The slimy grubs of cereal leaf beetle have been reported on crops. The grub stage eats strips out of leaves. Most crops are usually able to cope with the damage, but if the flag leaf is being badly grazed then yield can be affected. An insecticide that has been applied for aphids or orange wheat blossom midge will have an effect on cereal leaf beetle grubs. The grubs should disappear by mid to late June to be replaced by the adult beetles from early to mid-July onwards, by which time most crops should be safe from any significant damage.
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