Rice root nematodes, Hirschmanniella spp. parasitize in the roots of rice and water plantspread widely. Ten species of the genus Hirschmanniella Luc et Goody, 1964 (Nemata:Pratylenchidae) collected from the root of ri...Rice root nematodes, Hirschmanniella spp. parasitize in the roots of rice and water plantspread widely. Ten species of the genus Hirschmanniella Luc et Goody, 1964 (Nemata:Pratylenchidae) collected from the root of rice in Yunnan Province are reported. They areH. belli, H. caudacrena, H. diversa, H. gracilis, H. imamuri, H. mexicana, H. microtyla,H. mucronata, H. oryzae and H. spinicaudata, including seven species of importantpathogenic nematodes of rice and two dominant species H. oryzae and H. imamari. Generally,the trend of species composition pattern is H. oryzae and H. imamari, which is a commoncomposition pattern in the world, but the species composition mode varies with thedifference of altitude and latitude. Their distribution relates to altitude and latitudeclosely, and also to the type of rice, such as indica or japonica rice.展开更多
[Objective] The nematicidal activity of plant extracts was investigated. We aimed to explore a kind of botanical pesticide to control Hirschmanniella spp. [Method] The Chuanxiong （root）, agrimony （whole plant）, co...[Objective] The nematicidal activity of plant extracts was investigated. We aimed to explore a kind of botanical pesticide to control Hirschmanniella spp. [Method] The Chuanxiong （root）, agrimony （whole plant）, cocklebur （grain）, basil （leaves）, ragweed （stems and leaves）, green onion （root）, garlic （tuber）, Yuzhu （leaves）, marshpeper smartweed （whole plant）, horseweed （aboveground stems and leaves） were dried, grinded and sieved. The powders were then extracted by ethanol at room temperature for 24 h. The extract solutions were filtered through fil- ter pater. The obtained plant extracts were then diluted to determine their nematici- dal activities. [Result] The Chuanxiong extract had the highest nematicidal activity, followed by cocklebur extract, agrimony extract, basil extract, garlic extract, ragweed extract. The horseweed extract had the lowest nematicidal activity. [Conclusion] The Chuanxiong and other plants were natural, and they had a good environmental compatibility. They could be developed as botanical pesticides against Hirschman- niella spp.展开更多
Hirschmanniella oryzae is one of the most im-portant pathogenic nematodes of rice. Thereare few data on the Integrated Pest Manage-ment (IPM) of H. oryzae except for somestudies on the chemical control of this nema-t... Hirschmanniella oryzae is one of the most im-portant pathogenic nematodes of rice. Thereare few data on the Integrated Pest Manage-ment (IPM) of H. oryzae except for somestudies on the chemical control of this nema-tode. A study on the IPM of H. oryzae wascarried out in Guangzhou from 1991 to 1995.展开更多
基金supported by the Yunnan Natural Science Foundation(98C005Q),P.R.China
文摘Rice root nematodes, Hirschmanniella spp. parasitize in the roots of rice and water plantspread widely. Ten species of the genus Hirschmanniella Luc et Goody, 1964 (Nemata:Pratylenchidae) collected from the root of rice in Yunnan Province are reported. They areH. belli, H. caudacrena, H. diversa, H. gracilis, H. imamuri, H. mexicana, H. microtyla,H. mucronata, H. oryzae and H. spinicaudata, including seven species of importantpathogenic nematodes of rice and two dominant species H. oryzae and H. imamari. Generally,the trend of species composition pattern is H. oryzae and H. imamari, which is a commoncomposition pattern in the world, but the species composition mode varies with thedifference of altitude and latitude. Their distribution relates to altitude and latitudeclosely, and also to the type of rice, such as indica or japonica rice.
基金Supported by Science and Technology Project of Hunan Provincial Department of Education(11A059)Earmarked Fund for China Agriculture Research System(CARS19-05B)~~
文摘[Objective] The nematicidal activity of plant extracts was investigated. We aimed to explore a kind of botanical pesticide to control Hirschmanniella spp. [Method] The Chuanxiong （root）, agrimony （whole plant）, cocklebur （grain）, basil （leaves）, ragweed （stems and leaves）, green onion （root）, garlic （tuber）, Yuzhu （leaves）, marshpeper smartweed （whole plant）, horseweed （aboveground stems and leaves） were dried, grinded and sieved. The powders were then extracted by ethanol at room temperature for 24 h. The extract solutions were filtered through fil- ter pater. The obtained plant extracts were then diluted to determine their nematici- dal activities. [Result] The Chuanxiong extract had the highest nematicidal activity, followed by cocklebur extract, agrimony extract, basil extract, garlic extract, ragweed extract. The horseweed extract had the lowest nematicidal activity. [Conclusion] The Chuanxiong and other plants were natural, and they had a good environmental compatibility. They could be developed as botanical pesticides against Hirschman- niella spp.
文摘 Hirschmanniella oryzae is one of the most im-portant pathogenic nematodes of rice. Thereare few data on the Integrated Pest Manage-ment (IPM) of H. oryzae except for somestudies on the chemical control of this nema-tode. A study on the IPM of H. oryzae wascarried out in Guangzhou from 1991 to 1995.
