I missed the time frame to spray my cherries for leaf spot, is there a fungicide that stops an already occurring infection?
I hope so or my Montmorency cherry is a goner
Do you apply anything as of now or are you thinking of a specific one
Bacterial leaf spot on all Genus Prunus & interspecifics is a gram-negative bacterial infection.
It is triggered by unchelated Ferric Oxide Iron.
Mixing 1 teaspoon Citric Acid per gallon of water & saturating all above ground surfaces can reduce the severity of the problem.
It doesn’t kill the bacteria, it simply causes it to transition from invasive pathogenic behaviors to benign dormant status.
You need to spray weekly to use Citric Acid as a control.
1 teaspoon per gallon as a foliar & bark spray.
Immunox or captan works great. You will lose all leaves infected now so don’t wait to long.
mine had it lightly last summer. only lost the lower 1/4 leaves. sprectracide immunox is a good preventative. it wont save infected leaves but will protect the uninfected from getting it.
Ok is immunox systemic
Far from organic it’s a fungicide. The complete opposite of organic but it works.
I meant like is it safe for use if I eat from the tree? Also is it a systemic?
It doesn’t wash off so my opinion no its not safe during fruiting season. Never spray with fruit on my trees. Harvest my fruit then I spray
Please google and Read the label of Immunox. It will tell you when to spray on what, how much and how long before you can pick fruit.
You need to read the label of materials you want to spray your trees with, no matter if it is organic spray or not. Organic does not mean totally safe.
Alright, that’s my situation, by next year things on the branches clear up right?
This is the exact one we are talking about right?
I prefer Liqui-Cop (or Kocide) and Abound, alternating through the seasons. For stubborn problems on some crops you can supplement the copper with Manzate Pro-Stick.