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Members of Araucaria occur across the South Pacific, especially concentrated in New Caledonia (about 700 km or 430 mi due north of Norfolk Island), where 13 closely related species of similar appearance are found. It is sometimes called a star pine, Polynesian pine, triangle tree or living Christmas tree, due to its symmetrical shape as a sapling.
This is referred to as the phytophagous phase of the nematode, and it results in pine wilt disease. Water transport in the tissues of the infested tree is disrupted, and the disease can manifest within as little as a few weeks. Signs include browning of the needles or yellowing of the leaves, and the tree may die within two to three months.
Pine-pine gall rust, also known as western gall rust, is a fungal disease of pine trees. It is caused by Endocronartium harknessii (asexual name is Peridermium harknessii ), an autoecious , endocyclic , rust fungus that grows in the vascular cambium of the host. [ 1 ]
Norfolk Island Pine Plant Basic Info: Common Name: Norfolk Island pine, Norfolk pine, Australian Pine. Botanical Name: Araucaria heterophylla. Plant Family: Araucariaceae. Type of Plant: Tree ...
Norfolk Island Pine Plant Basic Info: Common Name: Norfolk Island pine, Norfolk pine, Australian Pine. Botanical Name: Araucaria heterophylla. Plant Family: Araucariaceae. Type of Plant ...
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It has been introduced into Japan and China, [10] where it has become a troubling disease of Japanese red pines (Pinus densiflora) and black pines (Pinus thunbergii). Over 46 million cubic meters of trees have been lost alone in Japan over a 50-year period. [10] It is spread among conifers by pine sawyer beetles (Monochamus spp). The nematodes ...
Cyclaneusma is one of the most important diseases of forests in New Zealand. A study set up in 1977 measured the disease severity of a tree stand over a six-year period. Healthy trees were shown to exhibit 100m^3/ha more stem volume than infected. [4] Projected revenue loss of lumber from diseased trees was expected to be $3200/ha.