While dealing with getting Kasumin 2L registered here in MA, it was pointed
out that on the Federal label it says:
• Do not apply kasugamycin in orchards in which the soil has been
fertilized with animal waste/manure.
• Animal grazing in treated areas is prohibited. The public must be
notified by
Thanks for the follow-up information, Brian. Using six strep sprays during
bloom, while I can see how it may be necessary, does make me a bit more uneasy
about selecting for strep resistance. In northeastern United States, we often
need two sprays during bloom, sometimes three, and very
I should have added one more thought: Probably the very best strategy for
avoiding selection for strep-resistant Erwinia amylova (Ea) is to prevent fire
blight from becoming established in the orchard in the first place. To that
end, the integrated strategy that Brian described (copper early,
Hi Dave,
I've wondered about this. In several of our orchards. All of the
epiphytes all nearly have 100% of the population strep resistance even
at the start of the season, so in theory no applications of strep would
just as bad as several. The predominance changes over the season and it
I should be at 4 sprays or less (3 last
year) most of the time. The six sprays occurred after the "year
without a winter" several years ago, when the low for the entire
winter was 15F and that was only reached twice. We were 5 below
here last year, and normally
