Chemical and cultural control of Ipomoea hederacea var. integriuscula in narrow‐row soybean in southwestern Japan
Chemical and cultural control of
Ipomoea hederacea
var.
integriuscula
in narrow‐row soybean in southwestern Japan
复制标题
日本西南部窄行大豆中 Ipomoea hederacea var. integriuscula 的化学和栽培控制
DOI：
10.1111/wbm.12232
复制
发表时间：
2021
影响因子：
1.4
通讯作者：
K. Homma
中科院分区：
文献类型：
--
作者：
Hidenori Asami;M. Tachibana;K. Homma
在日本，牵牛花（Ipomoeaspp.）大豆田的污染已成为一个严重的问题。为了建立一个控制方法，Ipomoeases物种，本研究考虑了最佳系统结合文化和化学控制方法。通过3年的田间试验，研究了窄行大豆免耕播种与翻耕播种的效果，以及选择性苗后除草剂苯达松和噻虫酰的施用时间。全叶牵牛（Ipomoea hederacea[L.] Jacq. var.integriusculaA. Gray）为翻耕的25-79%，且初期生长受到抑制。在免耕条件下，I.与耕作方法相比，常春藤的生长受到抑制。然而，在免耕中，大豆的初始生长较差，并且大豆冠层中相对光合光子通量密度（RPPFD）的降低被延迟。在大豆的第二和第四三叶期（TLS）选择性苗后除草剂施用的组合是最有效的。常春藤大豆的初始生长量年际波动较大，在第4 ~第7个TLS，RPPFD小于50%的时期也不同。因此，如果最初的大豆生长良好，则杂草控制所需时期的结束可以被定义为第四TLS。免耕栽培与管理相结合，以促进大豆生长，如通过地下灌溉系统控制适当的土壤水分，可能是有效的。hederaceavar.Integriuscula.
In Japan, the spread of morning glory (Ipomoeaspp.) in soybean fields has become a serious issue. To establish a control approach forIpomoeaspecies, this study considered the optimal system combining cultural and chemical control methods. Field experiments were conducted for 3 years to investigate the effects of no‐tillage compared with tillage seeding in narrow‐row soybean and of application timing of selective post‐emergence herbicides bentazone and fluthiacet‐methyl. The cumulative emergence of entireleaf morning glory (Ipomoea hederacea[L.] Jacq. var.integriusculaA. Gray) in no‐tillage was 25–79% of that in tillage, and the initial growth was suppressed. In no‐tillage, the dry matter weight ofI. hederaceavar.integriusculawas suppressed compared to tillage methods. However, in no‐tillage, initial soybean growth was inferior, and reduction of the relative photosynthetic photon flux density (RPPFD) in the soybean canopy was delayed. A combination of selective post‐emergence herbicide applications at the second and fourth trifoliate leaf stages (TLS) of soybean was most effective inI. hederaceavar.integriusculasuppression. The initial growth of soybean greatly fluctuated yearly, and the period when the RPPFD became less than 50% varied at the fourth through seventh TLS. Therefore, if the initial soybean growth is good, the end of the required period for weed control can be defined as the fourth TLS. No‐tillage cultivation combined with management to promote soybean growth, such as adequate soil moisture control by subirrigation systems, may be effective in controllingI. hederaceavar.Integriuscula.