PEACH HARVESTED FRUIT TREATMENT1
Diseases | Fungicide | Rate per 100 Gal |
Brown
Rot |
Scholar 50W, 1.92SC, EZ |
8-16 oz (see label for specific information on application methods, mixtures, etc.) or 16 fl oz of SC. See label for thermal fogging instructions for Scholar EZ. |
1 Do not make more
than one post-harvest application to the fruit by any
application method.
CAUTION: Flush and clean
the hydrocooler daily. With the losses of postharvest uses of
Benlate, Topsin-M and Botran, there is increased interest in
the use of chlorine
as
a
postharvest
hydrocooler treatment for stone fruits. The main value
of chlorine is to kill viable spores of brown rot and other
fungi to reduce the likelihood of serious infection in the
hydrocooler water. Although chlorine kills fungal spores in
the hydrocooler, it provides no residual fungicidal activity.
Several registered chlorine-generating materials are available
as calcium hypochlorite or sodium hypochlorite. Use only
products which are registered for the desired use and use
according to the label. Carefully monitor the concentration
and maintain a "dirt-free" hydrocooler because chlorine is
quickly de-activated by particulate matter. Because chlorine
is pH sensitive, water must be monitored frequently and
adjusted to neutral pH. Even with these factors controlled,
chlorine lacks residual activity for protecting bruised fruit.
As with any new practice or
product, caution is advised. Some possible drawbacks to
chlorine use are: 1) it is corrosive to metal, 2) it is
sensitive to pH (monitor water pH and chlorine concentration
regularly), 3) chlorine concentration must be recharged
frequently, and 4) although it is effective for killing spores
in water, it does not protect wounded tissue against
subsequent infection from spores lodged in the wound.
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Web Site Authors: Alan R. Biggs and Douglas G. Pfeiffer