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Gummosis problem

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franklazar26:
Iíve stumbled upon a few more issues regarding my trees. It seems that several have this gummosis issue, most start at the base of the tree and kill them from the base up. Iíve recently had it on some in the upper parts too. Is there anything that treats this? Or are my trees that develop it, goners?

Some pics of the stuff. On my VPL I peeled back some of the soft mushy bark, seems rather brown and unhealthy. I feel impending doom coming anyways.








vnomonee:
Hi frank, my grafted xie shan satsuma started doing this over the winter. i bought "gardenphos" which is a systemic fungicide (phosphorus acid) did a leaf spray made  and a soil drench over the course of the winter. so far there has not been any more gummosis from that tree and I haven't noticed it in any of my other plants. Not sure if it was already infected when I purchased it (BriteLeaf) or if it caught it from the enviornment here in NJ. Apparently its phytophthora that causes it and it starts at the roots so treat your soil. it can also enter tree wounds so make sure nothing splashes any cuts or scrapes on your trunk or anywhere you did a graft especially if its going to rain.

also what is your potting medium? does it stay wet for a long time?

pagnr:
Root diseases are generally thought to be more prevalent under unfavourable conditions.
Roots in a cold,saturated,  wet zone at the bottom of a pot could be alleviated by increasing Air filled porosity and drainage.
Repotting into a taller pots without disturbance may help.
Composted chicken manure ( also a Phosphorous source ) is said to have anti Phytophora properties.
Silica is also seen as a useful addition. Various natural minerals supply Silica, an essential plant nutrient that may be absent from Hydroponics or some pot mixes.
Composted fish fertiliser, with a high crustacean content is said to be useful. Fungi have Chitin based cell walls, as do Arthropods.
Some claim the enzymes in composted crustaceans fertiliser can be anti Fungal.
In Australia composted Eucalypt sawdust is a useful addition to pot mix for root disease suppression, above that of properly composted pine bark.

Other factors that promote root disease are root damage,  from incorrect fertiliser application rates, and excessive drying out of the pot mix between waterings.
( drying out increases the fertiliser concentration in the pot mix, more fertiliser in less water ).

franklazar26:

--- Quote from: vnomonee on August 16, 2022, 11:40:17 PM ---Hi frank, my grafted xie shan satsuma started doing this over the winter. i bought "gardenphos" which is a systemic fungicide (phosphorus acid) did a leaf spray made  and a soil drench over the course of the winter. so far there has not been any more gummosis from that tree and I haven't noticed it in any of my other plants. Not sure if it was already infected when I purchased it (BriteLeaf) or if it caught it from the enviornment here in NJ. Apparently its phytophthora that causes it and it starts at the roots so treat your soil. it can also enter tree wounds so make sure nothing splashes any cuts or scrapes on your trunk or anywhere you did a graft especially if its going to rain.

also what is your potting medium? does it stay wet for a long time?

--- End quote ---

Interesting, as itís only my briteleaf plants that are affected. Everything else is in the same potting media, made of coco chips, coco coir, and perlite with an added biochar. Iíll have to contact them and ask a little about it. Iíve had about 6-8 brite leaf rooted cuttings develop this, some even croak. Iíll be grabbing a systemic fungicide though! Thank you for the input!

franklazar26:

--- Quote from: pagnr on August 17, 2022, 06:13:32 AM ---Root diseases are generally thought to be more prevalent under unfavourable conditions.
Roots in a cold,saturated,  wet zone at the bottom of a pot could be alleviated by increasing Air filled porosity and drainage.
Repotting into a taller pots without disturbance may help.
Composted chicken manure ( also a Phosphorous source ) is said to have anti Phytophora properties.
Silica is also seen as a useful addition. Various natural minerals supply Silica, an essential plant nutrient that may be absent from Hydroponics or some pot mixes.
Composted fish fertiliser, with a high crustacean content is said to be useful. Fungi have Chitin based cell walls, as do Arthropods.
Some claim the enzymes in composted crustaceans fertiliser can be anti Fungal.
In Australia composted Eucalypt sawdust is a useful addition to pot mix for root disease suppression, above that of properly composted pine bark.

Other factors that promote root disease are root damage,  from incorrect fertiliser application rates, and excessive drying out of the pot mix between waterings.
( drying out increases the fertiliser concentration in the pot mix, more fertiliser in less water ).

--- End quote ---

Thatís some good stuff! Thank you for that info! Iím thinking Iíll try a systemic fungicide first and go from there!

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