Comparative in vitro sensitivity of selected pesticides on Phytophthora palmivora from cocoa Theobroma cacao and durian Durio zibethinus

Chan L.G., . and Lim T.K., . Comparative in vitro sensitivity of selected pesticides on Phytophthora palmivora from cocoa Theobroma cacao and durian Durio zibethinus. pp. 183-191. ISSN 0126-6128

Five new systemic compounds viz. metalaxyl benalayxl cyprofuran propamocarb and fosetyl Al and two standard protectants etridiazole and captafol were compared for in vitro effects on representative isolates of Phytophthora palmivora from cocoa and durian. Metalaxyl etridiazole and cyprofuram were highly inhibitory to mycelial growth sporangium and chlamydospore production direct sporangium germination and germ-tube development of both cocoa and durian isolates while benalazyl was moderately inhibitory. Etridiazole and benalaxyl were more suppressive on zoospore germination but metalaxyl and cyprofuram were relatively ineffective. Captafol was also highly suppressive to mycelial growth direct sporangium and zoospore germination but less so on sporangium and chlamydospore production. Propamocarb and fosetyl Al were comparatively the least effective against all the developmental stages of the isolates except in the case of zoospore germination of the durian isolate where the latter was highly inhibitory

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Abstract

Five new systemic compounds viz. metalaxyl benalayxl cyprofuran propamocarb and fosetyl Al and two standard protectants etridiazole and captafol were compared for in vitro effects on representative isolates of Phytophthora palmivora from cocoa and durian. Metalaxyl etridiazole and cyprofuram were highly inhibitory to mycelial growth sporangium and chlamydospore production direct sporangium germination and germ-tube development of both cocoa and durian isolates while benalazyl was moderately inhibitory. Etridiazole and benalaxyl were more suppressive on zoospore germination but metalaxyl and cyprofuram were relatively ineffective. Captafol was also highly suppressive to mycelial growth direct sporangium and zoospore germination but less so on sporangium and chlamydospore production. Propamocarb and fosetyl Al were comparatively the least effective against all the developmental stages of the isolates except in the case of zoospore germination of the durian isolate where the latter was highly inhibitory

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Item Type:	Article
Additional Information:	6 tables; 23 ref. Summary (En Malay)
AGROVOC Term:	THEOBROMA CACAO
AGROVOC Term:	DURIO ZIBETHINUS
AGROVOC Term:	PHYTOPHTHORA
AGROVOC Term:	FUNGICIDAS/ ESPORAS
AGROVOC Term:	GERMINACION
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:54
URI:	http://webagris.upm.edu.my/id/eprint/18937

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