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KMID : 0379119940220030260
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Korean Journal of Mycology
1994 Volume.22 No. 3 p.260 ~ p.265
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Resistance of Botryosphaeria dothidea to Benomyl
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Abstract
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Since around 1980 apple rot caused by Botryosphaeria dethidea has become prevalent throughout the growing areas in Korea, doting which period chemical controls Hare been executed with no notable improvement. Results of investigations on resistance of the causal fungus to its control chemical re as followings; The susceptible fungal isolates showed no mycellal growth at 150㎍/㎖ of benomyl whereas the resistant isolates showed 7-13 mm growth at 300㎍/㎖ and 6-8 mm at 2,400㎍/㎖ of this fungicide. At the latter high concentration, spore gremmination of the resistant isolates was 5-9% while that of the susceptible isolates was 0%. Within the image of 20-2,400㎍/㎖ testee, the susceptible iosolates were unable to form pycnidia, but the resistant isolates formed abundant pycnidia at the lower concentration with decreasing pycnidia along with the higher concentration.
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