Articles
CAN SPORE TRAPPING BE OF HELP IN BLACK CURRANT MILDEW CONTROL?
Article number
505_44
Pages
333 – 336
Language
Abstract
In the UK growers control black currant mildew, caused by Sphaerotheca mors-uvae, by routine spray programmes starting in early to mid-May.
A study was undertaken to monitor ascospore release from overwintering cleistocarps and to relate this to the first sign of leaf infection.
Sticky rod spore traps were monitored from mid-March to mid-May, but ascospore release had started even earlier in the season and continued until late May.
At the two sites monitored leaf infection did not occur until temperatures reached 18°C, despite peak of spore catches when temperatures were lower.
It appeared that spore trapping would not be useful in helping growers decide when to start their preventative fungicide programme.
A study was undertaken to monitor ascospore release from overwintering cleistocarps and to relate this to the first sign of leaf infection.
Sticky rod spore traps were monitored from mid-March to mid-May, but ascospore release had started even earlier in the season and continued until late May.
At the two sites monitored leaf infection did not occur until temperatures reached 18°C, despite peak of spore catches when temperatures were lower.
It appeared that spore trapping would not be useful in helping growers decide when to start their preventative fungicide programme.
Publication
Authors
T. Locke, I. Koomen
Keywords
Black currant, Sphaerotheca mors-uvae, mildew, spore-trapping
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