Browsing by Author "Bivol, Alexei"

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    THE ASSOCIATIVE AND INVASIVE IMPACT CAUSED BY COMPLEXES OF PARASITIC INSECTS AND NEMATODES WITH THE APPLICATION OF CHEMICAL MANAGEMENT IN MAIZE PLANTATIONS UNDER THE CONDITIONS OF THE REPUBLIC OF MOLDOVA
    (CEP USM, 2022-09-29) Iurcu-Străistaru, Elena; Bivol, Alexei; Meleca, Anatol; Criucikov, Oleg; Rusu, Ștefan; Cîrlig, Natalia; Bivol, Elizaveta
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    CERCETĂRI HELMINTOLOGICE CU IMPACT INVAZIV STABILITE LA CULTURA DE MAZĂRE (PISUM SATIVUM L.) ÎN CONDIȚIILE DE MEDIU ALE REPUBLICII MOLDOVA
    (CEP USM, 2024) Iurcu-Străistaru, Elena; Toderaş, Ion; Bivol, Alexei; Rusu, Ştefan; Sasanelli, Nicola; Rusu, Viorelia; Gliga, Olesea; Gologan, Ion
    One important factor in increasing the productivity and quality of peas (Pisum sativum L.) grown in the conditions of the Republic of Moldova is the phytosanitary control of parasitic helminthological fauna. The investigations were carried out in four administrative districts of the central areas, covering twelve pea sectors from various regions specialized in the cultivation of fabaceous plants. As a result of the helminthological protection investigations in peas, the parasitic degree was established for the first time, with comparative indices of number density ranging from 15 to 250 individuals per 100g of soil, and an abundance of 7–25% in spring. The frequency indices of the attack degree and extensiveness of helminthological affections showed more advanced values (5–30%) in the summer, varying across plantation areas. The structure of the nematode parasite complexes was determined, consisting of eight genera, including six families and one order, classified according to their trophic specialization. There was a predominance of endoparasite and semiendoparasite species from the Heteroderidae, Tylenchidae, and Hoplolaimidae families.
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    EFFECT OF PLANT PARASITIC NEMATODES ON OLIVE PLANTLETS OF XYLELLA-RESISTANT CULTIVAR FAVOLOSA
    (CEP USM, 2024) Sasanelli, Nicola; Pasqua, Veronico; Dongiovanni, Crescenza; Toderash, Ion; Rusu, Ştefan; Bivol, Alexei; Iurcu-Străistaru, Elena; D'addabbo, T.
    Two experiments were carried out to verify the susceptibility of olive plantlets of the Xylella fastidiosa - resistant cultivar Favolosa to the root-knot nematode Meloidogyne javanica and the root lesion nematode Pratylenchus vulnus. In the first experiment the relationship between the nematode population density and the olive plants growth was assessed. Plant growth parameters, main shoot length and diameter and number of nodes, were analysed by the SeinFit program in order to calculate the tolerance limit (T) to the nematode attack and the minimum relative per cent growth (m) of the plants. In the second trial, the reaction of olive plantlets to P. vulnus was assessed by measuring the growth parameters after P. vulnus inoculations (200 juveniles/plant). The susceptibility to the nematode was evaluated on the base of the reproduction factor r = Pf/Pi according to r value: NH (non host) = Pf300 nematodes/plant. For each trial ten replications were considered. Both trials indicated a susceptibility of the cv. Favolosa to both phytoparasitic nematodes despite of its resistance to Xylella fastidiosa.
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    RESEARCH ON THE INVASIVE IMPACT OF HARMFUL INSECT COMPLEXES ASSOCIATED WITH PARASITIC NEMATODES AND PATHOGENIC VIRUS VECTORS IN PRODUCTIVE PLUM ORCHARDS
    (CEP USM, 2022-09-29) Bivol, Alexei; Toderaş, Ion; Mager, Maria; Bădărău, Sergiu; Iurcu-Străistaru, Elena; Rusu, Ștefan; Bivol, Elizaveta
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    SUSTAINABLE AGRICULTURE IN THE LIGHT OF CLIMATE CHANGE: EFFECT OF TEMPERATURES AND EXPOSURE TIMES ON THE MORTALITY OF THE DAGGER NEMATODE XIPHINEMA INDEX
    (CEP USM, 2023) Sasanelli, Nicola; Toderas, Ion; Iurcu-Straistaru, Elena; Rusu, Ștefan; Bivol, Alexei; Gliga, O.; D’Addabo, T.
    The gradual rising of average temperatures due to climate change are increasing the problem caused by phytoparasitic nematodes. To predict the effect of soil solarization on Xiphinema index, an experiment was undertaken to investigate the effect of different temperatures (from 25 to 42.5 °C) and exposure times (from 2 up to 2,048 hrs) on the mortality of the nematode. Surviving nematodes were expressed as percentages of those surviving at 25 °C. The differences to 100 were considered as mortality percentages. To kill 50% of nematode population were necessary 180, 34, 4.7 and 2.5 hours at 35, 37.5, 40 and 42.5 °C, respectively. Data fitted the model Pt=Po10- Δt/(q+mT) reported in literature.