Strawberry and Raspberry Pest Management in Wisconsin

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Table 7. Spray schedule for strawberries—NONBEARING BEDS When to spray Problem Treatment Formulation Rate/acre Remarks BEFORE PLANTING Diseases (especially on fields following sod) 24 nematodes (dagger, lesion, root knot) soilborne fungi (Pythium, Phytophthora, Verticillium, etc.) *methyl bromide + *chloropicrin *Telone II *Telone C-17 *Vapam red stele fosetyl-aluminum 80WDG 2.5 lb/ 100 gal phosphorous acid rates vary Insects AFTER PLANTING Diseases (same time as “early spring” for bearing beds; diseases should be treated as leaves are expanding) Use soil fumigants well ahead of planting. Check on current registration status before using any of the listed chemicals. Follow instructions and recommendations on label for applying. Methyl bromide + chloropicrin, Vapam, and Telone C-17 help control weeds, insects, certain soilborne fungi, and nematodes. Telone II is only effective against nematodes. Plant pathogen-free transplants. See comments in “Preplant Soil Fumigation.” Apply as a pre-plant dip to strawberry roots and crowns for 15–30 minutes. Plant within 24 hours after dipping. soil insects *diazinon 4EC 1.0 qt Apply as broadcast treatment. Mix with upper 3–4 inches of soil immediately after application. This treatment is especially necessary if fields were in sod or very weedy before plowing. If you fumigate, this treatment is not needed. leaf diseases: angular leaf spot (see remarks) leaf blight leaf scorch leaf spot captan 50WP 3.0–6.0 lb copper various see label dodine 65WP 1.5–2.0 lb myclobutanil 40W 2.5–5.0 oz propiconazole SE 4.0 fl oz To control leaf diseases, start spraying before symptoms appear on foliage. If angular leaf spot has been a problem in previous years, include a copper fungicide (see “Disease Notes”). Copper may cause a slight chlorosis or yellowing of the foliage of some varieties; discontinue use if phytotoxicity occurs. red stele mefenoxam Gold EC 1.0 pt Apply in sufficient water to move the fungicide into the root zone. Insects ADD’L SPRAYS Insects (same time as sprays for bearing beds) fosetyl-aluminum 80WDG 2.5–5.0 lb Apply in sufficient water to wet foliage thoroughly. phosphorous acid rates vary Formulations and rates vary. See product labels. aphids *bifenthrin WSB 6.4–32.0 oz endosulfan 50WP 1.0 lb 3EC 1.3 qt malathion 25WP 6.0–8.0 lb 8EC, 8F 1.5–2.0 pt aphids cyclamen mite leafhoppers spider mite strawberry leafroller Use one of the insecticides that would be used at the same time for bearing beds. * Restricted-use pesticide—can only be applied by a certified applicator. Two aphicide treatments in spring before bloom and two in fall before mulching help control strawberry viruses in new and bearing fields. If cyclamen mites are a problem, make a separate application of endosulfan 3EC at 2.66 qt/a (or 50WP at 4 lb) under high pressure and high gallonage (400 gal/a). If leafrollers are a problem, apply carbaryl at the rates listed under After Harvest. For spider mites, apply *abamectin 0.15EC at 16 fl oz/a or fenbutatin-oxide 50WP at 1.5–2.0 lb/a or *fenpropathrin 2.4EC at 16–21.3 fl oz/a.
Strawberry Weed Management A successful weed management program depends on the integration of mechanical and chemical methods. Not all weeds that occur in strawberry plantings in Wisconsin are controllable with herbicides. Additionally, repeated use of the same herbicide on the same field growing the same crop may lead to weed resistance. In these cases mechanical means such as cultivation, hand pulling, and hoeing are necessary. Rotation of strawberries with crops that require different herbicides and cultivation practices should result in better weed management. Weeds cause a multitude of problems in strawberry production, including— • increased cost of irrigation and fertilizers due to increased competition, • lowered berry yields and quality, • harvesting is more difficult and less enjoyable for customers, • increased difficulty implementing nutrient management and integrated pest management, • interference with spray applications, • act as alternate hosts for a variety of diseases, and • provide a haven for undesirable insects. Weeds and weed seeds are always present. If no control measures are taken, the size and number of weeds will always increase as the growing season progresses. The following strategies help to effectively control weeds: • Use well-adapted, vigorous cultivars. • Plant narrower row spacings and adjust plant densities. • Encourage rapid stand establishment. • Plan shorter crop rotations. • Use clean, weed-seed-free mulches such as rye straw. • Always scout for new weeds or “outbreaks” of common weeds in your fields. Document them on a map. • Clean farm equipment between fields (an excellent practice for insect and disease control as well). • Maintain good berry crop health. • Choose the correct herbicide for the situation. Accurately calibrate the sprayer and apply the appropriate labeled rate for the soil type and weed pressure level. • Mow or treat weeds on the field edge before they go to seed. Eliminate perennial weeds such as quackgrass, thistles, dandelions, and dock the year before planting strawberries by using smother crops; summer fallow; non-residual, systemic herbicides; and cultivated agronomic row crops. Rye, for example, is an ideal crop to plant prior to strawberries. It is sufficiently aggressive to outcompete most weeds but also has allelopathic effects to suppress emerged and germinating weeds. Rye used as a winter mulch is also desirable for strawberry culture. 25
Page 1 and 2: A1934 Strawberry & Raspberry Pest M
Page 3 and 4: INTEGRATED PEST MANAGEMENT FEDERAL
Page 5 and 6: PESTICIDES AND COMMUNITY RIGHT-TO-K
Page 7 and 8: Table 2. Examples of pesticides wit
Page 9 and 10: Table 3. Toxicity categories of pes
Page 11 and 12: Reportable spills involving SARA su
Page 13 and 14: Planter granular applicators can be
Page 15 and 16: Please note that this recycling pro
Page 17 and 18: Strawberry Disease Management Read
Page 19 and 20: Table 5. Disease resistance ratings
Page 21 and 22: Strawberry Insect Management INSECT
Page 23 and 24: Table 6. Spray schedule for strawbe
Page 25: Table 6. Spray schedule for strawbe
Page 29 and 30: label for specific instructions on
Page 31 and 32: Table 8. Weed management for strawb
Page 33 and 34: Table 8. Weed management for strawb
Page 35 and 36: products are taken up through leave
Page 37 and 38: Raspberry Insect Management Several
Page 39 and 40: Table 9. Spray schedule for raspber
Page 41 and 42: Raspberry Weed Management Effective
Page 43 and 44: Table 10. Weed management for raspb
Page 45: SPRAY RECORD SHEET Date applied Mat

Strawberry and Raspberry Pest Management in Wisconsin

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