snipe
Member
- Location
- west yorkshire
what are peoples thoughts/experience of spraying the above with cold temperatures at night? Damage to crop or reduced control.
Broadway/pacifica cold nights
- Thread starter snipe
- Start date
- Location
- East yorks
I am waiting till these couple of colder nights pass this week, specifically the frost risk and will do straight after
Thinking the same
- Location
- Cirencester
Did plan on doing mine yesterday but a lift pump failure on the sprayer put a stop to that idea, fixed it but looks a tad on the windy side here this morn. Will sit tight and do it next week. No frost this morn!!!
- Location
- Lincolnshire
Monday afternoon.
- Location
- East yorks
Agreed but like to have 2 frost free after if I can
FarmerBruce
Member
- Location
- Yorkshire
It s the difference in temp more than the frost. Better going at 8-9 degrees with a night temp of 1 than at 17 degrees with night temp of 4 say.
- Location
- Haute Vienne, France
As mentioned above more important than a slight frost is the difference between max and min temperatures being 10/12 degrees at most. A great deal is made here of humidity as well. Ideally 70% plus though we go down to 60% if needs must. So its generally one load in the morning then another going into the evening avoiding the drier middle of the day.
There are two issues. Active weed growth to take the herbicide in properly and diurnal temperature differences that will cause crop and weed stress.
It is better to treat when coming into a cold spell than it is coming out of one. It takes time for the soil to warm up, especially if it is wet. You need at least 6 degrees at 4” deep at 9-10am for good control with Atlantis/Pacifica products and a couple more degrees for Broadway/Palio.
Big swings in daytime and nighttime temperatures will put the crop and weeds under stress which can result in crop damage and reduced control.
Be very careful with tank mixing SU graminicides with PGRs, fungicides and trace elements. Be aware that SU herbicides are sensitive to hard water, so consider water conditioners. SUs are affected differently to glyphosate so do not assume that adding ammonium sulphate or acidifiers will deal with it. Always consult a BASIS registered agronomist and/or the technical helpline of the product manufacturer.
It is better to treat when coming into a cold spell than it is coming out of one. It takes time for the soil to warm up, especially if it is wet. You need at least 6 degrees at 4” deep at 9-10am for good control with Atlantis/Pacifica products and a couple more degrees for Broadway/Palio.
Big swings in daytime and nighttime temperatures will put the crop and weeds under stress which can result in crop damage and reduced control.
Be very careful with tank mixing SU graminicides with PGRs, fungicides and trace elements. Be aware that SU herbicides are sensitive to hard water, so consider water conditioners. SUs are affected differently to glyphosate so do not assume that adding ammonium sulphate or acidifiers will deal with it. Always consult a BASIS registered agronomist and/or the technical helpline of the product manufacturer.
Feldspar
Member
- Location
- Essex, Cambs and Suffolk
Oh dear. I was told the opposite today. Also, NIAB say temp at the time of application is everything (although take the point about diurnal variability and crop stress).
My point was about having an actively growing target weed at the time of application and soon afterwards.
I have both Hatra and Palio to apply to wheat fields but we had -3 degrees last night but with 12 degrees this afternoon. I will wait for the nights to get warmer before applying them.
Feldspar
Member
- Location
- Essex, Cambs and Suffolk
Oh dear. I did some today. Maybe had better wait until end of the week then more.
- Location
- Haute Vienne, France
Possibly you are aware already but may I point out the geographical distance between the various participants in this thread and their varying climates..........
Let us know how it works please.
SilliamWhale
Member
I remember doing some BWay Star about 2 or 3 years ago and used no Kantor and went too early (probably earlier than now) and I had very poor control.
The last two years I've tried to go a lot later and have a rule of thumb of last few days of March/ early April. Even if the risk of brome getting too strong I think its worth it vs poor control early on. Fine balance though
The last two years I've tried to go a lot later and have a rule of thumb of last few days of March/ early April. Even if the risk of brome getting too strong I think its worth it vs poor control early on. Fine balance though
April here too