Variation in susceptibility to pitch canker disease, caused by Fusarium circinatum , in native stands of Pinus muricata
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چکیده
Two hundred Pinus muricata trees, located within a native forest near Monterey, California, were inoculated with the pitch canker pathogen. Treated branches were removed 10–13 weeks following the initial inoculation, and the lengths of the lesions that developed at each of the inoculation sites were measured. Results indicated that bishop pine exhibits a wide range of variation in susceptibility to pitch canker disease. Of the trees that received only one inoculation, 27% showed almost no lesion development, indicating that they were relatively resistant to the pathogen, while others had significantly longer lesions and thus were more susceptible. Clonal propagation and seed collection from resistant individuals may offer useful strategies for disease management in the future.
منابع مشابه
Rates of pitch canker induced seedling mortality among Pinus radiata families varying in levels of genetic resistance to Gibberella circinata (anamorph Fusarium circinatum)
Pitch canker, caused by Gibberella circinata Nirenberg & O’Donnell, is a problem for pines in both native and planted stands. The aerial phase of the disease results in shoot and canopy dieback, whereas soil or seedborne inoculum can cause damping off of emerging seedlings. Based on the extent of lesion development on inoculated shoots, families of Pinus radiata have been shown to differ signif...
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