39+ Pine Tree Diseases Brown Needles. Pine trees should maintain their distinct green color throughout the year. Brown spot needle blight (mycosphaerella dearnessii, syn.
It also favors the north side of the plant which is more humid. Cyclaneusma (needle cast) is a fungal disease that is a part of the phylum, ascomycota. Inspect your pine tree's browning, falling needles to look for small white speckles or flecks to detect spider mites.
This pine tree disease is characterized by stunted, brown new growth in the spring, resin drops forming on the stunted growth and entire branches that have died.
Infection is typically most severe in the successive years of severe needle infection can result in tree death. Later they will turn brown, either completely or in bands. Spider mites may also leave to treat your pine tree for this fungal disease, spray the entire pine tree with a fungicide during the third week in april and again in the second week in may. Leader wilted or dead 9 white pine weevil.