Conyza spp.: From Ugly Duckling to Agriculture's Fittest Swan - Brief Review

Planta Daninha

Embrapa Agropecuária Oeste, Dourados, Brazil¹  Instituto Federal de Tecnologia de Santa Catarina, Santa Rosa do Sul, Brazil¹  CONCENÇO, G.¹  CONCENÇO, S.E.¹ 

关键词: horseweed;    fleabane;    ruderal;    Grime's theory;    demographic theory;   

DOI  :  10.1590/S0100-83582016340100019

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

Conyza spp. are widely responsible for yield losses in agriculture due to its worldwide occurrence, resistance to herbicides and other traits which turn these species into first grade weeds. Since the 1980's, these species started to be cited on books both related to the ecology and the weed science, being usually classified as ruderals. Occurrence of Conyza in crops shows that these species are highly adaptable due to its recent evolutionary origin and occur in environments prone concomitantly to a moderate set of competition, disturbance and stress. There are also limitations in Grime's theory which may lead us to mistakes about the behavior of Conyza. Thus, simple and isolated recommendations certainly will not solve the problem of Conyza. Neither soil tillage nor tolerant crops to 2,4-D will free the agriculture from this weed, being necessary an integrated approach to solve this problem which demands qualified human resources in weed science and planning.

【 授权许可】

Unknown