Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Claudel Lemieux"'
Autor:
Bernard Panneton, Marie-Josée Simard, Louis Longchamps, Anne Légère, Claudel Lemieux, Gilles D. Leroux
Publikováno v:
Weed Science. 57:187-193
Weed management decisions based on weed threshold models offer the opportunity to reduce herbicide use by allowing the possibility of forgoing treatment or lowering rates. Weed thresholds based on a relative leaf-cover model were tested during a 4-yr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aaffc75ccd7c45f394d162bb2a5b9e3e
https://doi.org/10.1614/ws-08-090.1
https://doi.org/10.1614/ws-08-090.1
Publikováno v:
Weed Research. 43:323-332
Summary This work was initiated to integrate an image analysis system and a prediction equation to support decisions for post-emergence herbicide applications under field conditions. Data were collected from 1999 to 2001 in 32 commercial fields to ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88b0f33a30105be805c658c228dba528
https://doi.org/10.1046/j.1365-3180.2003.00347.x
https://doi.org/10.1046/j.1365-3180.2003.00347.x
Autor:
Daniel C. Cloutier, Chantal Hamel, Diane Lyse Benoit, Claudel Lemieux, Maryse L. Leblanc, Anne Légère, Louis Assemat
Publikováno v:
Weed Technology. 16:638-644
A 3-yr study was conducted to establish if the presence of corn had an effect on the emergence patterns and total weed seedling density under growing conditions in southwestern Quebec. Weed seedling emergence was monitored in permanent quadrats throu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c97d3b7e202f40e2c418b9e6a7c34d1
https://doi.org/10.1614/0890-037x(2002)016[0638:eotpoa]2.0.co
https://doi.org/10.1614/0890-037x(2002)016[0638:eotpoa]2.0.co
Publikováno v:
Weed Science. 47:498-504
Competitive cereal cultivars are less susceptible than others to weed interference. Their characterization may provide selection criteria that can be used as guidelines to develop new, even more competitive cultivars. Root exudates are a potential me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9e2550e67d130ae986501fb5e61e546
https://doi.org/10.1017/s0043174500092171
https://doi.org/10.1017/s0043174500092171
Publikováno v:
Crop Protection. 18:501-508
Field experiments were conducted in 1996 and 1997 to study the effects of crop growth stage and images recording height (size of the area included in the image) on the estimates of leaf cover obtained through digital image analysis techniques, and to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57632c1d41724e10409279199869884b
https://doi.org/10.1016/s0261-2194(99)00052-6
https://doi.org/10.1016/s0261-2194(99)00052-6
Publikováno v:
Weed Research. 39:329-343
A flexible sigmoidal model relating crop yield to relative leaf cover of weed was derived. The model was shown to embody a hyperbolic, a symmetric sigmoidal and an asymmetric logistic model as special cases. Data from field experiments conducted in 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52460d02d254a46df71c1880ded57297
https://doi.org/10.1046/j.1365-3180.1999.00150.x
https://doi.org/10.1046/j.1365-3180.1999.00150.x
Publikováno v:
Weed Science. 47:297-304
The relative leaf area of weeds is a good predictor of the outcome of weed-crop competition. However, this variable has not been used in decision-making tools for integrated weed management because leaf area cannot be measured quickly. A powerful ima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::422efbe5ead5003c894a901e3c0567ee
https://doi.org/10.1017/s0043174500091803
https://doi.org/10.1017/s0043174500091803
Publikováno v:
Weed Technology. 12:446-453
The practical application of yield loss prediction models using relative leaf area of weeds is limited due to the lack of a quick and accurate method of leaf area estimation. Leaf cover (the vertical projection of plant canopy on the ground) can be u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7aa9d3f3c08147562aacb80aadb00102
https://doi.org/10.1017/s0890037x00044122
https://doi.org/10.1017/s0890037x00044122
Publikováno v:
Weed Science. 41:600-606
An experiment was established at three sites to determine the longevity and distribution of rhizome buds of two quackgrass biotypes in the soil profile under two tillage systems (no-till or fall-plow). The experiments were established in May 1987 at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::952650d7f7aae1a36cbba7a7b1b52736
https://doi.org/10.1017/s0043174500076384
https://doi.org/10.1017/s0043174500076384
Publikováno v:
Weed Science. 40:534-541
This work was initiated to develop a method of sampling quackgrass populations. Shoot and bud distri- bution of 36 field populations was obtained. The results demonstrated that shoot count was inappropriate in assessing quackgrass bud populations and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::796475451fb971f8010e029f448c154e
https://doi.org/10.1017/s0043174500058094
https://doi.org/10.1017/s0043174500058094