Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds
This study aimed to assess the phytosociology of weeds as a function of different crop management technology levels in cassava production. Field experiments were conducted in Santa Maria (29°41′03″ S; 53°48′25″ W) and Itaqui (lat. 29°07′31″ S; long. 56°33′11″ W), Rio Grande do Sul, Brazil. Treatment...
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| Format: | Article |
| Language: | English |
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American Society for Horticultural Science (ASHS)
2021-06-01
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| Series: | HortScience |
| Subjects: | |
| Online Access: | https://journals.ashs.org/hortsci/view/journals/hortsci/56/7/article-p787.xml |
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| author | Isabel Schlegel Werle Alencar Junior Zanon Nereu Augusto Streck Carlos Eduardo Schaedler Felipe Schmidt Dalla Porta Geovana Facco Barbieri André da Rosa Ulguim Te Ming Tseng |
| author_facet | Isabel Schlegel Werle Alencar Junior Zanon Nereu Augusto Streck Carlos Eduardo Schaedler Felipe Schmidt Dalla Porta Geovana Facco Barbieri André da Rosa Ulguim Te Ming Tseng |
| author_sort | Isabel Schlegel Werle |
| collection | DOAJ |
| description | This study aimed to assess the phytosociology of weeds as a function of different crop management technology levels in cassava production. Field experiments were conducted in Santa Maria (29°41′03″ S; 53°48′25″ W) and Itaqui (lat. 29°07′31″ S; long. 56°33′11″ W), Rio Grande do Sul, Brazil. Treatments consisted of three technology levels: low (postemergence weeding without basal dressing); medium (weeding performed at 7 and 40 days after planting and fertilization with 6.25, 25, and 25 kg⋅ha−1 of N, P, and K, respectively); and high (postemergence application of s-metolachlor; 1250 kg⋅ha−1 of lime and 12.5, 50, and 50 kg⋅ha−1 of N, P, and K, respectively). Weed frequency, density, relative abundance, and importance values were calculated for each location. Then, locations were compared using a dissimilarity matrix. Weed density and diversity decreased linearly as technology levels increased. The predominant weed species found in Itaqui and Santa Maria belong to the Poaceae family. Itaqui presented highest weed diversity among the locations. The genus Cyperus had the highest importance value index in Santa Maria. The use of S-metolachlor at the high technology level provided a lower frequency and lower diversity of weed species than did levels without chemical control in Itaqui and Santa Maria. |
| first_indexed | 2024-12-17T07:34:41Z |
| format | Article |
| id | doaj.art-2807e954c80d48e3bdbaf891d37183b7 |
| institution | Directory Open Access Journal |
| issn | 2327-9834 |
| language | English |
| last_indexed | 2024-12-17T07:34:41Z |
| publishDate | 2021-06-01 |
| publisher | American Society for Horticultural Science (ASHS) |
| record_format | Article |
| series | HortScience |
| spelling | doaj.art-2807e954c80d48e3bdbaf891d37183b72022-12-21T21:58:21ZengAmerican Society for Horticultural Science (ASHS)HortScience2327-98342021-06-01567787794https://doi.org/10.21273/HORTSCI15643-20Technology Levels in Cassava Cultivation Alter Phytosociology of WeedsIsabel Schlegel WerleAlencar Junior ZanonNereu Augusto StreckCarlos Eduardo SchaedlerFelipe Schmidt Dalla PortaGeovana Facco BarbieriAndré da Rosa UlguimTe Ming TsengThis study aimed to assess the phytosociology of weeds as a function of different crop management technology levels in cassava production. Field experiments were conducted in Santa Maria (29°41′03″ S; 53°48′25″ W) and Itaqui (lat. 29°07′31″ S; long. 56°33′11″ W), Rio Grande do Sul, Brazil. Treatments consisted of three technology levels: low (postemergence weeding without basal dressing); medium (weeding performed at 7 and 40 days after planting and fertilization with 6.25, 25, and 25 kg⋅ha−1 of N, P, and K, respectively); and high (postemergence application of s-metolachlor; 1250 kg⋅ha−1 of lime and 12.5, 50, and 50 kg⋅ha−1 of N, P, and K, respectively). Weed frequency, density, relative abundance, and importance values were calculated for each location. Then, locations were compared using a dissimilarity matrix. Weed density and diversity decreased linearly as technology levels increased. The predominant weed species found in Itaqui and Santa Maria belong to the Poaceae family. Itaqui presented highest weed diversity among the locations. The genus Cyperus had the highest importance value index in Santa Maria. The use of S-metolachlor at the high technology level provided a lower frequency and lower diversity of weed species than did levels without chemical control in Itaqui and Santa Maria.https://journals.ashs.org/hortsci/view/journals/hortsci/56/7/article-p787.xmlintegrated weed managementmanihot esculentaweed controlweed dynamicsweed species diversity |
| spellingShingle | Isabel Schlegel Werle Alencar Junior Zanon Nereu Augusto Streck Carlos Eduardo Schaedler Felipe Schmidt Dalla Porta Geovana Facco Barbieri André da Rosa Ulguim Te Ming Tseng Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds HortScience integrated weed management manihot esculenta weed control weed dynamics weed species diversity |
| title | Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds |
| title_full | Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds |
| title_fullStr | Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds |
| title_full_unstemmed | Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds |
| title_short | Technology Levels in Cassava Cultivation Alter Phytosociology of Weeds |
| title_sort | technology levels in cassava cultivation alter phytosociology of weeds |
| topic | integrated weed management manihot esculenta weed control weed dynamics weed species diversity |
| url | https://journals.ashs.org/hortsci/view/journals/hortsci/56/7/article-p787.xml |
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