2. Articole

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Author: search.filters.author.Stîngaci, Aurelia

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    Beneficiile fenomenelor sinergice în protecția plantelor cu aplicarea preparatelor biologice
    (CEP USM, 2024) Voloșciuc, Leonid; Șcerbacova, Tatiana; Stîngaci, Aurelia; Pînzaru, Boris; Samoilova, Anna; Harciuc, Oleg; Zavtoni, Pantelimon; Lungu, Andrei; Crucean, Ștefan; Curiev, Loredana; Chistol, Marela
    The biological protection of plants through various ecological approaches, the significant diversity of the means used (entomophagous organisms, biological preparations, biologically active substances) and their high biological and economic effectiveness, managed to attract substantial attention and gained a high degree of recognition both among the specialists of highly qualified, as well as agricultural producers, regardless of the form of ownership. The effectiveness of applied biological approaches and methods is also increased against the background of the increasing impact of pesticide media and the need to solve ecological problems. On the path to increasing economic efficiency, we have established the benefits of the simultaneous use of two or more biological means.
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    APLICAREA BACTERIILOR ENTOMOPATOGENE BACILLUS THURINGIENSIS, VAR.THURINGIENSIS ȘI FP-09 CONTRA LEPTINOTARSA DECEMLINEATA LA CULTURA CARTOFULUI
    (CEP USM, 2024) Zavtoni, Pantelimon; Voloşciuc, Leonid; Stîngaci, Aurelia
    Data were obtained on the application of the entomopathogenic bacterium Bacillus thuringiensis in synergy with FP-09 for the control of Colorado potato beetle on the potato variety Marabel. The action of entomopathogenic bacteria in combination with FP-09 was determined in the control of Colorado potato beetle larvae stages I and III of the second generation Colorado potato beetle (Leptinotarsa decemlineata) under field conditions on potato crop of the variety «Marabel», where the average biological efficacy of Bacillus thuringiensis 108+ FP-09 was 75.9%. The first and third instar larvae control action was determined with FP-09, where the biological efficacy in controlling larvae of Leptinotarsa decemlineata was on average 37.8%.
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    EFICACITATEA TRATĂRII PLANTELOR LA CARTOF CU SUSPENSII DE BACTERII ENTOMOPATOGENE ÎN SINERGIE CU DERIVAȚI AI ACIDULUI PARA-AMINOBENZOIC
    (CEP USM, 2023) Zavtony, Panteleimon; Stîngaci, Aurelia; Șcerbacova, Tatiana; Samoilova, Anna; Goncharuk, Violetta; Lisouskaya, Maria; Mihalichiuk, Al.
    Researchers from the Republic of Moldova jointly with those from the Republic of Belarus have conducted studies on the growing conditions in 2022 for the "Riviera" potato variety, assessing the influence of the consequences of unfavorable climatic factors on the formation of the photosynthetic potential and productivity of plants, the quantity and quality of the harvest. Thus, after the second decade of May 2022, at the USM's IGFPP potato lot, experiments were mounted according to the scheme: treatment with para-aminobenzoic acid (PABA) derivatives 10-2,10-4, 10-6 in complex with Bacillus thuringhiensis cousin. thuringhiensis (1.5x109UCF/ml) and control – water sprinkling in the variants of experiences. Infurrow and foliar treatments were applied to potatoes with para-aminobenzoic acid (PABA) derivatives 10-2, 10-4, 10-6 mixed with Bacillus thurigiensis var. thuringiensis. The biological activity of the derivatives of para-aminobenzoic acid (PABA)10-2, 10-4, 10-6 mol/l was determined in a mixture with Bacillus thuringhiensis var. thuringhiensis (1.5x109UCF/ml) in the experimental batch of potato for the development of biological plant protection products.
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    REOMOLOGAREA PREPARATELOR BIOLOGICE - CALE SIGURĂ DE SOLUȚIONARE A PROBLEMELOR DE PROTECȚIE A PLANTELOR PENTRU AGRICULTURA CONVENȚIONALĂ ȘI ECOLOGICĂ
    (CEP USM, 2023) Voloșciuc, Leonid; Șcerbacova, Tatiana; Pînzaru, Boris; Stîngaci, Aurelia; Zavtoni, Panteleimon; Lungu, A.; Crucean, Ștefan
    Large scale implementation of microbiological preparations ensures combat not only of the noxious insects but also of pathogen agents which cannot be efficiently combated by other means of biological control. The high efficiency of viral, bacterial and mycotic preparations for combating harmful insects was demonstrated in the main groups of agricultural crops which, being applied in optimal conditions against the corresponding phases. In the report the last performances in elaboration of the biotechnologies for production of the microbiological preparations, and improvement of their application technologies in the system for integrated plant protection of different groups of crops and determination of their place in these systems are much discussed. This report presents the results of state registration of 4 preparations (1 viral, 1 bacterial and 2 fungal) for combating of pest insects and phytopathogen agents.
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    STUDIU EFICACITĂȚII COMPLEXE AL AGENȚILOR BIOLOGICI LA MĂR ȘI CARTOF LA TEMPERATURI RIDICATE
    (CEP USM, 2023) Stîngaci, Aurelia; Zavtony, Panteleimon; Șcerbacova, Tatiana; Samoilova, Anna; Goncharuk, Violetta; Lisouskaya, Maria; Mihalichiuk, Al.
    Products of microbial origin in combination with para-aminobenzoic acid (PABA) derivatives, can be the basis for organic farming and plant resistance to unfavorable environmental factors inducing, as well as for the crop yield increasing. The article presents the results of the study of efficiency of fruit-cultures and potato plantations treatment with aqueous suspensions of entomopathogenic bacteria Bacillus thuringiensis subsp. kurstaki and Bacillus thuringiensis var. thuringiensis with addition of para-aminobenzoic acid derivatives solutions in concentrations 10-2, 10-4, 10-6 mol/l. An increase in the average weight of fruits and tubers and a reduction in disease and insect damage were observed in all variants of the experiment compared to the control. The studied derivatives exhibited higher biological activity at the lower concentration than PABA. The best trial was treatment with a mixture of Bacillus thuringiensis subsp. kurstaki with the addition of an aqueous solution of PABA at concentrations of 10-4 and 10-6 mol/l. It was shown that the use of Bacillus spp. with the addition of the para-aminobenzoic acid derivatives solutions, leads to an improvement in the functional state of plants, contributing to the activation of the active resistance mechanisms to the action of the stress factors. The results obtained demonstrate the possibility of using entomopathogenic bacteria in a tank mixture with PABA for the creation of biological preparations as alternatives to pesticides and the development of biological methods of plant protection.