I have a problem with our trees I can't identify. Affecting Plum, Greengage and cherries. Some trees are partly affected, the Black doris the entire tree. http://s1276.photobucket.com/user/oamaruordinary/media/DSCN0401_zpsuzoyxanl.jpg.html (cherry tree) The affected leaves are small and narrow. Some are just smaller and reduced in size.
annies3,
Nov 22, 6:03pm
Probably thrips, mine do get this as well but this year I have been able to control it by using spraying oil before flowering a few times also copper and they are much better I have sprayed again, just with oil since fruit has set, one plum in particular is susceptible to the thrips, the effect looks a bit like leaf curl, but we have a peach which is fine.
gsimpson,
Nov 22, 6:49pm
I sprayed the trees with copper before flowering.
This is new. I have had problems in the past with leaf curl but this looks different. With the Black doris the entire tree is affected with all the leaves small and thin.
maclad,
Nov 22, 7:34pm
It could be borer or canker or leaf curl aphis. All the above can affect part or all of the plant. The first two are hard to remedy but aphis can be sprayed. A better close up pic of leaves of all plants would be more helpful. If it is canker then there will be marks on the branches and borer may show up with sawdust and holes in the branches.
almost looks like spray damage, anyone been using hormone sprays or even roundup nearby?
gsimpson,
Nov 22, 8:45pm
No. That is not very likely.
maclad,
Nov 22, 8:53pm
It could be hormone damage but I doubt it. This is a hard one sorry I can't be more helpful
maclad,
Nov 22, 8:55pm
Some of the pics look like hormone damage but the original pic with the lumpy leaves does not
annies3,
Nov 22, 9:53pm
Copper won't fix thrips, oil will, it smothers them. I used the copper to kill off any diseases, I had an expert look at mine that is where I got the info from.
maclad,
Nov 22, 9:57pm
Thrips tend to turn the upper leaf surface silvery. Large infestations of sucking pests can cause this curling and lumpy effect
gsimpson,
Nov 22, 10:18pm
It is very dry here. Could I not be watering enough?
maclad,
Nov 22, 10:25pm
How would that affect just one branch.
annies3,
Nov 22, 10:28pm
Its dry alright, 7mls over night though, its the wind El Nino effect could you have wind damage if you are certain its not thrips,
4bes,
Jul 24, 10:02pm
My plums look the same. If you unroll the curled leaves, you'll find a mass of aphids.
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