Publication 360, Guide to Fruit Production :
Grape Calendar - First leaf, 1.25 to 5.0 cm shoot length


Pub 360, Guide to Fruit Production > Chapter 6: Grapes > Grape Calendar > First leaf, 1.25 to 5.0 cm shoot length

Excerpt from Publication 360, Guide to Fruit Production 2012-13,
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Cover of Publication 360, Fruit Production Recommendations

Table of Contents

  1. First leaf, 1.25 to 5.0 cm shoot length
  2. Other grape calendar sections
  3. Other topics on grapes
  4. Grape calendar (PDF 142 kb)
  5. Pub 360 - Chapter 6 Grapes (PDF 156 kb)
  6. Related Links

Phomopsis cane and leaf spot (First leaf, 1.25 - 5.0 cm shoot length)

  • Materials: Use one of : Leaf infection by and resultant puckering.
    • Supra Captan 80 WDG @ 1.2 kg/1,000 L water
      or Maestro 80 DF @ 2.0 kg/ha
    • Folpan 80 WDG @ 1.25 kg/ha
  • Comments: Spray susceptible varieties, especially if the weather is wet or there is a history of phomopsis in the vineyard. See Table 6-5. Relative Susceptibility of Grape Cultivars to Diseases. Use enough water to ensure complete coverage. Alternate row spraying will not give adequate protection from phomopsis.

Precautions

  • Read the product label and follow all safety precautions. Some grape varieties are sensitive to Sulphur, Copper, Flint, Pristine, or other products. See Table 6-5. Relative Susceptibility of Grape Cultivars to Diseases, for specific information.
  • For preharvest intervals, re-entry periods, maximum number of applications and chemical groups, see Table 6-4. Products Used on Grapes.
  • Resistance management: To delay development of resistance to fungicides, miticides and insecticides, follow resistance management guidelines outlined in Pest Resistance to Insecticides, Fungicides, Miticides. Products belonging to the same chemical group are grouped together in the calendar.
    In addition, take the following steps to avoid rapid development of fungicide resistance:
    • Do not reduce rates below those specified on the label.
    • Do not use Nova, Inspire, Sovran, Flint, Vivando, Lance, Cantus, Revus, or Pristine as eradicants when sporulating lesions of the target disease are present
    • Use sufficient water to provide thorough coverage.
  • Preharvest intervals: Contact the processors and wineries directly in regard to their preharvest interval policy. Preharvest intervals listed in Table 6-4. Products Used on Grapes are taken from product labels. In some cases, regulations on residues in finished products (e.g. wine) are much more stringent. Many processors require longer preharvest intervals than stated on product labels. Some processors and wineries also have special restrictions for certain pest control products regarding number of applications or application after a certain crop stage. Consult the grape purchaser for more details.
  • Spray water volumes: Sufficient water volumes are necessary to provide complete coverage with grape fungicides, miticides and insecticides. Increased water volumes are necessary as the season progresses and canopies grow. Canopy management through hedging, leaf-pulling and shoot thinning, as well as proper sprayer calibration, are critical to ensure proper spray coverage. Sufficient coverage and efficacy are not possible if water volumes are inadequate. Some types of sprayers are able to provide sufficient coverage with less water than others. Consult equipment dealers or professional crop consultants about the amount of water needed to ensure adequate coverage. Where the product rate is listed in amount per 1,000 L and if a water volume is not provided on the label, use enough water to wet the foliage to the near-drip point. Read and follow water volume requirements on all product labels.

Related Links


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E-mail: ag.info.omafra@ontario.ca


Author: OMAFRA Staff
Creation Date: 25 June 2007
Last Reviewed: 10 May 2012