We have an established Wisteria, approx 6 years old.... 4 main trunks of 1-2 inches diameter......all flowering lovely this spring 'except one' !......it seems completly dead ! flowers tried to bloom but failed, other 3 branches completly normal with lovely blooms, how can this be ? I have looked for wisteria scale and brown scale = no trace........ Should we saw off this trunk incase it spreads to other branches ? What can we look for to rectify this problem ? Thank you so much for any help Regards Mary Goggin
These links will help you with more information.