Let's have a more advanced discussion about BYDV sprays

yellow belly said:

Imho Green bridge from cereal or grass to cereal seen it in the 1980s is a problem but not from brassica to cereal

Altitude here is equivalent to farming a couple of hundred miles further north at least

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Simon C said:

Yes John, I dare say you are right. It is just that I have seen this wind blown infestation several times over the years and it's effects seem to be hundreds of times worse that wingless aphids wandering around in a seedbed.

Trouble is there is so much talk about drilling "on the green" and spraying off after drilling, which people are doing successfully, makes you wonder what is right.

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yellow belly said:

Dying couch rhizomes suppresses crops glyphosate has eliminated it

Bad grassweeds the spring crops or non cereal crop is the only answer
Or good ploughing with the right plough
Most ploughing I see on heavy land is no better than a set of discs
Proper burial and level finish is impossible on heavy land from all the ploughs sold now on silty and sandy soils they can work but not on any remotely heavy land Rag dale denchworth etc

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