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Tytuł artykułu

Weed competitiveness and herbicidal sensitivity of grafted tomatoes (Solanum lycopersicon Mill.)

Warianty tytułu
Konkurencja chwastów i wrażliwości na herbicydy szczepionych pomidorów (Solanum lycopersicon Mill.)
Języki publikacji
Field and greenhouse experiments were conducted in 2007 and 2008 to evaluate weed competitiveness and herbicidal sensitivity of grafted tomatoes. Three weed interference levels were established in the field by imposing different weeding pressures. Results indicated that grafting of tomato seedlings did not increase the ability of plants to suppress weeds over self rooted plants. Grafted tomatoes had more vigorous growth and fruit yield compared to self rooted tomatoes across all weed levels. Weeds were found to have more prominent adverse effects on tomato productivity, but had less adverse effects on plant growth. Greenhouse experiments were conducted to detect herbicidal sensitivity of grafted and self rooted tomatoes towards metribuzin and sethoxydim herbicides. The experimentsrevealed that grafted tomatoes showed a relatively higher herbicidal sensitivity than self rooted seedlings. Grafted plants probably were less able to metabolize and detoxify high herbicide rates whenever variations in plant height or dry matter accumulations were detected in the experiments. Researchers and producers should be aware of this newly observed sensitivity when designing herbicide application programs for weed management in grafted crops.
W latach 2007 i 2008 przeprowadzono polowe i szklarniowe doświadczenia w celu oceny konkurencyjności i wrażliwości na herbicydy szczepionych pomidorów. Ustalono trzy poziomy interferencji w polu poprzez stworzenie różnych presji infekcyjnych. Uzyskane wyniki wykazały, że szczepienie siewek pomidora nie powodowało wzrostu zdolności roślin do ograniczania chwastów w stosunku do samoukorzenionych roślin. Zaszczepione pomidory wykazywały silniejszy wzrost i większy plon owoców w porównaniu do samoukorzenionych roślin przy wzięciu pod uwagę różnych poziomów zachwaszczenia. Ustalono, że chwasty wykazywały wyraźniejszy szkodliwy wpływ na produktywność pomidora, lecz mniej szkodliwy wpływ na wzrost roślin. Doświadczenia szklarniowe przeprowadzono w celu określenia wrażliwości na herbicydy metribuzin i sethoxydim szczepionych i samoukorzenionych pomidorów. Jednocześnie wykazano, że szczepione pomidory miały względnie wyższą wrażliwość na herbicydy niż samoukorzenione siewki. Zaszczepione rośliny były, prawdopodobnie, mniej zdolne do metabolizowania i zapobieżenia toksyczności wysokich dawek herbicydów, tam gdzie wykryto zróżnicowanie zmienności w wysokości roślin lub akumulacji suchej masy. Badacze i producenci powinni brać pod uwagę nowo zaobserwowaną wrażliwość, gdy tworzą programy ochrony pomidora szczepionego przed chwastami.
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