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Chemical and nonchemical control of weeds in the cultivation of lemon balm for seeds

100%

Krawiec M., Borowy A., Dzida K.

Acta Scientiarum Polonorum. Hortorum Cultus

2019

tom 18

nr 5

The fight against weeds in the organic cultivation of herbal plants, both raw and for seeds, is a big challenge for growers. The paper compares the chemical (bentazon, 960 g·ha–1 and fluazifop-P-butyl, 150 g·ha–1) and nonchemical (scattering mustard seed meal in two doses 1.5 and 3.0 t·ha–1) control of weeds in the cultivation of lemon balm for seeds. Additionally, the influence of these factors on the yield of fresh herb and seeds of lemon balm and the sowing value of seeds was evaluated. The best method to control the weed infestation was to use mustard seed meal in an amount of 3.0 t∙ha–1. Scattering of mustard seed meal in that dose reduced the number and weight of weeds on average from two years of research by 52.1 and 60.2% in relation to unweeded control. Following methods were slightly less effective: bentazon and application of mustard seed meal in quantity of 1.5 t·ha–1. The largest yield of fresh lemon balm herb was collected from plots where mustard seed meal was used in an amount of 3.0 t∙ha–1. Seeds harvested from plots, on which mustard seed meal was used in a larger quantity was characterized by the lowest sowing value determined by the lowest energy and capacity of germination and the highest share of nongerminated seeds. Lowering the amount of used mustard seed meal to 1.5 t·ha–1 significantly improved their sowing value. Although this method was less effective in counteracting weeds than using larger dose, it provided comparable effects of reducing the number and weight of weeds in relation to chemical protection.

Non-chemical control of some important pests of sweet cherry

100%

Andreev R., Kurtinkova H., Baltas K.

Journal of Plant Protection Research

2008

tom 48

nr 4

503-508

Some non-chemical insecticides were tested for efficacy of control of fall webworm, Hyphantria cunea (Drury), and of cherry weevil, Rhynchites auratus (Scop.) in the laboratory and black cherry aphid, Myzus cerasi (Fabr.) under field conditions. Hendreson & Tilton formula was applied for evaluation of efficacy. NeemAzal T/S (azadirahtin) at the concentration 0.5% and Naturalis (Beauveria bassiana) used at 0.2% or 0.3% have shown the best results against black cherry aphid. Good results were also obtained with Pyrethrum FS (pyrethrin + sesame oil + soft potassium soap) used at 0.05% or 0.1%, with NeemAzal T/S at 0.3%, PreFeRal WG (Paecilomyces fumosoroseus) at 0.2% and with Naturalis at 0.1%. The effect of PreFeRal WG, applied at 0.1% was unsatisfactory. Against the fourth instar larvae of fall webworm, excellent results were noted for Pyrethrum (0.05% and 0.1%) and Naturalis (0.1% and 0.2%). Very good effects were also obtained with the BMP 123WP (Bacillus thuringiensis), used in concentration of 0.1%. NeemAzal T/S - 0.5% had still good, albeit lower, efficacy. Against the cherry weevil only Pyrethrum FS was tested. This insecticide resulted in a very good efficacy, when used at the concentration 0.1% and still satisfactory - at 0.05%.

Ograniczanie wyników

1 Acta Scientiarum Polonorum. Hortorum Cultus

1 Journal of Plant Protection Research

1 Andreev R.

1 Baltas K.

1 Borowy A.

1 Dzida K.

1 Krawiec M.

1 Kurtinkova H.

1 2019

1 2008

Wyniki wyszukiwania

Chemical and nonchemical control of weeds in the cultivation of lemon balm for seeds

Non-chemical control of some important pests of sweet cherry