Height growth characteristics of one-year-old pedunculate oaks on regeneration areas with and without fungicide protection against oak powdery mildew (Microsphaera alphitoides Griff. et Maubl.)
Height growth characteristics of one-year-old pedunculate oaks were studied during three calendar years on comparative regeneration areas both with and without fungicide protection against oak powdery mildew (Microsphaera alphitoides Griff. et Maubl.). Three fungicides were used for the che...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | srp |
| Published: |
Faculty of Forestry, Belgrade
2013-01-01
|
| Series: | Glasnik Šumarskog Fakulteta: Univerzitet u Beogradu |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0353-4537/2013/0353-45371300004P.pdf |
| Summary: | Height growth characteristics of one-year-old pedunculate oaks were studied
during three calendar years on comparative regeneration areas both with and
without fungicide protection against oak powdery mildew (Microsphaera
alphitoides Griff. et Maubl.). Three fungicides were used for the chemical
protection of one-year-old pedunculate oaks: Microthiol special, Stroby DF
and Anvil. The experiments were located in different site and stand
conditions, and the growing seasons in which pedunculate oak seedlings were
established were characterized by different precipitation sums and higher air
temperatures when compared to multiannual average. The study sample included
1126 plants, and their shoot lengths were measured at the end of the growing
season. In the analyzed sample, the second growth stage was recorded on
92.3%-100% of the treated plants and on 69.5%-100% of the untreated plants,
the third growth stage was recorded on 52.6%-87% of the treated plants and on
42.1%-82% of the untreated plants, and the fourth growth stage was observed
on 0%-37% of the treated plants and on 1.1-29% of the untreated plants. In
the analyzed sample, the mean heights of one-year-old pedun-culate oaks were
greater on the areas with fungicide protection, but the differences in the
percentages of polycyclic growth and the differences in average lengths of
individual flushes were not always statistically significant, when compared
to the areas without protection, especially after the first stage. The study
shows that the dominant effect on the percentage of the second, the third and
the fourth stages and on their mean lengths was exerted by site and stand
conditions, and that the effects of fungicide protection should be analyzed
taking into account the polycyclism of pedunculate oak, i.e. the
characteristics of polycyclic growth, which are the resultant of all the
effects. In the studied conditions, the fifth stage of growth was recorded in
five plants. |
|---|---|
| ISSN: | 0353-4537 2217-8600 |