.31,308.92 and 98.35 d · ℃, respectively. The developmental threshold temperature and effective amcumulated temperature for one complete generation were 9.96 ℃ and 3 628.73 d · ℃, re- spectively. Combined with meteorological data, the theoretical generation number of P. brevitarsis occurred in Shihezi was presumed to be one per year, which was basically coincided with actual occurrence generations in fields. [ Conclusion] The paper provided theoretical basis for effective control against P. brevitarsis.展开更多
为预测及综合防治豆科植物的害虫长额负蝗(Atractomorpha lata Motschoulsky),研究温度对长额负蝗生长发育、存活和繁殖的影响,在室内人工气候箱16、20、24、28和32℃共5个恒温条件下,以大豆豆叶为寄主进行饲养,研究温度对长额负蝗的各...为预测及综合防治豆科植物的害虫长额负蝗(Atractomorpha lata Motschoulsky),研究温度对长额负蝗生长发育、存活和繁殖的影响,在室内人工气候箱16、20、24、28和32℃共5个恒温条件下,以大豆豆叶为寄主进行饲养,研究温度对长额负蝗的各虫态发育历期、发育速率及存活率的影响。结果表明:在16℃条件下长额负蝗无法完成世代发育。在试验温度范围内,卵、若虫和全世代平均发育历期随温度升高而缩短,成虫寿命为先升高再降低,通过拟合方程得出发育速率与温度呈正相关。采用直线回归法计算出长额负蝗卵期、若虫期、成虫期和全世代发育起点温度分别为10.81、14.50、18.98、15.17℃,有效积温分别为464.91、453.43、148.41和1078.41 d·℃。长额负蝗成虫产卵量在24℃时最高,为80.37粒/雌,20℃最低,为26.47粒/雌,在20~32℃条件下,种群趋势指数I均大于1,24℃时I值最大,为11.31。温度对长额负蝗存活率影响显著。研究结果可为长额负蝗发生期预测及综合防治提供理论依据。展开更多
文摘In order to understand the occurrence and development of Semanotus bifasciatus (Motschulsky), a borer insect of Platycladus orientalis in parts of northern and eastern China and to improve its prediction, the developmental threshold temperature (C1) and effective accumulated temperature (K) of S. bifasciatus were determined under conditions of constant and variable temperatures. The results show that under constant temperatures the value of C1 has a range of 8.90±1.77℃and the value of K lies between 95.19±13.14 degree-day for eggs; the values for larvae are C1= 13.26±3.06℃ and the number of degree-day is K 2,885.07±187.87 degree-day; for pupae the ranges are C1 = 8.93±2.49℃ and K= 131.20±25.63 degree-day. Under the condition of ambient temperatures, the values for eggs are C1= 17.33±1.24℃ and K= 70.79±8.99 degree-day. It is suggested that S. bifasciatus adults over-winter in a state of dormancy, not at a diapause. Warm winter may accelerate the life cycle ofS. bifasciatus. Equations can be used to predict an early occurrence ofS. bifasciatus.
基金Supported by National Natural Science Foundation of China(31360452)&National Natural Science Foundation of China(41161068)Guide Project of Xinjiang Academy of Agricultural and Reclamation Science(YYD2009-3)
文摘[ Objective] The paper was to study the relationship between temperature and development of Potosia brevitarsis Lewis. [ Methods] Six constant tem- peratures (21, 24, 27, 30, 33 and 36 ℃ ) were set in the laboratory to study developmental threshold temperature and effective accumulated temperature of P. brevitarsis. [ Result] The developmental durations of various states of P. brevitarsis were shortened with the increasing temperature ranged from 21 ℃ to 36 ℃ ; the developmental rates were accelerated with the increasing temperature. The developmental threshold temperatures of egg, larva, pupa and pre-ovipesition of adult were estimated to be 12.79, 9.15, 14.86 and 13.80 ℃, respectively; the effective accumulated temperature were 136.25, 3 031.31,308.92 and 98.35 d · ℃, respectively. The developmental threshold temperature and effective amcumulated temperature for one complete generation were 9.96 ℃ and 3 628.73 d · ℃, re- spectively. Combined with meteorological data, the theoretical generation number of P. brevitarsis occurred in Shihezi was presumed to be one per year, which was basically coincided with actual occurrence generations in fields. [ Conclusion] The paper provided theoretical basis for effective control against P. brevitarsis.
文摘为预测及综合防治豆科植物的害虫长额负蝗(Atractomorpha lata Motschoulsky),研究温度对长额负蝗生长发育、存活和繁殖的影响,在室内人工气候箱16、20、24、28和32℃共5个恒温条件下,以大豆豆叶为寄主进行饲养,研究温度对长额负蝗的各虫态发育历期、发育速率及存活率的影响。结果表明:在16℃条件下长额负蝗无法完成世代发育。在试验温度范围内,卵、若虫和全世代平均发育历期随温度升高而缩短,成虫寿命为先升高再降低,通过拟合方程得出发育速率与温度呈正相关。采用直线回归法计算出长额负蝗卵期、若虫期、成虫期和全世代发育起点温度分别为10.81、14.50、18.98、15.17℃,有效积温分别为464.91、453.43、148.41和1078.41 d·℃。长额负蝗成虫产卵量在24℃时最高,为80.37粒/雌,20℃最低,为26.47粒/雌,在20~32℃条件下,种群趋势指数I均大于1,24℃时I值最大,为11.31。温度对长额负蝗存活率影响显著。研究结果可为长额负蝗发生期预测及综合防治提供理论依据。