Soybean:
Glycine max (L.) Merrill (Garst 269RR)
Bean
leaf beetle (BLB); Cerotoma trifurcata (Fostera)
Haskell Agricultural Laboratory
57905 866 Road, Concord, NE 68728
(402)-584-2261
CONTROL OF BEAN LEAF BEETLE IN SOYBEANS, 2001
Foliar treatments of registered and non-registered insecticides for
BLB control were applied to soybean plots on 27 May.
Experimental design was a randomized complete block with four
replications. All liquid insecticides were applied with a back-pack sprayer calibrated
to deliver 20 gpa at 30 psi. Two
days prior to application, beetle counts were taken on one meter of
soybean row at two random sites in each plot. Four post treatment beetles counts were taken
on day two, five, 11 and 15. Results
were analyzed using analysis of variance procedures. Treatment means were separated using LSD procedures.
Results
were variable on day two, 11 and 15.
Beetle counts were low for all treatments on day two because
of very cool air temperatures. On
day five, all treatments except for the fipronil treatment
resulted in significantly fewer beetles per two meters of row
than the untreated check.
| Rate | BLB/two meters of row1 |
|||||
|
Treatment/form |
(
lbs ai/acre) |
Pre |
d
two |
d
five |
d
11 |
d
15 |
|
Warrior T 1E |
0.030 lbs ai |
5.75c |
0.00b |
0.00b |
0.00c |
1.37a |
|
Dow XR-225 1.5 SC |
0.015 lbs ai |
10.87a |
0.00b |
0.00b |
0.00c |
1.87a |
|
Actara 25 WG |
0.230 lbs ai |
10.50ab |
0.00b |
0.00b |
0.75bc |
1.25a |
|
F0570 0.8 EW |
0.011 lbs ai |
10.25ab |
0.00b |
0.00b |
1.00bc |
1.87a |
|
F0570 0.8 EW |
0.014 lbs ai |
7.62abc |
0.12b |
0.00b |
0.37bc |
0.87a |
|
Fipronil |
100g/100kg2 |
0.37d |
0.87a |
1.87a |
1.25bc |
1.50a |
|
Untreated |
------- |
8.00abc |
0.87a |
2.62a |
3.50a |
1.37a |
1-Means
followed by the same letter are not significantly different
2-Treated seed
Soybean: Glycine max (L.) Merrill (NK S24-K4)
Bean leaf beetle (BLB); Cerotoma trifurcata (Fostera)
Jerry Echtenkamp & Tom Hunt
Haskell Agricultural Laboratory
57905 866 Road, Concord, NE 68728
(402)-584-2261
Foliar treatments
of registered and non-registered insecticides for BLB control were applied
to soybean plots on 27 May. Experimental
design was a randomized complete block with four replications. All liquid insecticides were applied with a
back-pack sprayer calibrated to deliver 20 gpa at 30 psi. Two days prior
to application, beetle counts were taken on one meter of soybean row at two
random sites in each plot. Four
post treatment beetles counts were taken on day two, five, 11 and 15.
Results were analyzed using analysis of variance procedures.
Treatment means were separated using LSD procedures.
Results
were variable on day two and 15. Beetle
counts were low for all treatments on day two because of very cool air
temperatures. On day five and 11, all treatments resulted in significantly fewer beetles per two meters of row than
the untreated check.
| Rate |
BLB/two meters of row--1 | |||||
|
Treatment/form |
|
Pre |
d
two |
d
five |
d
elevend |
15 |
|
Warrior
T 1E |
0.03
lbs ai |
3.12b |
0.00c |
0.00b |
0.12b |
0.87abc |
|
Gaucho
600FS |
250g/100kg
Seed |
0.25b |
0.12bc |
0.50b |
0.12b |
0.25c |
|
Adage
5FS |
200g/100kg
Seed |
0.12b |
0.25abc |
1.25b |
0.25b |
0.50bc |
|
Adage
5FS |
100g/100kg
Seed |
0.12b |
0.25abc |
0.25b |
0.25b |
0.87abc |
|
Adage
5FS |
50g/100kg
Seed |
0.25b |
0.75abc |
0.12b |
0.25b |
1.37ab |
|
Adage
5FS |
25g/100kg
Seed |
0.00b |
1.00abc |
0.25b |
0.75b |
0.87abc |
|
Actara
25WG |
0.23
lbs ai |
1.00b |
0.25abc |
0.00b |
0.75b |
1.12abc |
|
Untreated |
------- |
11.00a |
1.25a |
3.00a |
4.25a |
1.62a |
1--Means
followed by the same letter are not significantly different