Annona (soursop, atemoya, etc) pest, nutrition and other issues

[skhan]

We have a decent amount of people interested in annonas on the forum so I thought we should start a thread to help identify problems.

I'll go first.
My seedlings fruiting soursop has these brown fuzzy looking things on the underside of the leaves.







Tree seems okay and I don't notice ants crawling up the trunk

[Frog Valley Farm]

We have so much Sugar Apple fruit right now all ripening at once from 60 or so 4 yo trees.  I know compost tea will put black spots on fruit.  I sprayed Biodynamic Preparation 500 in June being cautious not to spray anywhere near the Anona. It still caused most of the fruit to get black spots I guess the biology moves through out the system.  Thankfully we don’t plan to start selling any fruit for 3 years, so I can afford to f#*%$ up. Thankfully No real issues here.  I am starting a couple hundred of the chewy, easy peel SA to intercrop with the Mangos since we have found SA and Attemoya do not need any supplemental water here and at our commercial location to produce good crops.  I love chewy SA as much as top tier Mangos.

[skhan]

Apparently my phone has a macro lens so I though I'd snap some more photos of the soursop leaves.

I know there's leaf hoppers, anything else though?

[achetadomestica]

I had a few hot pepper plants and some seedling jaboticabas have the
white under the leaves. I assumed it was white fly eggs? I saw a video
about Castile soap and gave it a try. One of the pepper plants was down to
a couple leaves that were covered with the white underneath. Now the plant is
putting out new leaves and even has peppers. I am not sure how big your Soursop
tree is and if you can spray it down?

https://www.walmart.com/ip/Dr-Bronner-s-Pure-Castile-Soaps-Unscented-16-Fl-Oz/28654159?selected=true