|
|
|
|
|
| Wang,Congyan; Jiang,Kun; Zhou,Jiawei; Liu,Jun. |
| ABSTRACT Allelopathic suppression of the growth of co-occurring plant species in invaded ecosystems is an important factor in some plant invasions. This study uses leaf extracts of the invasive plant species Conyza canadensis to determine its allelopathic effects along a latitudinal gradient, and under different cover classes and degrees of invasion, on seed germination and growth of Lactuca sativa, a sensitive bioindicator of allelochemicals. The allelopathic effects of C. canadensis on seedling height, root length, seedling biomass, germination percentage, germination potential, germination index, germination rate index, and vigor index of L. sativa increased significantly with increasing latitude. A possible explanation is that the leaves of plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathic effects; Conyza canadensis; Invasive plant species; Lactuca sativa; Seed germination and growth. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200212 |
| |
|
|
| MARINHO-PRADO, J. S.; QUEIROZ, S. C. do N. de; PRADO, S. de S.; ASSIS, M. C. de. |
| Resumo: Os extratos vegetais de quatro espécies das famílias Asteraceae e Verbenaceae foram avaliados quanto a bioatividade sobre as lagartas Anticarsia gemmatalis Hubner, 1818 (Lepidoptera: Erebidae) e Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae). Os extratos hexânicos, diclorometânicos, metanólicos e aquosos de Clerodendrum splendens, Conyza canadensis, Tithonia diversifolia e Vernonanthura westiniana foram oferecidos às lagartas por ingestão em ensaios, avaliando-se a biologia e o comportamento desses insetos. Os extratos vegetais de C. splendens em diclorometano e hexano e de V. westiniana em metanol avaliados sobre A. gemmatalis causaram altas taxas de mortalidade observadas nas lagartas, sendo que o extrato de C. splendens em diclorometano... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Vernonanthura westiniana; Clerodendrum splendens; Extrato Vegetal; Praga de Planta; Anticarsia Gemmatalis; Helicoverpa armigera; Bioactive compounds; Conyza canadensis; Tithonia diversifolia. |
| Ano: 2018 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1095015 |
| |
|
|
| RIZZARDI,M.A.; SCHNEIDER,T.; BIANCHI,M.A.; ROCKENBACH,A.P.. |
| ABSTRACT: Horseweed is an annual cycle weed naturally controlled by the herbicide glyphosate. However, the continued use of this product has selected tolerant and resistant populations. The objective of this study is to analyze the occurrence of horseweed biotypes with a low glyphosate susceptibility in the states of Rio Grande do Sul, Paraná and Mato Grosso do Sul. Seeds of horseweed plants (Conyzaspp.) that survived glyphosate applications were collected in RR soybean crops, totaling 137 samples from 37 municipalities. The seeds of the biotypes were sown, and the plants originated from them, when they reached the stage of four to six leaves, were subjected to a treatment with 1,440ga.e.ha-1 of glyphosate. According to the results, 108biotypes were not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conyza bonariensis; Conyza sumatrensis; Conyza canadensis; Resistance; Chemical control. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100290 |
| |
|
|
|
