Ferti-lome Fire Blight Spray is a streptomycin product for home orchards. If suitable spray equipment is available, applications of a product containing the antibiotic streptomycin sulfate can be made to pear and apple trees during bloom, to protect flowers from infection. Continue to monitor the tree during the growing season to see if more blighted shoots appear.ĭuring the dormant season, before new growth begins, cut out any remaining blighted shoots and cankers. Avoid overfertilizing.īlighted shoots can be pruned out during the growing season, with cuts made 8 to 12 inches below where symptoms are seen. However, resistant does not mean immune, and in years when conditions are favorable, disease may still occur.īecause the bacteria can infect through young shoots, trees that produce a lot of new growth – such as those that have been pruned severely during the winter or received a great deal of fertilizer – are more likely to have more shoot infections. Some mayhaw varieties are more fire blight resistant than others, as well. Pear and apple varieties recommended for Louisiana have some resistance. One of the first lines of defense against fire blight is planting varieties that are resistant to the disease. Dead shoot terminals often have a “shepherd’s crook” appearance.īecause bacteria can move from place to place on a tree in water, fire blight is more likely to be a problem during rainy years like this one. Bacteria can also infect leaves at the tips of young shoots. They can then move into wood below those flowers. The bacteria spread from around cankers (dead areas on branches or trunks) to open flowers during bloom, via insects or in water. Fire blight is a common problem of pears and apples and is sometimes seen on mayhaws, loquats, and other plants in the rose family, too.įire blight is a bacterial disease. Some people have observed the tips of branches on their pear trees dying.
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