White rot and allium leaf miner

Produce > Edible Plants

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bombus:
I cannot grow Onions, Garlic, or spring onions because of the dreaded White Rot. Now for the last couple of years i have to net my leeks because of Allium Leaf Miner. Now commercial growers must have some insecticide spray they are able to use. Anyone know what it is?

Obelixx:
I found this online - https://sustainable-farming.rutgers.edu/organic-farm-calls-white-rot-on-garlic-leek-onion/#:~:text=Even%20conventional%20agriculture%20has%20limited,35%20(Dichloropropene%20and%20chloropicrin).

You need a fungicide. The French are big on making their own or buying a "purin" concentrate made from horsetail. It's apparently effective as both prevention and treatment for all sorts of fungal things like peach leaf curl, tomato and potato blight.

1kilo fresh horsetail
9 litres of calcium free water

Combine the two in a plastic bucket - not metal - and leave for 2 weeks. Stir occasionally. It's ready when the water has gone black. It will smell so you may want a lid.

Strain the resulting liquid, put the goo on the compost heap and dilute the rest 1 part to 9 parts water and spray. Not harmful to plants or insects.

BarriedaleNick:
There has been a bit of chat on here about using garlic/onion concoctions to treat white rot.
https://www.mgabc.org/node/2751#:~:text=Since%20the%20fungus%20is%20stimulated,fungus%20will%20starve%20and%20die.

It seems to work at least lessening the severity..

Plot22:
I have recently submitted several posts in the basics section of allotments4all regarding white rot on alliums. I respectively suggest that you have a look under the basics section to see if it answers your problem. It works for me and so far this season it continues to do so.

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