UNDERSTANDING THE LARCH DISEASE

It’s deadly to Larch trees once infected. Water droplets are the key factor in the transmission since it carries the spores of P. ramorum from a tree to others. This makes the rainy season the most effective season for the spread of the disease. The transmission also involves wind direction, air temperature, humidity, precipitation, terrain slopes, surface runoff, groundcovers, and human and animal activities.

Detection Method

The pear submerged in the adjacent watercourse is the indication of the presence of Phytophthora oomycota in the collected run-off water from the higher area. If the pear shows signs of infection, the pear will be carried to the lab to identify the presence of P. ramorum