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首页> 外文期刊>Indian Journal of Entomology >POPULATION DYNAMICS OF STETHORUS PAUPERCULUS WEISE (COLEOPTERA: COCCINELLIDAE)
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POPULATION DYNAMICS OF STETHORUS PAUPERCULUS WEISE (COLEOPTERA: COCCINELLIDAE)

机译：紫茎泽兰种群的动态变化（鞘翅目：球虫）

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摘要

The population dynamics of Stethoruspauperculus Weise was studied on sorghum and baru grass under field conditions from 36th standard meteorological week (SMW) of 2012 to 35"1 standard meteorological week of 2013. These revealed that this mite predator has two population peaks i.e. first during 40th SMW (5,h to 10,h October 2012) with 4.20 predators per plant and the second during 17,h SMW with 2.73 predators per plant (26th April to 2nd March 2013) on sorghum. It was also observed that during thesepeaks the population of prey (Oligonychus indicus Hirst) was also highest. The correlation studies with abiotic factors suggested that there were a significant positive correlation existed between predator S. pauperculus with the prey mite (O. indicus) (r = 0.964). With the predator maximum, minimum and average temperature had positive correlations whereas morning, evening and average relative humidity had a negative correlations which are statistically significant. The rainfall had negative significantcorrelation (r = -0.283) with the predator in sorghum. The observations on the Baru grass, a very common weed in sorghum as well as found on bunds is an alternative host of O. indicus indicated that the predator remained active throughout the year and it showed two peaks. The first peak was recorded during 43rd SMW (last week of October 2012) (3.33 predators/plant), while the second peak was observed during 17,h SMW (last week of April 2013) (4.67 predators/plant). The prey mite,0. indicus was also higher during the period. The correlations between predator and its prey worked out revealed that a positive correlation (r = 0.974). There was a positive significant correlation between predator and maximum, minimum and average temperature (r = 0.615,0.498and 0.703) whereas a non-significant positive correlation existed between morning, evening and average relative humidity. A negative correlation existed between predator population and rainfall (r = -0.156).
机译：从2012年第36个标准气象周（SMW）到2013年35” 1个标准气象周，对高粱和巴鲁草在高粱和巴鲁草上的种群动态进行了田间条件研究。这些结果表明，这种螨虫捕食者有两个种群高峰，即第40个高峰SMW（2012年10月5日至10月10日），每棵植物有4.20捕食者，高粱中，第二天是17，h SMW，每具植物有2.73捕食者（2013年4月26日至3月2日）。猎物（Oligonychus indicus Hirst）的数量也最高，与非生物因子的相关性研究表明，食肉小pa与食螨（O. indicus）之间存在显着的正相关（r = 0.964）。 ，最低和平均温度呈正相关，而早，晚和平均相对湿度呈负相关，具有统计学意义。与高粱中的捕食者显着相关（r = -0.283）。对Baru草（高粱中非常常见的杂草以及在外滩上发现的）的观察结果表明，O。indicus是另一种寄主，表明掠食者全年都保持活跃，并显示出两个高峰。在第43个SMW（2012年10月的最后一个星期）（3.33捕食者/植物）期间记录了第一个高峰，而在第17 h SMW（2013年4月的最后一个星期）（4.67个捕食者/植物）上观察到了第二个高峰。猎物螨，0。在此期间，指标也较高。捕食者与其猎物之间的相关性显示出正相关（r = 0.974）。捕食者与最高，最低和平均温度之间存在正显着正相关（r = 0.615、0.498和0.703），而早，晚和平均相对湿度之间则没有显着正相关。捕食者数量与降雨量之间存在负相关（r = -0.156）。

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