Horticultura Brasileira (2004) 22, 602-606

Adriano Stephan Nascente, Welington Pereira and Maria Alice Medeiros (2004)
Interferência das plantas daninhas na cultura do tomate para processamento
[Weed interference in processing tomato crops]
Horticultura Brasileira 22 (3), 602-606
Abstract: Weed control efficiency depends on the information about its interference on the crops. The interference of weed on tomato plants of a processing variety, transplanted directly into the field was evaluated. The field experiment was carried out, in a randomized block design with three replications, at Embrapa Hortaliças in Brasília, Brazil. Plots were laid out with increasing periods of time in the presence or absence of weeds. In the first case, plots remained under weed interference from seedling stage until the following periods (days) of the tomato life cycle: 1-28, 1-35, 1-49, 1-63, 1-77 and 1-91(whole cycle, harvest). After these periods the weeds grew freely until harvesting time. In the second case, plots were weeded from seedling stage until the previously described periods. After these periods weeds were removed by hand through the rest of the tomato cycle. Among 24 of the most frequent weed species, Bidens pilosa, Brachiaria plantaginea, Nicandra physalodes and Oxalis latifolia presented higher dry matter accumulation. Tomato production was reduced by 75.5% and the critical period of interference occurred from the 33^th to the 76^th day after transplanting.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): Maria Alice de Medeiros

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
damage/losses/economics

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bidens pilosa (weed)	Tomato (Solanum lycopersicum)	Brazil (south)
	Oxalis latifolia (weed)	Tomato (Solanum lycopersicum)	Brazil (south)
	Nicandra physalodes (weed)	Tomato (Solanum lycopersicum)	Brazil (south)
	Urochloa plantaginea (weed)	Tomato (Solanum lycopersicum)	Brazil (south)