ISHS Acta Horticulturae 273: V International Workshop on Fireblight
TIMELY CUTTING OF FIRE BLIGHT INFECTIONS REDUCES LOSSES |
| Authors: | Ronald P. Covey, W. R. Fischer |
| Abstract:
Even though timely and frequent cutting is often recommended as a control measure for fire blight of pears there has been little quantitative data to support these recommendations. In 1987 fire blight was cut on three different schedules (treatments) in a block of eight year old Bartletts. A single tree randomized block design was used and each treatment was replicated 10 times. In treatment I fire blight was cut as soon as wilt was observed and weekly thereafter; treatment II was first cut 2 wks later, then 8 wks after the first cutting in this treatment the second cutting was made. All three treatments were cut in the autumn prior to leaf fall. The plant material removed in the cutting process was air dried and weighed. The average dry weight of the. plant material removed per tree was 0.54, 3.3 and 3.6 kg for treatments I, II, and III respectively. The number of points of infection in treatment III could not be determined as many of them had run together, however there was an average of 206 in treatment II and 106 in treatment I. | |
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