25 November 2016
By: Jyri Kaapro
Many turf professionals apply products at the same spray volume with the same nozzles application after application, regardless of the product used. To limit interference with golfers, spray volumes are determined to limit tank refills and changing nozzles requires additional time. However, spray volume and droplet size, can dramatically affect efficacy of products.
Following is a table outlining general guidelines for nozzles and spray volume for each type of product applied. Always follow label directions.
|Systemic Herbicides: Spearhead, Tribute, Destiny||400–600||200–400||Medium to fine||Need to keep AI on the foliage|
PRE herbicides, scarab insecticides, fungicides for soil borne-diseases (ERI, fairy ring, Spring Dead Spot, etc.)
|600–800+||400–800||Coarse||Must move AI past the foliage. Follow with watering-in to further move AI down in to the soil|
|600–800||400–800||Medium to fine||Good coverage is needed since AI won’t move within plant.|
|Systemic Fungicides for Foliar Diseases
Dedicate, Interface, Bayfidan
|600–800||200–400||Medium to fine||Insure AI remains on the leaf. Use higher spray volume for diseases lower in the plant like anthracnose basal rot.|
Send an e-mail or photograph to jyri.kaapro@Envu.com if you have any experiences of turf with either of these symptoms.
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