Strawberry and Raspberry Pest Management in Wisconsin

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Table 9. Spray schedule for raspberries (continued) When to spray Problem Treatment a Formulation Rate/acre Remarks DURING HARVEST Diseases 38 gray mold Any of the fungicides listed for gray mold under Early Bloom EXCEPT Captevate. Insects AFTER HARVEST Diseases (late summer or early fall) Phytophthora root rot See labels for preharvest intervals. Repeat applications at 7-day intervals as needed. Captevate has a 3-day PHI. picnic (sap) beetles malathion c 50WP 2.0–4.0 lb Sap beetles breed in many locations outside raspberry plantings and can build to large numbers. Continuous invasion of the planting is likely and control is difficult. Wait 1 day after spraying malathion to resume harvest. fosetyl-aluminum 80WDG 5.0 lb Use enough water to wet foliage but no more than 100 gal/a. Apply in the fall, at least 30 days before anticipated leaf drop. mefenoxam Gold EC 0.25 pt/1,000 ft of row Gold GR 5.0 lb/1,000 ft of row Apply in 3-ft bands over rows. See label for details. phosphorous acid rates vary Formulations and rates vary. See product labels. rust diseases azoxystrobin F 6.0–15.5 fl oz myclobutanil 40W 1.25–2.5 oz propiconazole EC 6.0 fl oz Insects aphids Any of the insecticides listed for aphids under After Bloom. mites *bifenthrin WSB 16 oz 2EC 6.4 fl oz raspberry crown borer *bifenthrin WSB 16.0 oz 2EC 6.4 fl oz *diazinon 50WP 4.0 lb 4EC 2.0 qt *Bifenthrin has a 3-day PHI. Apply a drench of at least 100 gal/a before frost enters the soil (mid-October to early November). The *bifenthrin label recommends 200–400 gallons of spray mixture per acre for crown borer. * Restricted-use pesticide—can only be applied by a certified applicator. a On many labels, raspberry falls under the general category called “cane berries.” b Several liquid formulations of carbaryl also are available; check the label for proper use. Carbaryl may aggravate aphid and spider mite problems. c EC formulations of malathion also can be used. Several different EC formulations are available. Refer to the product label to determine correct application rate.
Raspberry Weed Management Effective weed management in raspberries combines cultivation, mulches, and herbicides. Weed management is essential to reduce competition for water, nutrients, and light during the development of the crop. Weeds can also harbor diseases and insect pests and can interfere with cultural practices and harvesting. Eliminate perennial weeds such as quackgrass, thistles, and dock the year before planting by using smother crops; summer fallow; nonresidual, systemic herbicides; and cultivated agronomic row crops. Not all weeds that occur in raspberry 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, pulling, and hand hoeing are necessary. Mulches can also control annual weeds. Both organic mulches, such as straw, leaves, sawdust, or wood chips, and synthetic mulches, such as polyethylene, minimize weed problems and conserve soil moisture. Young raspberry fields established with organic mulches typically produce significantly more canes than unmulched fields. After the establishment year, mulches may be less beneficial for plants due to rodent problems, higher disease incidence, and shallow rooting. You can control weed growth between the rows by planting sod such as Kentucky bluegrass, perennial rye, or red fescue at the time of planting. Sod prevents many weeds from growing, and occasional mowing slows the growth of other weeds. It also reduces dust and soil compaction, improves field access after rain or irrigation, and. helps maintain soil structure and organic matter levels. After planting, shallow cultivation in the plant rows can help reduce weed problems. Cultivation also serves to keep the rows narrow and to eliminate excess canes. To reduce the potential for root damage, don’t cultivate deeper than 2–3 inches. In established plantings, cultivation should stop before harvest to avoid knocking fruit off the canes. HERBICIDE USE Chemical weed control in established plantings is of most value in reducing weed populations in the planting row. Growers using an herbicide for the first time should limit the treated area until they are familiar with the herbicide’s effectiveness and crop safety. Sprayers should be calibrated at least each year. Young tissue-cultured plants are much more susceptible to herbicide damage than traditional dormant cane stock. Ideally, avoid using herbicides on these plants before fall of the establishment year or use the lowest labeled rates on new plants. If you are applying herbicides only to the planting row, be sure to calculate the actual area being sprayed and not the entire planting area. Otherwise you will overapply, leading to plant injury or death. Before using a herbicide, read and follow the label directions! Use only registered materials. Table 10 lists herbicides registered for use on raspberries in Wisconsin. Products are listed alphabetically and represent treatment options for each period covered. Inclusion of product names is not an endorsement of a manufacturer’s brand. 39
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 and 26: Table 6. Spray schedule for strawbe
Page 27 and 28: Strawberry Weed Management A succes
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: Table 9. Spray schedule for raspber
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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