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Suppression of Fusarium wilt of spinach with hypovirulent binucleate Rhizoctonia
被引：7
作者：
A. Muslim
Hayato Horinouchi
Mitsuro Hyakumachi
机构：
[1] United Graduate School of Agricultural Science,
[2] Gifu University,undefined
[3] Gifu,undefined
[4] Japan,undefined
[5] Gifu Prefectural Research Institute for Agricultural Sciences,undefined
[6] Gifu,undefined
[7] Japan,undefined
[8] Laboratory of Plant Disease Science,undefined
[9] Faculty of Agriculture,undefined
[10] Gifu University,undefined
[11] 1-1 Yanagido,undefined
[12] Gifu 501-1193,undefined
[13] Japan,undefined
关键词：
Key words Fusarium oxysporum f. sp. spinaciae;
Hypovirulent binucleate Rhizoctonia;
Biocontrol;
Spinach;
D O I：
10.1007/s10327-002-0024-9
中图分类号：
学科分类号：
摘要：
Four isolates of hypovirulent binucleate Rhizoctonia (HBNR) were evaluated for their ability to control Fusarium wilt of spinach (FWS) caused by Fusarium oxysporum f. sp. spinaciae (FOS). Fourteen-day-old spinach seedlings grown in paper pots with HBNR-amended soil (1% w/w ground barley grain inoculum) were transferred to artificially pathogen-infested soil. Treatments with HBNR isolates significantly (P = 0.05) reduced disease and discoloration severity by 56%–100% and 52%–100%, respectively. The numbers of colony-forming units of FOS per gram fresh weight in petioles or roots were reduced significantly (P = 0.01) in the plants treated with HBNR. HBNR isolates were well reisolated from the roots inside paper pots where they were inoculated, whereas inconsistent colonization of HBNR was recorded from the roots outside paper pots where only pathogen was inoculated. Root extracts from HBNR-treated and pathogen-challenged plants significantly inhibited germination and germling length of FOS. The fresh weight of spinach leaves in the HBNR-treated plants increased significantly (P = 0.01), as much as 53%–63%, over the untreated and pathogen-challenged plants. This is the first report of biocontrol of FWS by HBNR.
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页码：143 / 150
页数：7
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