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  1. Perennial sowthistle (Sanchus arvensis)

    https://pested.osu.edu/node/418

    problem is…perennial sowthistle causes reduced crop yields and increases costs of cultivation. ...

  2. Russian knapweed (Rhaponticum repens)

    https://pested.osu.edu/node/419

    allelopathic. The problem is…Russian knapweed persists in cultivated fields when established and produces deep ...

  3. Grapevines, uncultivated & in groups > 100 (Vitus spp.)

    https://pested.osu.edu/node/400

    if they are growing in groups of 100 or more and are not maintained (pruned, sprayed, or cultivated ...

  4. Shatter cane (Sorghum bicolor)

    https://pested.osu.edu/node/412

    in height. Life cycle: Summer annual Habitat: Cultivated fields – especially cereal crops. Leaf: ...

  5. Russian thistle (Salsola Kali var. tenuifolia)

    https://pested.osu.edu/node/411

    Cultivated, fields, roadsides, railroad right-of ways, pastures, waste areas, irrigated areas, river bottoms, ...

  6. Canada Thistle (Cirsum arvense)

    https://pested.osu.edu/node/397

    aggressively. Hand-pulling and cultivation are often ineffective control mechanisms because new plants sprout ...

  7. Giant Hogweed (Heracleum mantegazzianum)

    https://pested.osu.edu/node/399

    growing 15'-20' in height in large clusters. Sap may cause servere skin irritation. Life cycle: ... blisters usually appear 15 to 20 hours after contact with the sap and sunlight. ...

  8. Hairy white top or ballcress (Lepidium appelianum)

    https://pested.osu.edu/node/421

    lobes clasping the stem Flower: Clustered white flowers in racemes made up of 20-30 flowers. The flowers ...

  9. FIRST-TIME Fertilizer Certification Webinar- 3 HOUR

    https://pested.osu.edu/events/first-time-fertilizer-certification-webinar-3-hour

      March 28, 2024 8:30 am- 12:30 pm Registration Deadline: March 22, 2024 Cost: $35 This 3-hour training is ... Certified Applicators/Regulations Jocelyn Birt Water Quality Extension Associate 9:20 Water Quality Impacts ... Agronomic Systems 11:20 Nitrogen Recommendations to Maximize Economic Potential and Limit Edge of Field ...

  10. April 10, 2024- New Applicator Training- Webinar

    https://pested.osu.edu/events/april-10-2024-new-applicator-training-webinar

    Registration Schedule License and Study Materials Contact New Pesticide Applicator Training Classes (Core and ... Commercial Recertification Programs  in the winter.     Registration $35 Morning Session  - Core/Trained ... webinar. REGISTRATION IS CLOSED  This course will be taught as an online webinar. If you register, you will ...

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