Browsing by Author "Cachado, J."
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- Cover cropping effect on P. ramosa parasitation in tomato under controlled conditionsPublication . Calha, I.M.; Santos, João; Amaral, Artur; Cachado, J.; Nunes, A.P.Broomrape (Phelipanche ramosa; Orobanchaceae) control in processing tomato could only be achieved with an integrated approach aiming for a synergy among cultural, physical, chemical, biological and biotechnological methods. Cover crops are cultural methods with growing expectations for reducing weed burdens. The present study was carried out to assess the potential of different cover cropping plant species to reduce parasitation of P. ramosa in tomato. A greenhouse assay was set from November 2020 to September 2021 to evaluate four cover crops, two trap crops (Linum usitanissimum and Pisum sativum), one mycorrhizal Poaceae (Lolium rigidum) and a species mixture of Fabaceae x Poaceae. The density was 1,5 g seeds per m2 in pots with14 cm diameter with soil and turf mix (2:1). Previously, seeds of P. ramosa were spread on top of soil (0,02 g, circa 3000 seeds) except in the absolute control. Four months later, cover crops were cut at soil level, and a tomato plant was planted in undisturbed soil, one per pot. A total of 20 tomato plants per treatment was observed. Three months later, roots of tomato were screened, and broomrape tubers were counted and weighed on a weekly basis. The number of broomrape tubers ranged from zero to seven per tomato plant. Until July, the maximum number of 30 parasited plants were registered in control (no cover-cropping) and the minimum of zero in the species mixture of Fabaceae x Poaceae. The other crops reduced tomato parasitation from 20 % to 63 %, compared to the control. The most effective cover cropping was the mixture of Fabaceae and Poaceae, which was well adapted for the condition of Ribatejo tomato fields in Tagus valley, Portugal. Fabaceae species are known for their great potential for broomrape control. Fabaceae combinations with Poaceae increased resilience against adverse weather conditions, an advantage to achieving efficient weed control over a long-term period.
- Estratégia de controlo do rabo-de-raposa na cultura do tomate - oportunidade de intervençãoPublication . Calha, I. M.; Amaral, A.; Santos, J.; Cachado, J.; Nunes, A. P.
- Estratégias de prevenção e controlo da planta parasita rabo-de-raposa na cultura do tomate de indústriaPublication . Romão, I.; Calha, I. M.; Amaral, A.; Santos, João; Godinho, Maria; Cachado, J.; Nunes, A. P.
- Impacto das práticas culturais na flora infestante das culturas hortoindustriais: validação por inquéritoPublication . Pinto, A. S.; Nunes, A. P.; Amaral, A.; Valério, E.; Santos, João; Cachado, J.; Godinho, Maria; Matos, S.; Calha, I. M.O aumento dos prejuízos associados a uma flora infestante e parasita é um problema real das culturas hortoindustriais da região do Vale do Tejo. Os resultados de um inquérito aos produtores confirmaram que a escolha das práticas culturais condiciona o aparecimento e o controlo dessa flora.