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595.792:591.5:59.08 (1) |
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General zoology (264) |
SM ISO690:2012 GAVRILITSA, Lidia. Interspecific competition of Trichogramma sp. at its mass rearing. In: Oltenia - studii si comunicari stiintele naturii, 2016, nr. 1(32), pp. 71-76. ISSN 1454-6914. |
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Oltenia - studii si comunicari stiintele naturii | ||||||
Numărul 1(32) / 2016 / ISSN 1454-6914 | ||||||
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CZU: 595.792:591.5:59.08 | ||||||
Pag. 71-76 | ||||||
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As a result of the laboratory experiments, it has been established that along the 4 generations in mixed populations of T. evanescens Westw. and T. pintoi Voeg., gradual substitution of T. evanescens by T. pintoi occurs. The mechanism of interspecific competition on grain moth eggs was established. In the field of cereal, technical and vegetable crops, T. evanescens is dominant species (up to 95-99%). T. pintoi represents a laboratory population, the preferred host of which is Siotroga cerealella Ol. In the presence of the two species of Trichogramma in the biotope, their quantitative ratio depends on the specific climatic conditions and resource of eggs of the preferred host Biological indices for T. pintoi are higher than those of T. evanescens. Therefore, in the laboratory conditions we substitute T. evanescens by T. pintoi, but in the field it is the opposite. |
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Cuvinte-cheie biological indices, prolificacy, Pests, Trichogramma, Competition, biological efficacy, indicii biologici, prolificitatea, gazdă, Trichogramma, concurenţă, eficacitatea biologică |
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