Got a couple new jujubes that were really coming out well. Now the new leaves are turning black and not forming. It has been wet. Gonna spray my fruit trees with malathion, captan, and spectracide - should i hit the jujubes too?
How wet is wet? Roots suffocating?
Wet - 15 inches rain in the last 40 days. That was the only answer I could come up with. None of the other fruit trees showing any signs of stress. My first jujube trees - really dont know much about them
I think I’ve seen that kind of thing in the spring sometimes. It sometimes affects the new growth a bit, but they seem to get through it fine. Could be related to all the rain, though I think I remember @jujubemulberry having the same issue and he probably doesn’t get much rain in Vegas.
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The problem is caused by overwatering.
What happens in this case?
The roots suffocate due to a lack of oxygen, impairing nutrient absorption.
The grape leaves begin to show signs of water stress, such as:
Blackening of the tips.
Wilting or shrinking of new leaves.
Slowing growth. I tried this and lost two apricot and avocado trees because I was overwatering them. 
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it happens to some of our jujus too. Several rootstock present with that.
Sihong and hj if remember it right also presented with it but they recover on subsequent growth without having to spray.
i wish i knew the reason behind it, and also wish knew how jujus recover, but just happy that the species bounces back from symptoms/maladies
forgot to add-- from our experience in vegas conditions, there are 4 things that result in dieback or death:
1)borderline water deprivation will result in die back, but will leaf out from lower nodes if watered in the nick of time, and of course prolonged water deprivation will kill the entire tree, including rootstock
2)an intense freeze can result in die back of relatively thin stems, but may leaf out from lower nodes( hopefully from above the graft junction)
3) cicada slitting of stems can result in death of stems(dieback of stem segments directly above/distal to the slits)
4) witch’s broom symptoms( of course i dont have proof that they are in fact witch’s broom) will cause die-back. Often a rootstock issue. Sometimes makes me think some rootstock imported to usa from a long time ago were already afflicted as imports and merely sustained by the resistant cultivars grafted to them.Symptoms present as chlorotic and runty foliage/stems which are susceptible to dieback(especially after winter).
we intend post video of juju maladies, just couldn’t collate them soon enough…
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