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The infection of apples by Phytophthora syringae
Author(s) -
EDNEY K. L.
Publication year - 1978
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1978.tb00675.x
Subject(s) - biology , captan , zoospore , inoculation , horticulture , botany , phycomycetes , phytophthora , agronomy , fungicide , spore
SUMMARY Contamination with infected soil has led to high wastage of apples in storage due to rotting by Phytophthora syringae. At 3‐3 o C lesions formed 3–4 wk after inoculation with zoospores; the percentage infection fell if the suspensions dried after 48 h at this temperature and after 22 h at 15 o C. Infected soil rotted fruit only if kept moist; at 3‐3 o C a 3‐day period of wetness resulted in 37‐5% rotting after 8 wk. Fruit dipped in soil slurry remained wet in some parts of a 4361(12 bushel) bin for at least 3 wk. There was a 10‐fold increase in rotting by contact between sound and rotting fruit after 11 wk at 3‐3 o C. Captan gave effective protection against rotting derived from zoospores or infected soil; it had no eradicant action.