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EVALUATION OF APPLICATION TECHNIQUES OF FOUR FUNGICIDES FOR THE CONTROL OF PHYTOPHTHORA ROOT ROT ON AVOCADO SEEDLINGS

Cp Snyman, Jm Kotzé

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Abstract

SUMMARY Metalaxyl, Fosetyl-AI, Etridiazole and an experimental fungicide (D4562 and D4598),were tested as soil drench, foliar spray, stem paint or sponge band applications for efficacy against Phytophthora root rot on avocado seedlings. Etridiazole and Metalaxyl as soil drench and Metalaxyl and Fosetyl—AI as stem paint treatments controlled root rot of seedlings inoculated with P. cinnamomi-C (not previously exposed to Metalaxyl). Metalaxyl soil drench did not control root rot of seedlings inoculated with P. cinnamomi-R (previously exposed to Metalaxyl soil drench treatments for five years). Other effective treatments still significantly controlled root rot of seedlings inoculated with P. cinnamomi-R.

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What this paper is about

SUMMARY Metalaxyl, Fosetyl-AI, Etridiazole and an experimental fungicide (D4562 and D4598),were tested as soil drench, foliar spray, stem paint or sponge band applications for efficacy against Phytophthora root rot on avocado seedlings. Etridiazole and Metalaxyl as soil drench and Metalaxyl and Fosetyl—AI as stem paint treatments controlled root rot of seedlings inoculated with P. cinnamomi-C (not previously exposed to Metalaxyl). Metalaxyl soil drench did not control root rot of seedlings inoculated with P. cinnamomi-R (previously exposed to Metalaxyl soil drench treatments for five years). Other effective treatments still significantly controlled root rot of seedlings inoculated with P. cinnamomi-R.

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Available abstract

SUMMARY Metalaxyl, Fosetyl-AI, Etridiazole and an experimental fungicide (D4562 and D4598),were tested as soil drench, foliar spray, stem paint or sponge band applications for efficacy against Phytophthora root rot on avocado seedlings. Etridiazole and Metalaxyl as soil drench and Metalaxyl and Fosetyl—AI as stem paint treatments controlled root rot of seedlings inoculated with P. cinnamomi-C (not previously exposed to Metalaxyl). Metalaxyl soil drench did not control root rot of seedlings inoculated with P. cinnamomi-R (previously exposed to Metalaxyl soil drench treatments for five years). Other effective treatments still significantly controlled root rot of seedlings inoculated with P. cinnamomi-R.

Key concepts: Metalaxyl, Fungicide, Root rot, Phytophthora cinnamomi, Biology, Inoculation, Phytophthora, Horticulture

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EVALUATION OF APPLICATION TECHNIQUES OF FOUR FUNGICIDES FOR THE CONTROL OF PHYTOPHTHORA ROOT ROT ON AVOCADO SEEDLINGS — Research Paper | ScholarLens