Biology Reference
In-Depth Information
Fungicides
Azoxystrobin
of water. Stock solutions are made up for each
chemical (1 pound per gallon of water), the lime
solution placed first in the sprayer, diluted to
nearly the full amount, and the copper sulfate
solution added. Or, for power sprayers, finely
divided copper sulfate can be washed through the
strainer into the spray tank, and when the tank is
two-thirds full the weighed amount of hydrated
lime can also be washed through the strainer
while the agitator is running. Casein or other
spreader is added toward the end. Phytotoxicity
comes from both the lime and the copper. Plants
are often stunted, with yield reduced; fruit-setting
of tomatoes may be delayed. Bordeaux is not safe
on peaches during the growing season, may burn
and russet applies (both foliage and fruits), may
cause red spotting, yellowing, and dropping of
rose leaves (often confused with blackspot by
amateur and sometimes professional gardeners),
and may cause defoliation of Japanese plums.
Injury is most prominent early in the season
when temperature is below 50 F and in dull,
cloudy weather when light rain or high humidity
prevents rapid drying of the spray. Late summer
use of bordeaux is credited with making some
plants more susceptible to early fall frosts. For
ornamentals, a 4-4-100 mixture is usually strong
enough and can be made in small amounts by
dissolving 2 ounces of copper sulfate in 1 gallon
of water, 2 ounces of hydrated lime in 2 gallons of
water, pouring the copper sulfate solution into the
lime water, and straining into the spray tank
through fine cheesecloth. For some plants, such
as stone fruits, the proportion of lime is increased;
Abound, Amistar, Bankit, Heritag, Ortiva, Priori,
Quadris
Systemic fungicide for control of foliar and
soil borne diseases.
Bacillus subtilis
Serenade, Subtilex, Taego, Companion, Kodiak
Used as a seed treatment to suppress Rhizoc-
tonia and Fusarium diseases.
Benalaxyl
Galben, Tairel
Systemic fungicide.
Bitertanol
Bacseal, Baycor, Baycoral, Baymat, Zaron
Fungicide.
Bordeaux Mixture
Comac
Bordeaux mixture is made in varying concen-
trations. The most usual formula is 8-8-100 (often
stated as 4-4-50), which means 8 pounds copper
sulfate, 8 pounds hydrated lime to 100 gallons
 
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