Effect of Some Soil Herbicides on the Vegetative Habits of Almond Seedlings Prunus dulcis L. | ВЛИЯНИЕ НА НЯКОИ ПОЧВЕНИ ХЕРБИЦИДИ ВЪРХУ ВЕГЕТАТИВНИТЕ ПРОЯВИ НА СЕМЕННИ ПОДЛОЖКИ ОТ БАДЕМ Prunus dulcis L.
2014
Rankova, Z., Institute of Fruit Growing, Plovdiv (Bulgaria) | Tityanov, M., Sumi Agro Bulgaria Ltd. Sofia (Bulgaria)
A study on the effect of applying the soil herbicides metolachlor + oxyfluorfen Metofen and flumioxazin Pledge 50 WP on the vegetative habits of almond seedling rootstocks was carried out in the period 2010 – 2012 at the Fruit Growing Institute – Plovdiv. Treatment with the herbicides was applied in the second half of March, before the beginning of vegetation, immediately after planting the apricot seeds. The following variants were set: 1 Control untreated, hand-weeded; 2 Metofen – 120 ml/da; 3 Metofen – 240 ml/da; 4 Pledge 50 WP – 8.0 g/da; 5 Pledge 50 WP – 20.0 g/da. For evaluating the efficacy of the applied herbicides during the vegetation period, weed infestation in the separate variants was reported in dynamics by the quantity-weight method, every 30th day after the date of treatment until the end of the herbicide post-effect. In August 15 – 20 August the rootstocks were graded for quality, reporting the following biometric characteristics: stem height cm and thickness at the place of grafting mm. The results give reason to assume that high doses of active substances applied suppress vegetative symptoms of seedling rootstocks of almond. Depressing influence of the active substances is well manifested on the indicator stem height and relatively weak in thickness at the place of grafting. Plants from herbicide variants have a thickness at the place of grafting 6.2 – 8.7 mm, making them suitable for grafting in the year of sowing of seeds.
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