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首页> 外文期刊>Tropical Science >Nematode threats to intensifying smallholder upland rice production in the Guinea Savannah of Cote d'Ivoire.
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Nematode threats to intensifying smallholder upland rice production in the Guinea Savannah of Cote d'Ivoire.

机译：线虫威胁着在科特迪瓦的几内亚大草原上加强小农旱稻生产。

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摘要

In the Guinea savannah of West Africa, upland rice production is rapidly becoming more intensified. The pest potential of many nematodes is regularly underestimated and their damage often misdiagnosed. To establish the relationship between intensification and nematode communities, surveys were undertaken in 1995-97 in 136 upland rice fields in north west Cote d'Ivoire. Population densities of Pratylenchus and criconematids and total nematode communities increased with rice intensification. Grain yields were negatively correlated with the population densities of criconematids and the total nematode community. Population densities of the genera Pratylenchus, Helicotylenchus and Scutellonema were correlated negatively with yields in either one of thetwo seasons studied. The 1000 grain weights were negatively correlated with population densities of Pratylenchus, criconematids, Helicotylenchus and total nematode community in 1996 but not 1997. Scutellonema correlated positively with grain size in 1997 but not 1996. Thus, nematodes are important pest elements in these rapidly changing production systems, and nematode suppressive cropping patterns need to be sought.
机译：在西非的几内亚大草原上，陆地稻的生产正在迅速增强。通常会低估许多线虫的有害生物潜能，并且经常会误诊其危害。为了建立集约化线虫群落与线虫群落之间的关系，1995-97年对科特迪瓦西北部的136个旱稻田进行了调查。稻米集约化后，小菜蛾和cr线虫的种群密度以及整个线虫群落增加。谷物产量与with线虫的种群密度和总线虫群落呈负相关。在所研究的两个季节中的任何一个季节中，Pratylenchus，Helicotylenchus和Scutellonema属的种群密度与产量负相关。在1996年而不是1997年，这1000种谷物的重量与拟南芥，cr线虫，螺旋线虫和总线虫种群的密度呈负相关。在1997年，黄皮虫与谷物的大小呈正相关，但与1996年却无正相关。因此，线虫是这些快速变化的生产中的重要害虫元素系统和线虫抑制性种植模式需要寻找。

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