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Pear fire blight control tests 1973

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Authors

W. O. Reil, Davis
S. V. Thomson
M. N. Schroth
W. H. Griggs, Davis
W. J. Moller, Davis

Publication Information

California Agriculture 28(4):4-6.

Published April 01, 1974

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Abstract

Copper compounds were the only currently registered bactericides that controlled streptomycin-resistant strains of firelight bacteria in Bartlett pear trees, but they induced considerable amounts of fruit russet. An anti-transpirant material reduced the amount of russet caused by the copper materials when applied alternately, or in conjunction with copper sprays. A new organic bactericide, MBR 10995, provided excellent control of fireblight in a limited trial but is not currently registered. Biological control of fireblight with application of bacteria antagonistic to Erwinia amylovora was somewhat effective. The efficacy of bactericides can also be determined by their effect on epiphytic populations of E. amylovora in blossoms.

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Author notes

Cooperators included W. H. Olson, Farm Advisor, Butte Co.; and R. R. Jeter, Farm Advisor, and V. Freitas (Extension Assistant), Glenn Co.; Heringer Enterprises, James Mills Orchards, Pfizer Chemical Co., 3-M Company and the Hart-Carter Spray Corp.

Pear fire blight control tests 1973

W. O. Reil, S. V. Thomson, M. N. Schroth, W. H. Griggs, W. J. Moller
Webmaster Email: wsuckow@ucanr.edu

Pear fire blight control tests 1973

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

W. O. Reil, Davis
S. V. Thomson
M. N. Schroth
W. H. Griggs, Davis
W. J. Moller, Davis

Publication Information

California Agriculture 28(4):4-6.

Published April 01, 1974

PDF  |  Citation  |  Permissions

Abstract

Copper compounds were the only currently registered bactericides that controlled streptomycin-resistant strains of firelight bacteria in Bartlett pear trees, but they induced considerable amounts of fruit russet. An anti-transpirant material reduced the amount of russet caused by the copper materials when applied alternately, or in conjunction with copper sprays. A new organic bactericide, MBR 10995, provided excellent control of fireblight in a limited trial but is not currently registered. Biological control of fireblight with application of bacteria antagonistic to Erwinia amylovora was somewhat effective. The efficacy of bactericides can also be determined by their effect on epiphytic populations of E. amylovora in blossoms.

Full text

Full text is available in PDF.

Author notes

Cooperators included W. H. Olson, Farm Advisor, Butte Co.; and R. R. Jeter, Farm Advisor, and V. Freitas (Extension Assistant), Glenn Co.; Heringer Enterprises, James Mills Orchards, Pfizer Chemical Co., 3-M Company and the Hart-Carter Spray Corp.


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