How to Manage Pests
UC Pest Management Guidelines
Bermudagrass Seed Production
Bermudagrass Mirid
Scientific Name: Trigonotylus tenuis
(Reviewed 1/07,
updated 1/07)
In this Guideline:
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DESCRIPTION OF THE PEST
This plant bug may be
abundant on bermudagrass florets and leaves. Trigonotylus tenuis is a small,
light green, narrow, stilt-legged seed bug. Adults and immatures may be found
in bermudagrass at any time from spring through fall.
DAMAGE
Trigonotylus tenuis is of
greatest concern during spring and fall seed-production seasons from regrowth
through bloom. Its feeding can reduce plant vigor, stunting growth and delaying
the development of florets. Adult feeding on developing seeds also reduces seed
yields.
MANAGEMENT
Monitor seed fields with
a sweep net for Trigonotylus tenuis from regrowth through bloom.
Treat if Trigonotylus tenuis counts reach 100 per sweep. When
fields are developing seed, monitor for adult bugs only, as nymphal mouthparts
do not appear to be large enough to attack developing seed. One adult mirid per
90° sweep 2 weeks before summer harvest can reduce uncleaned seed yields
by almost 20 pounds per acre.
| Common
name |
Amount/Acre |
R.E.I. + |
P.H.I.+ |
| (trade name) |
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(hours) |
(days) |
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| When choosing a
pesticide, consider information relating to the impact on natural enemies and honey bees and the environment. |
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| A. |
ACEPHATE |
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(Orthene) 75S |
1.33 lb |
24 |
0 |
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MODE
OF ACTION: An organophosphate (Group 1B)1 insecticide. |
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COMMENTS:
Available for use under a 24(c) registration. Do not feed crop residue to
livestock or allow animals to graze treated areas. Do not apply this product through any type of irrigation system. |
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UC IPM Pest Management Guidelines: Bermudagrass Seed Production
UC ANR Publication 3472
Insects and Mites
E. T. Natwick, UC Cooperative
Extension, Imperial Co.
M. D. Rethwisch, UC Cooperative Extension, Riverside Co.
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