Example Grape Spray Guide Specific for: Blanc Du Bois, Lenoir, Norton

Transcription

1 Example Grape Spray Guide Specific f: Blanc Du Bois, Lenoir, Nton Imptant: This example spray program is intended to serve only as a template to provide guidance to clients of Westover Vineyard Advising in constructing their annual disease and pest management program. It provides examples of products and typical rates, thus allowing a grower to plan their pesticide inventy and approximate application stages. This example guide is intended to be used only under direct guidance by Fritz Westover, Viticulturist with Westover Vineyard Advising. The products listed in this example may not be effective without proper consideration of seasonal weather conditions and frequent communication with Westover Vineyard Advising. Vineyard pest and disease management is a dynamic and ever changing process that must be custom tailed to each site, variety, and season. Please communicate with your consultant and follow all label restrictions and safety precautions f any product applied on your farm. This document is privileged to registered clients of Westover Vineyard Advising and cannot be distributed reprinted f non-clients. Copyright Westover Vineyard Advising, LLC fritzwestover@gmail.com vineyardadvising.com

2 Example Grape Spray Program f Vineyard with Mixed Hybrid Grapes Blanc Du Bois, Lenoir, Nton Growth Stage Dmant: Target Problems Products Rate/Acre See University Fungicide & Insecticide Efficacy Tables f Alternatives * Rally Dmant: Note: Do not apply sulfur to Nton/Cynthiana. Lime Sulfur Shoot length: 0.5 2" Shoot length: 5 10" Low Disease Pressure + Dithane Rampart Dithane Dithane + Dithane (Rampart, Prophyt) Rampart sheets/

3 Growth Stage Target Problems Products Rate/Acre See University Fungicide & Insecticide Efficacy Tables f Alternatives Shoot length: 15 30" Low Disease Pressure * Prebloom * RallyRevus Top Revus Top Dithane Pre Bloom Low Disease Pressure + + Pristine Rally Revus Top Immediately after fruit set Berries are "bb" size smaller. Low Disease Pressure Use one fungicide option above + one insecticide below Dithane Dithane RallyRevus Top PristinePristine Pristine Intrepid

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5 Growth Stage Target Problems Products Rate/Acre See University Fungicide & Insecticide Efficacy Tables f Alternatives Veraison Bunch rots Low Disease Pressure (50% col change) Downy mildew No spray Powdery mildew Pristine (*not on Nton) Pristine (*not on Nton) Captec 4L + Rampart 10.5oz 12.5oz to 23oz (2qt) + ( 2.15pt/50 gal water) Various bunch rots can initate from veraision through harvest. Numerous fungal ganisms can infect ripening fruit. Captan has a broad spectrum control f several of the fungi in the summer bunch rot complex, however if fruit splits due to excess rain, a fungicide is not very helpful as much of the rot in damaged fruit is bacterial in nature. Pristine also provides general control of bunch rot and botrytis at the high labeled rate (23oz). 30 days pre-harvest Bunch rots Low Disease Pressure to harvest Downy mildew No spray Captec 4L + Rampart Rampart Post-harvest Downy mildew Dithane F45 2.5qt (2qt) + ( 2.15pt/50 gal water) 2.15pt/50 gal water Check pre harvest interval (PHI) f all products. Follow all labeled restrictions. Captec/Captan residue on grapes may cause problems with sluggish stuck fermentation in the winery. Use of Captec within 30 days of harvest should be communicated with the winemaker. Post harvest sprays are imptant if wet weather follows harvest. Downy mildew can cause severe pre mature defoliation of vines. Inexpensive protectant fungicides with low resistance risk f downy mildew are best options. Do not spray me than the labeled maximum/acre/product/season. Disclaimer This document provides examples of common fungicides and insecticides registered f grapes. Changes in pesticide regulations occur constantly and human err are possible. Questions concerning the legality and/ regulation status f pesticide use should be directed to the appropriate Extension Agent/Specialist state regulaty agency. Read the label befe applying any pesticide. The label is the law. Westover Vineyard Advising, LLC and its employees assume no responsibility f the effectiveness results of any chemical pesticide usage. No endsements of products are made n implied, n does the lack of mention of any product imply inefficacy. This example spray guide is intended to assist clients of Westover Vineyard Advising in the process of constructing a grape spray program and does not replace the need to keep up with current seasonal conditions and changes in pesticide regulations. Use of this document will be me effective if supplemented with regular input and to communication with your viticulture advis.