The effect of Vympel and Rhizostym on some indicators of vegetable pepper growth at different phases of ontogenesis

Abstract

Pepper (Capsicum annuum L.) is one of the leading vegetable crops, cultivated mainly on farms. A study was introduced to study the comparative effect of pre-sowing seed treatment with Vympel and Rhizostym on some indicators of growth of pepper of sweet vegetable variety Bogatyr at different phases of ontogenesis. According to the results of research, it was found that the treatment of seeds with Vympel and Rhizostym has a positive effect on the accumulation of raw and dry matter of vegetable pepper plants. In the phase of two true leaves, the drug Vympel outperformed the control indicators by 65.5 and 100 %, respectively. In the phase of eight true leaves, the best results on the weight of the raw material were obtained in the variant with the use of Rhizostym, which exceeded the control value by 94 %, while the weight of dry matter was better influenced by Vympel, which exceeded the control values by 109.3 %. In terms of the percentage of dry matter in the plant sample, the best effect was shown by the drug Vympel, which exceeded the control value by 16.9–21.4 % depending on the phase of development. According to the water content in the plant sample in the phase of two true leaves, Vympel showed high efficiency, which exceeded the control indicators by 56.1 %. Rhizostym contributed to an increase of 94.1 % compared to the control in the phase of eight true leaves. Studying the effect of the studied drugs on the linear growth rates of pepper vegetable variety Bogatyr, it was found that the height of the stem and root length of plants in the phase of two true leaves was better influenced by the drug Vympel, which exceeded control by 6.3 % and 61.5 %, respectively. In the phase of eight true leaves, these indicators were better influenced by the drug Rhizostym. In terms of stem diameter in the middle part of pepper plants in the flowering phase, the drug Rhizostym was highly effective, exceeding the control value by 30 %, and in the ripening phase – Vympel, which contributed to the predominance compared to the control by 26.5 %. The highest yield of vegetable peppers was found during seed treatment with Rhizostym. It also helped increase the wall thickness of pepper fruits. Therefore, plant growth regulators Vympel and Rhizostiy should be used to treat vegetable pepper seeds in order to improve growth, yield and fruit quality