The relationship between drought, Diplodia pinea and dieback of Pinus radiata.

1974 ◽  
Vol 3 (1) ◽  
pp. 3
Author(s):  
GC Marks ◽  
G Minko
Keyword(s):  
Pinus Radiata ◽  
Diplodia Pinea ◽  
The Relationship

Trichoderma atroviride promotes growth and enhances systemic resistance to Diplodia pinea in radiata pine (Pinus radiata) seedlings

2011 ◽  
Vol 42 (1) ◽  
pp. 75-78 ◽  
Author(s):  
T. Regliński ◽  
N. Rodenburg ◽  
J. T. Taylor ◽  
G. L. Northcott ◽  
A. Ah Chee ◽  
...  
Keyword(s):  
Pinus Radiata ◽  
Radiata Pine ◽  
Systemic Resistance ◽  
Trichoderma Atroviride ◽  
Diplodia Pinea

scholarly journals Evaluación Dasométrica De Una Plantación De Pinus Radiata D. Don En El Sector San Andrés, Guano, Ecuador

2018 ◽  
Vol 14 (15) ◽  
pp. 78
Author(s):  
Miguel Angel Guallpa Calva ◽  
Sonia Carmita Rosero Haro
Keyword(s):  
Correlation Coefficient ◽  
Pinus Radiata ◽  
Sandy Loam ◽  
Type Equation ◽  
Linear Type ◽  
Total Height ◽  
Silvicultural Treatment ◽  
San Andres ◽  
The Relationship ◽  
Total Average

There are scarce information concerning the growth and productivity of the trees of the plantation of Pinus radiata D. Don. This is usually found in the forest estate of the Haro-Maderas factory in a condition of soil with sandy loam texture, deep and moderately fast drainage, pH 6.7, fertility between low and high with the specific application of a pruning activity at the age of 5 years, and gradual monitoring every year until 8 years of age. This is considered as part of its management which constitutes a benchmark in the Tahuala sector. For this reason, this study aims to evaluate its forest mass. Circular plots of 8.92m radius were installed at an intensity of 4.33% ha-1 . This, however, is done through a systematic aligned sampling for the collection of dasometric information. The application of statistical estimators showed an altitude of 3145 masl. It reached an average total height of 12.76 m, a DAP of 15.27 cm, the total average tree-1 estimated volume of 0.16 m3 , and its projected value of 303.56 m3 ha-1 . The relationship between the DAPage variables and the average-age total height was high and significant. It has a correlation coefficient equal to 0.99, whose estimation was better with the linear type equation. It was suggested that thinning should be carried out with an intensity of 28.77%. In regards to the remaining trees, it will be very necessary to apply the silvicultural treatment of pruning.

The pathogenicity of Diplodia pinea to Pinus radiata D. Don

1969 ◽  
Vol 17 (1) ◽  
pp. 1 ◽  
Author(s):  
GC Marks ◽  
G Minko
Keyword(s):  
Pinus Radiata ◽  
Wood Quality ◽  
Field Trials ◽  
Disease Symptoms ◽  
Diplodia Pinea ◽  
North Eastern ◽  
Traumatic Resin Canals ◽  
Resin Canals ◽  
Very High ◽  
Considerable Damage

In the Pinus radiata stands of north-eastern Victoria the symptom "dead top" is common and consistently associated with the fungus Diplodia pinea. In order to resolve the pathogenic status of D. pinea, its association with disease symptoms has been studied by histological examination and tissue isolations following greenhouse and field inoculations. Malformations were associated with infection by D. pinea and although the amount of tissue killed was small, the defect induced was considerable. Damage to the leader caused the greatest loss in wood quality. The fungus attacked the pith very readily after gaining access to this tissue through injuries and via needle or cone traces. In the pith, the fungus spread slowly downwards and was protected from changes in the external environment. Injection of D. pinea spores into the pith resulted in a very high percentage of infection, and caused the malformations and other symptoms associated with attack by this fungus in the field. Histological studies showed that the fungus spread rapidly in the pith tissues, causing alterations in cambial function which produced traumatic resin canals, parenchymatous cells, and compression wood. Field trials showed that fast-growing trees were more severely affected than slower-growing ones, and the latter recovered more quickly. The fungus persisted in the infected tissues for up to 400 days.

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