I've noticed over the past month or so my onions' leaves have been curling up and twisting and generally getting very distorted. A cursory googling suggested thrips but I found none on there. It occurred to me today to dig one up and check out the bulb, and I took some pictures.
In the last picture if you look closely you can see a little orange/brown thing, which I think is some sort of pupae. Interestingly, the actual bulb looked fine, aside from having this thing inside it. It didn't appear eaten, the roots looked ok, it's just the leaves that have become distored.
Now, assuming there is a little grub, or pupae, or whatever it is, in every onion with twisted leaves, are they all buggered? It seemed to be spreading, for a few weeks. Fortunately I've planted far too many onions anyway. Of my three onion beds, one is next to the already infected one, and the other is half way up the plot. I've got loads of shallots to plant out still, and I'm really looking forward to eating them, so I'd like to prevent them getting attacked.
Thoughts?
In the last picture if you look closely you can see a little orange/brown thing, which I think is some sort of pupae. Interestingly, the actual bulb looked fine, aside from having this thing inside it. It didn't appear eaten, the roots looked ok, it's just the leaves that have become distored.
Now, assuming there is a little grub, or pupae, or whatever it is, in every onion with twisted leaves, are they all buggered? It seemed to be spreading, for a few weeks. Fortunately I've planted far too many onions anyway. Of my three onion beds, one is next to the already infected one, and the other is half way up the plot. I've got loads of shallots to plant out still, and I'm really looking forward to eating them, so I'd like to prevent them getting attacked.
Thoughts?
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