I’ve been a distracted vigneron of late. Lots of things happening at home – some good, some tragic. I’ve managed to get some regular doses of sulfur and kaolin on my vines. I still have to fine tune this as I think I did not start early enough was not regular enough. I am seeing some of those black splotches on green fruit canes. So far, I think I’ve been able to keep the Powdery Mildew off my clusters, but I am seeing weird brown spots on green berries.
I am not seeing the typical, concentric PD leaf scorch. Berry shrivel has been very minimal and within normal ranges.
Any input would be appreciated.
In addition to these brown discolorations, I am seeing some patchy lignification of fruit canes:
Last year, I noted quite a bit of Glassy Winged Sharpshooters in my traps. This year, I am seeing them on canes now and then.
The only preventive measure I have taken was the application of kaolin. I planned to install a Mazzi venturi injector on the irrigation line (for imicloprid administration). But too many things kept me from getting that done.
Now, a few canes have clearly demarcated patchy lignification in a perinodal distribution:
Again, there is no significant berry loss or leaf discoloration of scorch and I am not sure whether this pattern of patchy lignification is normal or pathologic.
Has anyone had experience with this?