n Southern African Forestry Journal - Survival and growth of Pinus patula at two years in response to harvest residue and pest management, in Mpumalanga, South Africa : scientific paper
|Article Title||Survival and growth of Pinus patula at two years in response to harvest residue and pest management, in Mpumalanga, South Africa : scientific paper|
|© Publisher:||South African Institute of Forestry (SAIF)|
|Journal||Southern African Forestry Journal|
|Author||Carol Rolando and Ross Allan|
|Publication Date||Mar 2004|
|Pages||19 - 26|
|Keyword(s)||Fungicide, Harvesting residues, Insecticide and Regeneration|
Previous research has indicated that the presence of harvesting residues, post-planting temperature and rainfall, and insect pests and diseases, are among the main causes of mortality during re-establishment of <I>Pinus patula</I> stands. The main objectives of this work were to confirm previous observations on the effects of these factors on initial survival and growth of <I>P. patula</I> seedlings. Three harvest residue management treatments (burning, harvesting residues left <I>in situ</I> or removed) and four pest management treatments applied at planting (fungicide, insecticide, fungicide and insecticide, and a control, where no pesticides were used) were tested in combination with each other. For the first two years after planting, there was a significant effect of harvest residue and pest management on survival. At two years, survival in the burned treatment was 59 %, possibly due to the presence of <I>Rhizina undulata</I>. Where the harvest residues were not burned, the survival was 88 %. Application of a fungicide and insecticide at planting improved survival in all harvest residue treatments, especially the burned treatment. Tree growth was the best where both a fungicide and insecticide had been applied at planting, followed by the individual application of either a fungicide or insecticide, with the poorest growth occurring in the control treatment.
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