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Cereal Leaf Beetle Reference Page

Top: Crops: Small Grains: Wheat: Cereal Leaf Beetle:

Cereal Leaf Beetle Reference Page

Cereal Leaf Beetle Reference Page

Coleoptera (Beetles): Crysomelidae (Leaf Beetles) Species: Oulema melanopus

Key Hosts: Oats, Barley, Wheat, other grasses
Pest description and crop damage Adults are small beetles about 1⁄4 to 3⁄8 inch, with a metallic-blue head and wing covers, red pronotum, and yellow-orange legs. Larvae are yellow to yellow-brown with a dark mass of slimy fecal material on their backs.

Both adults and larvae feed on leaves. Feeding causes a characteristic stripping of the leaves.

Sampling and thresholds Treat when there are three larvae or eggs per plant up to the boot stage. After boot, treat at one larva per flag leaf.

Management—biological control

These insects are controlled easily by introduced parasitoids.

Management—chemical control

1. Beauveria bassiana GHA (Mycotrol Mycotrol CDMS website access to labels and MSDS pages O) at 0.5 to 2 pt/a. PHI zero days. Do not apply more than 6 pt/a.

2. carbaryl carbaryl CDMS website access to labels and MSDS pages (Carbaryl 4L) at 1 qt/a. PHI 7 days for foraging, 21 days for grain. Wheat only . No more than two applications after head emergence. Latex-based formulations such as Sevin Sevin CDMS website access to labels and MSDS pages XLR Plus are least hazardous to bees. Do not apply more than 3 qt/a per crop.

3. carbofuran (Furadan 4F) at 8 oz/a when insects appear. Idaho, Oregon (Malheur Co.) Apply before heading. Do not apply more than twice per growing season. Do not feed forage. Barley, oats, and wheat.

4. chlorpyrifos—

    a. Chlorpyrifos 4E AG and Lorsban 4E at 1 pt/a (Lorsban 4E) or 1 to 2 pt/a (Chlorpyrifos 4E AG). Wheat only . PHI 28 days. Do not feed straw for 28 days or graze within 14 days of application. Not more than two applications per year.
    b. Pilot 4E at 0.5 pt/a. Wheat only . PHI 28 days. Do not feed straw for 28 days or graze within 14 days of application. Not more than two applications per year.

5. cyfluthrin (Baythroid Baythroid CDMS website access to labels and MSDS pages 2) at 1.0 to 1.8 fl oz/a. Wheat only . PHI 30 days. Do not forage within 7 days of application. Not more than two applications per year.

6. gamma-cyhalothrin (Proaxis) at 0.01 to 0.015 lb ai/a (2.56 to 3.84 fl oz/a). Wheat only . PHI 30 days. Do not apply more than 0.03 lb ai/a (0.48 pt/a) per season.

7. lambda-cyhalothrin—

    a. Silencer, Warrior+Zeon, and Warrior T+Zeon at 2.56 to 3.84 oz/a. PHI 30 days. Wheat only . Do not apply more than 0.48 pt/a per season.
    b. Taiga Z at 2.56 to 3.84 fl oz/a. PHI 30 days. Do not allow livestock to graze in treated areas within 7 days after treatment. Do not feed treated straw to meat or dairy animals within 30 days after last treatment. Wheat only . Do not apply more than 0.48 pt/a per season.

8. malathion—

    a. Malathion 5EC at 1 to 1.5 pt/a. PHI 7 days.
    b. Malathion 5 at 1 to 1.5 pt/a. PHI 7 days. Do not graze within 5 days of treatment.
    c. Malathion 8 Aquamul at 1.25 pt/a. PHI 7 days.
    d. Fyfanon at 1 to 1.5 pt/a. Barley and wheat.
    e. Malathion ULV Concentrate at 4 to 8 fl oz/a. PHI 7 days.
    f. Fyfanon ULV at 4 to 8 fl oz/a—barley, oats, and wheat. PHI 7 days.

9. methomyl—

    a. Lannate Lannate CDMS website access to labels and MSDS pages LV at 0.75 to 1.5 pt/a. Do not exceed 1.8 lb ai/a/crop. Do not make more than four applications per crop. PHI 7 days.
    b. Lannate SP at 0.25 to 0.5 lb/a. Do not exceed 1.8 lb ai/a/crop. Do not make more than four applications per crop. PHI 7 days.

10. pyrethrin, pybuthrin—

    a. Pyrenone Crop Spray at 0.05 lb/a. PHI zero days.
    b. Prentox Pyronyl Crop Spray) at 0.05 lb/a.

11. spinosad (Success Success CDMS website access to labels and MSDS pages ) at 2 to 6 fl oz/a. PHI 21 days; 14 days for grazing or straw. Do not apply more than 19 fl oz/a per year.

12. zeta cypermethrin (MustangMax) at 1.76 to 4 fl oz/a. Wheat only. PHI 14 days, also for forage and hay. Do not make applications less than 14 days apart. Do not apply more than 0.125 lb ai/a per year.

Source: 2006 PNW Insect Management Handbook
  • Integrated Pest Management Information:
Key PNW Links

Access to Crop Protection Chemical Labels

Updated April 23, 2007-jn

Links:

  • NAPIS page on Cereal Leaf Beetle Provides general facts about cereal leaf beetle.
  • United States Department of Agriculture Animal and Plant Health Inspection Service. Information on Cereal Leaf Beetle.
  • Virginia Cooperative Extension Cereal Leaf Beetle Biology and Management.

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