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On competition between black night-shade (Solanum nigrum L.) and transplanted tomato (Lycopersicon esculentum Mill.)



On competition between black night-shade (Solanum nigrum L.) and transplanted tomato (Lycopersicon esculentum Mill.)



Difesa delle Piante 9(4): 359-364



In a field study at Policoro, Italy, tomato Roma was transplanted on 22nd May 1984 with between and within row plant spacings of 100 and 20 cm, resp. S. nigrum seed was sown the same day. Infestation levels of 0, 1, 3, 5 or 7 S. nigrum plant/msuperscript 2 resulted in commercial yields of 51.2, 44.8, 33.8, 29.5 and 23.5 t/ha resp. Yield was significantly reduced at infestation levels above 1 plant/msuperscript 2.

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