Effect of Wetness Duration and Temperature on Infection of Geranium byBotrytis cinerea

摘要: Duration and temperature of postinoculation wetness periods were investigated in relation to infection flowers leaves geranium by Botrytis cinerea. Infection was assessed indirectly estimating sporulation incidence the pathogen inoculated tissues. Sporulation whole with conidia increased sharply when duration at 15, 21, 25, 30 degrees C from 8 24 h, 4 12 6 respectively. The did not sporulate after shorter these temperatures or h 5 10 C. No observed sepals, petals, stamens wet period 25 less than equal pistils pedicels lasted but 100, 73, 60% respective organs as 24, 12, h. Following conidial inoculations foliage, B. cinerea sporulated 1-week-old only greater 6, 4, respectively, 10-week-old 8, 28 4-week-old grater C, any age group 0 more frequently 1- for infected efficiently applied petals that positioned on leaves, directly leaves. Logistic regression models developed adequately described effects and, inference. incidence,