Results 21 to 30 of about 661 (117)

Densidade e características morfológicas de plantas de picão-preto na previsão de perdas de rendimento de grãos de soja por interferência Density and morphological plant characteristics of beggarticks in predicting soybean grain yield losses due to interference

open access: yesPlanta Daninha, 2002
A utilização de sistemas para manejo integrado de plantas daninhas depende da habilidade em se prever o impacto da infestação de plantas daninhas no potencial de rendimento de grãos da cultura.
N.G. Fleck   +3 more
doaj   +1 more source

Nível de dano econômico como critério para controle de picão-preto em soja Threshold level as a criterion for beggartick control in soybeans

open access: yesPlanta Daninha, 2003
A adoção do conceito de nível de dano econômico (NDE) no manejo de plantas daninhas avalia suas populações de modo que medidas de controle sejam implementadas somente quando as infestações superarem os NDEs.
M.A. Rizzardi   +2 more
doaj   +1 more source

Períodos de interferência de plantas daninhas na cultura do girassol Interference periods of weeds in sunflower crop

open access: yesPlanta Daninha, 2004
Dois experimentos foram conduzidos na Embrapa Soja, Londrina-PR, com o objetivo de avaliar os efeitos de diferentes períodos de interferência de plantas daninhas sobre o rendimento de óleo e a produtividade da cultura do girassol.
A.M. Brighenti   +5 more
doaj   +1 more source

Identificação de biótipos de Bidens spp. resistentes aos inibidores da ALS através de teste germinativo Identification of Bidens spp. biotypes resistant to ALS-inhibiting herbicides through germinative test

open access: yesPlanta Daninha, 2004
A presença de biótipos de Bidens pilosa e B. subalternans resistentes aos herbicidas inibidores da ALS nas lavouras de soja tem sido constatada em diversos locais do país. Este trabalho teve por objetivo desenvolver uma metodologia prática de detecção de
S.J.P. Carvalho   +4 more
doaj   +1 more source

Phytosociological aspects and weed management using cover crops on organic conilon coffee plantations /
Aspectos fitossociológicos e manejo de plantas espontâneas utilizando espécies de cobertura em cafeeiro Conilon orgânico

open access: yesSemina: Ciências Agrárias, 2010
Weeds can bring benefits to agriculture, but when incorrectly managed they can compete with commercial crops for resources. The objective of this work was to evaluate the effect that cover crops, associated with Coffea canephora cv.
José Antonio Azevedo Espindola   +3 more
doaj   +1 more source

Water Stress Affect Germination, Seed Vigor and Seedlings Growth of Bidens subalternans

open access: yesJournal of Agricultural Science, 2018
The beggartick (Bidens subalternans L.) is one of the main weeds present in agricultural crops, capable of adapting to different environmental conditions. The water stress caused by water deficiency can affect the germination of weed seeds and, consequently, their capacity to colonize the agroecosystem.
Erivanessa C. Sousa   +8 more
openaire   +1 more source

Ecosystem engineers modulate exotic invasions in riparian plant communities by modifying hydrogeomorphic connectivity [PDF]

open access: yes, 2012
Patterns of native and exotic plant species richness and cover were examined in relation with ecosystem engineer effects of pioneer vegetation within the Mediterranean gravel bed river Tech, South France.
Aguiar   +56 more
core   +4 more sources

New records of interesting xenophytes in the Iberian Peninsula [PDF]

open access: yes, 2008
New records of interesting xenophytes in the Iberian Peninsula. Botanical inventories in various parts of Spain mainly between 2005 and 2007 yielded numerous chorological novelties.Cyperus prolifer is probably reported for the first time in Europe ...
Sánchez Gullón, Enrique   +1 more
core   +2 more sources

Phytoplasmas diversity and identification of new aster yellows subgroup (16SrI) associated with weed species in Argentina [PDF]

open access: yes, 2020
Symptoms of phytoplasma infection were observed in different weed species, Bidens subalternans, Conyza bonariensis, Heterosperma ovatifolium and Conium maculatum, collected from diverse geographical regions in Argentina.
Conci, Luis Rogelio   +2 more
core   +2 more sources

Invasive alien plants of Croatia [PDF]

open access: yes, 2018
Invazivne biljke su strane biljke koje su dospjele na neko novo stanište i tamo trajno opstaju zbog izrazite sposobnosti razmnožavanja te potencijala širenja na velika područja. Pri tom negativno utječu na biološku raznolikost, na zdravlje ljudi i sl.
Justić, Marta
core   +2 more sources

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