Control of European Asparagus
Aphid with Foliar Applied Insecticides
Brachycorynella asparagi
Benny Fouche & Debra Boelk
University of California
Cooperative Extension
420 South Wilson Way
Stockton,
California 95205-6243
Experimental plots were established at Victoria
Island Farms, west of Stockton, California. The purpose of the research was to
evaluate the effectiveness of nine different materials for control of European
asparagus aphids feeding on asparagus fern.
Plot size was 5 feet wide by 40 feet long with 4 replications. The treatments were applied with a Co2
powered backpack powered spray boom with the application made from both sides
of the bed. A volume of 50 gallons/
acre was used in order to simulate the same type of coverage obtained by the
grower. Three TJ-60 8002-VS twin even
flat spray tips were used to produce fine particle size spray droplets. One application was made on October 5th,
2005.
Materials in Trial
|
Products |
Formulation |
Prod/Acre |
|
Untreated Control |
|
|
|
Provado |
1.6 F |
8 oz. |
|
Assail |
30 SG |
2.5 oz.
|
|
Venom |
20 SG |
300 gr. |
|
Platinum
|
21.6 % |
8 oz |
|
Fulfill |
50 WDG |
2.75 oz
|
|
Veggie Pharm |
5 % |
12.5 Gallons |
|
Warrior |
11.4 % |
3.84 oz |
|
V10170 |
50 WDG |
40 gr |
|
Knack |
0.86 EC |
16.4 oz |
Aphid behavior was evaluated by beating
the fern in three areas of the plot in each of 4 replications and rapidly counting
aphids observed on an 8 ˝ inch by 11 inch foam board. While many lady bird beetles were observed in this trial, they
did not provide adequate control until after the aphid numbers had been at
damaging levels for some time in the asparagus fern. Evaluations were made for three consecutive weeks following the
application.
Control of European Asparagus Aphid, Brachycorynella asparagi, 2005
|
Products
|
Formulation
|
Prod/Acre
|
Aphids
11 Oct
|
Aphids
17 Oct
|
Aphids
27 Oct
|
|
Untreated Control |
|
|
722b
|
572b
|
1861c
|
|
Provado |
1.6 F
|
8 oz.
|
189a
|
87a
|
45a
|
|
Assail |
30 SG
|
2.5 oz.
|
67a
|
166a
|
139a
|
|
Venom |
20 SG
|
300 gr.
|
112a
|
87a
|
392a
|
|
Platinum
|
21.6 %
|
8 oz
|
83a
|
81a
|
28a
|
|
Fulfill |
50 WDG
|
2.75 oz
|
194a
|
213a
|
1161b
|
|
Veggie Pharm |
5 %
|
12.5 Gal
|
116a
|
47a
|
176a
|
|
Warrior |
11.4 %
|
3.84 oz
|
8a
|
3a
|
5a
|
|
V10170 |
50 WDG
|
40 gr
|
35a
|
28a
|
57a
|
|
Knack |
0.86 EC
|
16.4 oz
|
110a
|
284a
|
231a
|
Means in a column followed by the same letter are not
significantly different at the 5%Level.DMR
All materials
provided good control of spider mites by the end of the trial with the
exception of Fulfill. Coverage at 50
GPA was minimal for contact materials and better control could also be expected
if air blast type sprayers were used to help penetrate the dense fern.
