Comparative Invitro Sensitivity of Selected Chemicals on Phytophthora palmivora from Cocoa and Durian
Five new systemic compounds vzi. metalaxyl, benalayxl, cyprofuran, propamocarb and fosetyl A I and two standard protectants, etridiazole and captafol were compared for invitro effects on representative isolates of Phytophthora palmivora from cocoa and durian. MetalaxyI, etridiazole and cyprofuram...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English English |
| Published: |
1986
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| Online Access: | http://psasir.upm.edu.my/id/eprint/2358/1/Comparative_Invitro_Sensitivity_of_Selected_Chemicals_on.pdf http://psasir.upm.edu.my/id/eprint/2358/ |
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| Institution: | Universiti Putra Malaysia |
| Language: | English English |
| Summary: | Five new systemic compounds vzi. metalaxyl, benalayxl, cyprofuran, propamocarb and fosetyl
A I and two standard protectants, etridiazole and captafol were compared for invitro effects on representative
isolates of Phytophthora palmivora from cocoa and durian. MetalaxyI, etridiazole and
cyprofuram were highly inhibitory to mycelial growth, sporangium and chlamydospore product£on,
direct sporangium germination and germ-tube development of both cocoa and durian isolates while
benalaxyl was moderately inhibitory. Etridiazole and benalaxyl were more suppressive 9n zoospore
germination but metalaxyl and cyprofuram were relatively ineffective. Captafol was also highly suppressive
to mycelz'al 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 zsolates except in the case of zoospore germination of the
durian isolate where the latter was highly inhibitory. |
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