Weed Management in the Vineyard from Spring to Fall Doug Doohan Horticulture & Crop Science, OSU Doohan.1@osu.edu 330 202 3593
Characteristics of Weeds • Diversity & density can be astounding • Adaptations enable species to survive • Adapted to co-exist with the crop • Modify behavior to cope with weed control • Germination, emergence and reproduction is environmentally timed. • Impact on crops almost always underestimated
3 things that make or break weed control • site preparation • Right herbicide, applied at the right time, and at the right rate • Preventing re-infestation
Uncontrolled Perennials Invade Area Under the Trellis from Sod
Site preparation starts 2 years before planting- • Fallow (sod): • Tillage to break dormancy in rhizomes/ rootstocks • Glyphosate (+ Stinger) on regrowth; repeat as needed • Fall-seeded Cover • Roundup Ready Crops: up to 3 applications/ year 60-75 days apart • Seeding of permanent inter-row covers
Site Preparation Credit: igrow.org -2 years before planting- stage of growth - CT: early bloom or rosette stage in fall - QG: 4 to 5 leaf stage to heading - BW: early bloom 1 to 2 qt/A, in 8-12 GPA - fall best - till 4-7 days later
Inter-row Cover Crops • Tall/ hard fescue ( can take more than 1 year to fully establish) – Late summer/ early fall – 50 - 75 lb/A/ 25 – 50 lb/A – Include a trace of perennial ryegrass – 50 lb N/ A at seeding/ spring • Bed Formation/ Irrigation • In-row – Perennial rye
Weed Control Gallery Roundup Gallery + Surflan
Weed-free zone 18- 24” each side of row. Raspberry tolerance to clopyralid – Current Problem
Right herbicide, applied at the right time, and at the right rate Credit: rayshorticulture.blogspot.com
Planting May June July August September October Year Grass Select** Poast Fusilade Fusilade Poast Select** Grass & Treflan BL Surflan Surflan Surflan Prowl* Prowl * BL & Snapshot** Snapshot** Grass Venue*** Venue*** Annuals Aim Aim Aim Gramoxone Gramoxone Gramoxone Rely Rely Rely Reglone Reglone Reglone Chateau**** Perennials Roundup Roundup Roundup Roundup Roundup Roundup * Dormant only, ** Non-bearing only, *** Include surfactant or crop oil, ****Grow tubes & trellised only
May June July August September December All of the previous herbicides can be used Year - 2 Matrix Matrix Annuals Perennials Casoron Year - 3 Zeus Prime XC & Zeus Prime XC Annuals Rely &/ or RU & Rely &/ or RU Casoron Annuals Princep & Princep & Poast Matrix + RU Matrix + RU Fusilade Gramoxone Annuals Karmex & Karmex & Reglone Matrix + RU Matrix + RU Rely Venue Year - 4 Zeus XC & Zeus XC & Aim Annuals Rely &/ or RU Rely &/ or RU Year - 5 Alion & Casoron Annuals Rely &/ or RU
Ward & Majek, 2007
Herbicides - choice & timing • Poast – 1-2.5 pt/A • 7 day PHI Select Max
Source: Breth & Tee
Source: Breth & Tee
Tank Mix Combinations
Summary • Know Crop/ Herbicide History Before Planting • Begin Eradicating Perennials 12-18 months before planting • Use PRE Herbicides for “Broad - Spectrum” Weed Control after Transplanting • Incorporate Other Chemistries in Year 2 and beyond • Develop and Implement a Clean Up Plan
Weed Control in Small Fruit Crops Funding & Support • Ohio Grape Industry Committee • FMC Corporation • Bayer AgroSciences • OARDC
Recommend
More recommend
