Should I spray fungicide on baby mangos for powdery mildew?

[BonsaiBeast]

Tiny mangos have set, but there's powdery mildew very near.

I didn't spray the tree at all this year, hence the powder mildew issue.

Is it too late to spray? Would it be beneficial, and possibly save the fruits?

[simon_grow]

What variety is that? Some varieties seem better able to hold fruit even with PM on the blooms and other varieties like Lemon Zest seem to have issues setting full sized fruit when there’s PM. I think Har is the best person to answer this question. I’ve personally sprayed newly opened blooms with a systemic fungicide, Abound, and as far as I’m aware, there were no issues.

I’ve also read about the use of baking soda to inhibit PM growth. I use baking soda water to inhibit Fungal growth on my indoor wheatgrass cultures. I use about 1 tablespoon per gallon. I’ve never tried it on Mango though.

Simon

[BonsaiBeast]

Hi again Simon,

Hopefully your trees are withstanding our prolonged cold snap.

The tree is an Alphonso, hence the susceptibility to PM.

[simon_grow]

Alphonso definitely has some PM issues grown in San Diego and the flavor of the fruit is also not as good as those grown in India but who knows, the fruit I harvested from my tree were on a small tree and it was on Florida Turpentine rootstock so it wasn’t very healthy.

If I recall correctly, it’s best to spray before blooms open and then again after Fruit set but it depends what you’re using. Baking soda water is pretty benign so you may want to try it on half the tree.

An orchard type Sulfur  spray may also work but I don’t know if it will inhibit Fruit set if you spray on open blooms.

Simon

[Squam256]

I’ve personally sprayed newly opened blooms with a systemic fungicide, Abound, and as far as I’m aware, there were no issues.

That it a pretty expensive way to control powdery mildew.

[wslau]

I’ve personally sprayed newly opened blooms with a systemic fungicide, Abound, and as far as I’m aware, there were no issues.

That it a pretty expensive way to control powdery mildew.

$200/gallon for Abound... Tell me about it....I went in with some friends...but I haven't used it yet because the cheaper Southern Ag wettable sulfur fungicide has been doing its job.