ISHS Acta Horticulturae 505: VII International Symposium on Rubus and Ribes
CAN SPORE TRAPPING BE OF HELP IN BLACK CURRANT MILDEW CONTROL? |
| Authors: | T. Locke, I. Koomen |
| Keywords: | Black currant, Sphaerotheca mors-uvae, mildew, spore-trapping |
| 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. | |
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