How to Manage Pests
UC Pest Management Guidelines
Lettuce
Foxglove Aphid
Scientific Name: Aulacorthum solani
(Reviewed 8/07,
updated 8/07)
In this Guideline:
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Foxglove aphid is usually light green with darker green spots at the
base of the cornicles but has several color forms, ranging from green to orange
to pink. Some of the wingless aphids have many black markings on the top of the
abdomen as well. The winged adults are browner in color than the wingless
forms, but also have various black markings.
Foxglove aphid is a pest of lettuce in California's Central
Coast, although it may also occur on other crops. Winged aphids are nearly
indistinguishable in the field from another pest of lettuce, the lettuce aphid
(Nasonovia ribis-nigri). These two
aphids, however, can be distinguished from green peach aphid,
which has prominent, converging antennal tubercles.
Foxglove aphid has a very short life cycle and populations can
build rapidly. It has a wide host range.
Foxglove aphids feed deep inside the plant on younger leaves. It is
known to vector several virus diseases including lettuce mosaic virus.
Monitoring requires
care in order not to miss early infestations that are hidden within the
lettuce. This aphid has a tendency to disperse in the plant rather than forming
colonies as green peach aphid does. Control of this aphid is difficult because
of its rapid population growth combined with its preferred locations deep
within the head.
| Common name |
Amount to Use |
R.E.I.+ |
P.H.I.+ |
| (trade name) |
|
(hours) |
(days) |
|
| When choosing a pesticide, consider information relating
to the impact
on natural enemies and honey bees and environmental impact.
|
| |
| A. |
IMIDACLOPRID |
| |
(Admire) Pro |
7–10.5 fl oz/acre |
12 |
21 |
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MODE OF ACTION GROUP NUMBER1: 4A |
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COMMENTS: Apply as a soil application. Do not apply more than
0.5 lb a.i. of imidaclophid/acre/year. Do not apply more than 0.38 lb a.i. of imidaclophid/acre/year. |
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...OR... |
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(Provado) 1.6F |
3.75 fl oz |
12 |
7 |
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MODE OF ACTION GROUP NUMBER1: 4A |
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COMMENTS: Do not apply more than 0.24 lb a.i. of imidaclophid/acre/year. |
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| B. |
OXYDEMETON-METHYL* |
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(MSR Spray) |
1.5–2 pt/acre |
48 |
See label |
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MODE OF ACTION GROUP NUMBER1: 1B |
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COMMENTS: Do not apply more than 3 times/season. Labeled for head lettuce only. |
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| C. |
DIMETHOATE |
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(Dimethoate E267) |
0.75 pt |
48 |
Head lettuce: 7 |
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Leaf lettuce: 14 |
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MODE OF ACTION GROUP NUMBER1: 1B |
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| D. |
ACETAMIPRID |
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(Assail) 70WP |
0.8–1.2 oz/acre |
12 |
7 |
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MODE OF ACTION GROUP NUMBER1: 4A |
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COMMENTS: Foliar application. Allow 7 days between applications with a maximum of 5 applications/season. |
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| E. |
PYMETROZINE |
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(Fulfill) |
2.75 oz |
12 |
7 |
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MODE OF ACTION GROUP NUMBER1: 9B |
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UC IPM Pest Management Guidelines: Lettuce
UC ANR Publication 3450
Insects and Other Arthropods
E. T. Natwick, UC Cooperative Extension, Imperial Co.
W. E. Chaney, UC Cooperative Extension, Monterey Co.
Acknowledgment for contributions to the insects and mites section:
N. C. Toscano, Entomology, UC Riverside
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