Comparative effectiveness of two fungicides for celery early blight
control.


 2/
Fungicide-2
Daconil 2787
Dithane M-45


1-11-68 sig.(.05)


 1'
Disease severity-'
1-22-68 sig.(.0l)
 3.0 a
 3.4 b


1-26-68 sig.(.05)


3.3


-' Horsfall-Barratt rating scale. Data are averages of four replications taken
 over four fungicide rates and two interval periods.
-/ See Table I for rate and application.


Table III. Effect of spray interval on disease severity.-/


Frequency
(Applications/wk)


1-11-68 sig.(.001)
 3.1 b


2.4


 2/
Disease severity-_
1-22-68 sig.(.001) 1-26-68
 3.4 b 3.2


2.9


2.8


 See Table I for fungicide and rate.
2/
- Horsfall-Barratt rating scale. Data are averages of four replications taken
 over four fungicide rates and two fungicides.


Table IV. Effect of fungicide rate on disease severity. /


1-11-68 sig.3/
 3.2 b
 2.8 ab
 2.5 a
 2.5 a


 2/
Disease severity-
1-22-68 sig.
 3.8 b
 3.9 b


2.8
2.7


 See Table I for fungicide and interval.
/ Horsfall-Barratt rating scale. Data are averages of four replications taken
 over two fungicides and two spray intervals.
3/
 Duncan's multiple range test. Treatment means followed by the same letter are
 not significantly different at the 5% level.


EES-68-7

225 copies


Table II.


sig.(.05)
 b
 a


Rate
Ibs/A
0.25
0.5
0.75
1.0


1-26-68
 3.2
 3.4
 2.9
 2.7


sig.
 b
 b
 a
 a


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