ISHS Acta Horticulturae 596: VIII International Symposium on Pear
THE USE OF CLIMATIC DATA FOR INTEGRATED MANAGEMENT OF PEARS: FORECASTING FIRE BLIGHT |
| Authors: | S.M. Abol-Maatey, M.A. Medany, A.F. Abou-Hadid, N.Y. Abd El-Ghafar, I.S. Elewa |
| Keywords: | IPM, fire blight, pear, models |
| Abstract:
The MARYBLYTTM computer model version 4.3 was applied to forecasting fire blight in 1998-2000 in order to explain the epidemic nature of severe outbreaks of this disease. Blossom blight symptoms (BBS) were observed when average daily temperatures were greater than 20°C, and shoot blight symptoms (SBS) developed 1-3 days after BBS. Canker blight symptoms (CBS) were observed season long, and were most active from 20 March until 15 May. Epiphytic inoculum potential (EIP) played a major role in disease incidence. The disease was more severe during 1998 and 1999 because blossom infection developed early, and moderate in 2000 due to later development of the disease. The number of applications of streptomycin sulfate was reduced to 6 sprays through the growing season by use of the MARYBLYT model, compared with 12 sprays, typical under Egyptian conditions. This is the first study applying the MARYBLYT model for predicting pear fire blight in Egypt. | |
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