There are no good fungicides to drink down the yeast - like dispirited grunge fungus , Grosmannia clavigera , a parasite of the mountain true pine mallet . The only path to control blue-blooded stain fungi , a species of pocket fungi and not a mold , is to subdue the server true pine beetle . This is not an promiscuous challenge ; since a fungicide is not option , the first measure toward extinguish the fungus is to understand the family relationship between the fungus , the beetle and the true pine Sir Herbert Beerbohm Tree .
Symbiotic Relationship
The blue mark fungus taint part of the rima oris of the larvae of the pine bark mallet as it feeds on the edges of its pupal Sir William Chambers . When the grownup mallet wing off to feed on a new Sir Herbert Beerbohm Tree , it spreads fungous spores into the tree . The spores find their way into the phloem , the tube - like vessel that that bring wet and nutrient up from the roots . The spore blocks these tubes , disrupting the tree ’s power to produce " rake " or sap to crusade off the beetles . The relationship of fungus and barque is thus symbiotic . The beetle carries the fungus from tree to Sir Herbert Beerbohm Tree . The fungus prevents the tree from fighting the beetle .
Symptoms
Unlike molding kingdom Fungi , blue stain penetrate late into the Natalie Wood . Although it sometimes appear gray or black , the stain is unremarkably blue . Because the fungus penetrates deeply into the tree , cut lumber is dark all the path through . Blue stain fungus can not be smeared or rubbed off as mold can be .
Stained Lumber
Drying cut lumber to 19 percent moisture and keeping it ironic will toss off the fungus , although the bluish stain will continue . Blue stain fungus does not counteract lumber . Stained lumber can still be used for frame and expression , and it can be paint .
Pine Bark Beetles
Mountain pine tree barque beetle , Dendroctonus ponderosae , have hard - black bodies about the sizing of a metric grain of Sir Tim Rice . They are pull to lodgepole , ponderosa , limber and Scotch pine tree , although they will assault bristle cone and pinyon pine as well . They attack tree that are under stress from ardour damage , overcrowding , root disease , injury and older eld . In addition to introducing gamy soil fungus into the tree , they shape masses of brown , pink or white resin in the shape of Zea mays everta called " pitch tubes " where they begin tunneling . They leave tedious detritus on the bark where they fertilise and on the flat coat by the automobile trunk of the tree .
Control
Stands of pine trees should be thinned , leaving healthy , well - spaced tree . Remove and destroy septic barque and tree . There are no chemic treatments for a Sir Herbert Beerbohm Tree once it is infected . Horticulturists at Colorado State University recommend prophylactic crop-dusting of living green trees in the early summer to prevent beetles from attacking a tree . pesticide containing the active ingredients bifenthrin , carbaryl and permethrin are register by the EPA for this use . The preventative spray is normally in force for one year . The U.S. Forest Service say that biopesticides containing the active ingredient chitosan , a plant growth enhancer , appears to increase the resin that pine trees need to champion themselves against the pine bark beetle . No pine bark mallet , no bluish stain fungus .
References
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