Articles
SURVIVAL OF AN INTRODUCED STRAIN AND NATURAL POPULATIONS OF ERWINIA HERBICOLA ON APPLE
Article number
217_43
Pages
245 – 252
Language
Abstract
Erwinia herbicola strain Eh112Y was sprayed on leaves of ‘Idared’ apple, and the populations recoverable at subsequent times was determined by plating.
During the first 24 hr after application, marked decreases in the recoverable populations were observed in all trials done on 10 different dates during the growing season.
From 1 to 11 days, the surviving population generally fluctuated from 102 to 104 colony forming units (cfu) of Eh112Y per g of leaves.
The populations from 22 to 122 days after application were generally less than 103 cfu per g of leaves.
The Eh112Y survived on blossoms far better than on leaves; the decrease in population was much less in the first 24 hr and the surviving population from 1 to 11 days after application of bacteria was generally from 106 to 107 cfu per g of blossoms.
Natural populations of E. herbicola on the leaves of ‘Idared’ and ‘McIntosh’, determined throughout the growing season, ranged from 0 to 3500 cfu per g of leaves.
During the first 24 hr after application, marked decreases in the recoverable populations were observed in all trials done on 10 different dates during the growing season.
From 1 to 11 days, the surviving population generally fluctuated from 102 to 104 colony forming units (cfu) of Eh112Y per g of leaves.
The populations from 22 to 122 days after application were generally less than 103 cfu per g of leaves.
The Eh112Y survived on blossoms far better than on leaves; the decrease in population was much less in the first 24 hr and the surviving population from 1 to 11 days after application of bacteria was generally from 106 to 107 cfu per g of blossoms.
Natural populations of E. herbicola on the leaves of ‘Idared’ and ‘McIntosh’, determined throughout the growing season, ranged from 0 to 3500 cfu per g of leaves.
Publication
Authors
R.S. Wodzinski, P. Sobiczewski, S.V. Beer
Keywords
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