Glyphosate works best at dawn (in the lab)

[Bogweevil]

the herbicidal effectiveness of glyphosate can depend upon the time of day of application5,6,7,8. One mechanism that influences the timing of responses of plants to their environment is the circadian clock. Circadian rhythms are biological cycles with a period of about 24 h that persist in the absence of external cues. In plants, circadian rhythms are generated by a series of interlocked transcription-translation loops and posttranslational mechanisms that are known collectively as the circadian oscillator. ... We reasoned that pervasive circadian regulation in plants might underlie rhythmic responses to certain chemical applications, and tested this notion for glyphosate-based herbicides due to their widespread use. This is an important question, because rhythmic responses of plants to agrochemicals introduce novel opportunities to refine or reduce agrochemical use.

We identified daily fluctuations in the effective dose of glyphosate. Increasing the dusk glyphosate concentration to 150 g/ha caused an equivalent reduction in hypocotyl length as 100 g/ha at dawn (Fig. 1d). Therefore, using the decrease in hypocotyl length as a measure of glyphosate effectiveness, 1.5 times more glyphosate was required at dusk to have the same effectiveness as at dawn. This suggests that plant growth is less sensitive to a dusk glyphosate application.

Plant circadian rhythms regulate the effectiveness of a glyphosate-based herbicide - Nature Communications

Glyphosate is the world’s most widely-used herbicide. Here, Belbin et al. show that plant responses to glyphosate, and therefore herbicide activity, depend on plant circadian rhythms suggesting that considering the time-of-day of application could lead to more efficient agrochemical use.

www.nature.com

 

[deere 6600]

the herbicidal effectiveness of glyphosate can depend upon the time of day of application5,6,7,8. One mechanism that influences the timing of responses of plants to their environment is the circadian clock. Circadian rhythms are biological cycles with a period of about 24 h that persist in the absence of external cues. In plants, circadian rhythms are generated by a series of interlocked transcription-translation loops and posttranslational mechanisms that are known collectively as the circadian oscillator. ... We reasoned that pervasive circadian regulation in plants might underlie rhythmic responses to certain chemical applications, and tested this notion for glyphosate-based herbicides due to their widespread use. This is an important question, because rhythmic responses of plants to agrochemicals introduce novel opportunities to refine or reduce agrochemical use.

We identified daily fluctuations in the effective dose of glyphosate. Increasing the dusk glyphosate concentration to 150 g/ha caused an equivalent reduction in hypocotyl length as 100 g/ha at dawn (Fig. 1d). Therefore, using the decrease in hypocotyl length as a measure of glyphosate effectiveness, 1.5 times more glyphosate was required at dusk to have the same effectiveness as at dawn. This suggests that plant growth is less sensitive to a dusk glyphosate application.

Plant circadian rhythms regulate the effectiveness of a glyphosate-based herbicide - Nature Communications

Glyphosate is the world’s most widely-used herbicide. Here, Belbin et al. show that plant responses to glyphosate, and therefore herbicide activity, depend on plant circadian rhythms suggesting that considering the time-of-day of application could lead to more efficient agrochemical use.

www.nature.com

Was told years ago roundup did best sprayed in the morning has all day for plant to sook it in as opposed to night when sooking ability is less.

 

[Yale]

Sprayed the last one I burned off before 8am.

Did kill off well.

 

[7610 super q]

I love the smell of Glyphosate in the morning. Smells like....... smells like victory....

 

[Little squeak]

I always use a low water volume when spraying Glyphosate and try to do when the leaves are dry how doe's dry leaves (typically evening) compare to wet leaves (typically early morning)?

 

[Bogweevil]

I always use a low water volume when spraying Glyphosate and try to do when the leaves are dry how doe's dry leaves (typically evening) compare to wet leaves (typically early morning)?

Good point - cannot spray if leaves dewy

 

[Cowcorn]

I love the smell of Glyphosate in the morning. Smells like....... smells like victory....

I love the origanal qoute from apopalaplse now its got so many uses . Best one ive heard was a comedian shouting " i love the smell o f pussy in the morning ........

 

[ollie989898]

Call me a sad twit who should know better but there is no more satisfying a product than the garden centre stuff you can get containing glyphosate and good old diquat in mixture. They don't like that up em.

 

[ollie989898]

You can't beat LI-700 or Validate when it comes to roundup. There, I've said it. Again.