OBM worse than last year

[snarling bee]

Just been looking at a few ears. At least one grain site affected per ear in resistant varieties and between 2 and 5 in susceptible ones. That's a big % loss. The surprise is the supposedly resistant ones, Skyfall and Elicit.

 

[rob1]

Just been looking at a few ears. At least one grain site affected per ear in resistant varieties and between 2 and 5 in susceptible ones. That's a big % loss. The surprise is the supposedly resistant ones, Skyfall and Elicit.

was it orange or yellow midge though ?

 

[snarling bee]

orange larvae?? between 1 and 4 per grainsite.

 

[rob1]

orange larvae?? between 1 and 4 per grainsite.

dont look for midge nor for damage, wont use an insecticide so no point worrying about damage by looking for it

 

[B'o'B]

orange larvae?? between 1 and 4 per grainsite.

Total grain site loss or shriveled grain?

 

[yellow belly]

most years a few grain sites are affected on some heads if you look
in bad years it is yield reducing

1 grain sit per ear of 60 grains is 1.4 % if the grain is dead then there could be compensatory filling of other grains

 

[snarling bee]

I don't spray summer insecticides either (with late drilling of wheat I shall probably give up autumn ones as well). But I didn't see a threshold at early ear emergence, yet I would consider the damage to be probably 3% which would be over an economic spraying threshold I would have thought. I need to look back at my BASIS project.
I hope there is some compensatory grain growth, but with the larvae sucking nutrients out of affected grain sites I don't see that.