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Arable Farming
Cropping
To drill OSR or not
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<blockquote data-quote="Brisel" data-source="post: 6245056" data-attributes="member: 166"><p>I did answer this earlier in the thread. With more larvae in the crop, it is highly likely that there will be more adults around in the autumn. If you ever wanted to have a year off growing brassicas, this is it IMO.</p><p></p><p>A colleague of mine in Herts gave up growing osr in 2016 after successive years of increasing flea beetle damage. He started again last year & got a reasonable crop with little pressure - no one else was growing brassicas in the area so the host for the pest had gone. Is this a pest that goes in cycles?</p><p></p><p><a href="https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwirwtyvqobiAhUK6OAKHX16BVQQjRx6BAgBEAU&url=http%3A%2F%2Fwww2.nau.edu%2Flrm22%2Flessons%2Fpredator_prey%2Fpredator_prey.html&psig=AOvVaw3mS7UnGkmDx6RYi4C7nGyn&ust=1557212394332347" target="_blank"><img src="http://www2.nau.edu/lrm22/lessons/predator_prey/hare_lynx_graph.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p>Imagine the Hare line as the osr area sown and the Lynx population as the CSFB population. Lower the national osr area and the pest levels will fall.</p></blockquote><p></p>
[QUOTE="Brisel, post: 6245056, member: 166"] I did answer this earlier in the thread. With more larvae in the crop, it is highly likely that there will be more adults around in the autumn. If you ever wanted to have a year off growing brassicas, this is it IMO. A colleague of mine in Herts gave up growing osr in 2016 after successive years of increasing flea beetle damage. He started again last year & got a reasonable crop with little pressure - no one else was growing brassicas in the area so the host for the pest had gone. Is this a pest that goes in cycles? [URL='https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=2ahUKEwirwtyvqobiAhUK6OAKHX16BVQQjRx6BAgBEAU&url=http%3A%2F%2Fwww2.nau.edu%2Flrm22%2Flessons%2Fpredator_prey%2Fpredator_prey.html&psig=AOvVaw3mS7UnGkmDx6RYi4C7nGyn&ust=1557212394332347'][IMG]http://www2.nau.edu/lrm22/lessons/predator_prey/hare_lynx_graph.png[/IMG][/URL] Imagine the Hare line as the osr area sown and the Lynx population as the CSFB population. Lower the national osr area and the pest levels will fall. [/QUOTE]
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