Hi.
At the beginning of spring 2017, when season starts we noticed a big problem on one of Meyer orchards. Leaves got yellow gradually quickly. We supported with trace elements, iron and applied %35 Metalaxyl and % 80 Fosetyl-Al in order.
Trees recovered and continue well in the summer. Then in September, the symptoms seen again and the tress died one by one, all of the orchard.
We got the soil and dead trees tested and nothing significant had been found, only some pathogens which are not the reason but the result of dead roots.
Unfortunately, we have 8000 more Meyer lemon trees on C35 rootstock in another orchard. We got afraid a lot at first but they were fine until last month. This month they showed the same symptoms and I am afraid the result will be same. This time we support with zinc and manganese because C35 is susceptible to them but I have no hope.
When you pull out a dead tree, you can see there is a very limited root development. It is obvious that the top part was not successful to support roots.
And rootstock-bud union connection shows a swelling on bud part.
At final conclusion we think it is a rootstock - scion incompatibility.
I would like to hear your experiences with C35 and meyer or other lemons.
Have a nice day.