STUDIES ON THE SOURCES OF RHIZOCTONIA SOLANI FOR PRIMARY INFECTION

Chin-Chyu Tu; 杜金池

STUDIES ON THE SOURCES OF RHIZOCTONIA SOLANI FOR PRIMARY INFECTION

Other Title

鐘麻腰折病病原菌(Rhizoctonja solani)初次侵染源之研究

Journal

植物保護學會會刊

Journal Volume

11

Journal Issue

3

Pages

101-108

ISBN

0577-750X

Date Issued

1969-09

Date

1969

Author(s)

Chin-Chyu Tu

杜金池

URI

https://scholars.tari.gov.tw/handle/123456789/4712

Abstract

Hyphae of Rhizoctonia solani showed stronger pathogenicity than scierotia on kenaf seeds and seedlings. The saprophytic activity of R. solanI in the soil was most prominent at the soil surface to a depth of 30 cm. Approximately 19.0-3.696 of the organic debris obtained at this depth carried incculum of R. solanl. The loofah root harbcred less R. solani than that of 8 other previcus crops in kenaf field. Isciates of R. solanl differed in their ability to form scierotia. Of the three isolates tested, K-1 and K-2 produced a slightly greater number of scierotia in natural soil than sterilized soil, while the isolate S-1 formed n-tore sclerctia , in natural soil inccrpcrated with sterilized soil. Therefore, the ability of scierotia fcrmaticn of R. solani seemed to be greatly depended upon the substrates as well as the isolates ccncerned. 土壤內Rhizoctonla solani之腐生菌絲及菌核均為該病原菌之初次侵染源。惟兩者對鐘麻種子及幼苗之致病力菌絲較菌核強。R. solani在土壞內之腐生活動大部份均集中在自土面以下30公分聞的有機殘體上。在臺灣南部地區9種不同前作物之10處鐘麻田調查結果，此一深度範圍內之有機殘體平均19.0-53.6%帶有R. solani，前作物絲瓜的鐘麻田含有R. solani之有機殘體則顯著減內產少。R. solani產生菌核的能力因菌株而異。供試三菌株中之二菌株（K--1及K-2）在未消毒土壤生菌核數較消毒土壤內多，另一供試菌株（S-1）則在消毒土壤與未消毒土壤各一半均勻混合之土壤內最適合產生菌核。因此，判斷R. solani之菌核產生能力應同時考慮供應產生菌核之基質（土壤）種類及菌株類別。

Publisher

植病保護學會

Type

journal article

File(s)

Name

11-3-101-108.pdf

Size

7.77 MB

Format

Adobe PDF

Checksum

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