The spore or spore masses may then be observed at a higher focus lying on the coverslip, and by again focusing downwards their previous relation to the now sporeless phialide-tips may be checked.

Then, a fungal spore will break off inside the tree's vascular system and move the disease up into the branches. The fungus produces toxic compounds that damage tree tissue.

Latest verticillium wilt research Peter Gladders of ADAS says that it’s too early to say whether foliar fungicides offer some control of verticillium wilt, as there isn’t any trials data on ...