Abstract
Weeds represent a significant problem in Thailand’s sugarcane production. The various cycles of sugarcane cultivation result in degrees of weed severity in which each species requires a different weed control method, the most popular of which is the post-emergence herbicide method. However, sugarcane farmers often use incorrect rates, and operators’ safety is missing or applications are not selective, causing toxicity and interrupted growth of sugarcane. The effects of post-emergence herbicide types, time, and application rates are presented herein, through an experiment in Northeast Thailand, conducted in a randomized complete block design (RCBD) with four replications. The herbicides paraquat and ametryn were evaluated, with paraquat being more effective, yet resulting in higher toxicity and lower yield components. We may conclude through our experiments that ametryn and paraquat can be applied only once for sugarcane at the tillering stage and at rates of 540 and 2400 g ai ha−1, respectively. These rates were lower than the recommended rates, which represented the minimum doses necessary to control Thailand’s dominant weed species like Brachiaria distachya (L.) Stapf., Dactyloctenium aegyptium (L.) P.B., Praxelis clematidea R.M King & H. Rob and Pennisetum polystachion (L.) Schult. Consequently, the adequate control of weeds is a rather case-specific situation and therefore each weed species should be taken into account.
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Claims 7
Claim · model-written summary
Paraquat controlled weeds more effectively than ametryn.
Verbatim
e0“The herbicides paraquat and ametryn were evaluated, with paraquat being more effective, yet resulting in higher toxicity and lower yield components.”
t0“Sugarcane”
Claim · model-written summary
Paraquat caused higher toxicity than ametryn.
Verbatim
e0“The herbicides paraquat and ametryn were evaluated, with paraquat being more effective, yet resulting in higher toxicity and lower yield components.”
t0“Sugarcane”
Claim · model-written summary
Paraquat resulted in lower yield components than ametryn.
Verbatim
e0“The herbicides paraquat and ametryn were evaluated, with paraquat being more effective, yet resulting in higher toxicity and lower yield components.”
t0“Sugarcane”
Claim · model-written summary
The authors recommend one ametryn application at 540 g ai ha−1 during tillering.
Verbatim
e0“ametryn and paraquat can be applied only once for sugarcane at the tillering stage and at rates of 540 and 2400 g ai ha−1, respectively.”
Claim · model-written summary
The authors recommend one paraquat application at 2400 g ai ha−1 during tillering.
Verbatim
e0“ametryn and paraquat can be applied only once for sugarcane at the tillering stage and at rates of 540 and 2400 g ai ha−1, respectively.”
Claim · model-written summary
The study doses were below recommended rates yet sufficient to control dominant weeds.
Verbatim
e0“These rates were lower than the recommended rates, which represented the minimum doses necessary to control Thailand’s dominant weed species like Brachiaria distachya (L.) Stapf., Dactyloctenium aegyptium (L.) P.B., Praxelis clematidea R.M King & H. Rob and Pennisetum polystachion (L.) Schult.”
t0“Sugarcane”
Claim · model-written summary
Weed control decisions should account for each weed species.
Verbatim
e0“each weed species should be taken into account.”
t0“Sugarcane”
The same questions in other papers
paraquat · pest · Saccharum officinarum (sugarcane)Results agree
1 paper in the same direction as this paper
- no effect
paraquat · yield · Saccharum officinarum (sugarcane)Results agree
1 paper in the same direction as this paper
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.