Table 14 - Fungicide options for flyspeck and sooty blotch management *
During June and July Final Application
Fungicide |
Amount per 100 gals. dilute |
Normal days between applications |
Maximum rain between applications |
Maximum days from last spray to harvest |
Maximum rain from last spray to August 31 |
or mancozeb
or ziram+sulfur2 |
1 lb. 1 lb. + 1 lb. |
|
|
|
|
or Ziram (76%)2
or Captan (50%)3 |
1.5 lbs. 2 lbs. |
21 |
|
|
|
Ziram (76%)2 |
1 lb. |
|
|
|
|
Captan (50%)3 |
1 lb. |
|
|
|
|
1 Benlate and Topsin M must be used with a contact fungicide such as captan, ziram or mancozeb. Benlate and Topsin M have limited post-infection activity; captan, mancozeb, and ziram do not. Benlate applied within 40 days after petal fall can contribute to scarf skin, a film like skin disorder.
2 While ziram + sulfur is as effective as Benlate, both or either material alone may leave significant residues on harvested fruit. Ziram and sulfur are weak as scab fungicides. They are better suited for use after primary scab season has been successfully managed, and not before.
3 If the 77 day preharvest interval removes mancozeb as an option, captan is best among the remaining choices for protection against bitter rot.
* Based on New York recommendations by D.A. Rosenberger for orchards considered at moderate risk for these diseases, assuming that good spray coverage is achieved when fungicide is applied. Longer intervals may be successful in areas with reduced risk from these diseases, but such adjustments have not been defined.
On to Notes on Insecticides and Miticides