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Post by kazedwards on Feb 24, 2015 20:07:46 GMT -5
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Post by diane on Feb 25, 2015 1:45:34 GMT -5
Garlic rust, like all rusts I've seen, is bright orange. It grows here in midsummer.
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Post by meganp on Feb 25, 2015 3:16:03 GMT -5
a fungal growth perhaps - have you tried rubbing it off? Are these your TGS seedlings?
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Post by robertb on Feb 25, 2015 7:12:28 GMT -5
It looks like some sort of fungus, but it's not rust. That's a summer infection which forms rust-coloured spots, mostly on the leaves.
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Post by ilex on Feb 25, 2015 11:54:49 GMT -5
No, not rust.
I have some rust now. I consider rust a spring or fall thing. I never have rust in summer. I do have some now, but it was 24C on monday, so looks like spring is here.
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Post by kazedwards on Feb 25, 2015 13:13:27 GMT -5
That is a relief! Yes they are from TGS. They are still pretty small but starting to get there first true leaves
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Post by 12540dumont on Mar 6, 2015 21:30:08 GMT -5
TGS shouldn't get garlic rust. This is not rust. Rust looks like reddish specks on the green leaves. Horrible disease.
This why I ONLY buy garlic from Joseph. A trusted source with never any rust. (You'll have to get in line to get Joseph's garlic).
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Post by Joseph Lofthouse on Mar 6, 2015 21:54:04 GMT -5
Rust looks like reddish specks on the green leaves. Horrible disease. This why I ONLY buy garlic from Joseph. A trusted source with never any rust. (You'll have to get in line to get Joseph's garlic). And that's why I put an allium quarantine in place for my garden. I don't want to be importing or exporting diseases. Gotta protect my family, friends, and collaborators. |
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Post by kazedwards on Mar 7, 2015 0:47:41 GMT -5
That's what I thought. I think it's a fungal thing but the plants are otherwise healthy. Just very grateful it's not rust.
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Post by ilex on Mar 7, 2015 2:39:22 GMT -5
Can you really quarantine for rust? I feel that if the conditions are right, there's not much you can do. If relative humidity is high and it's warm but not hot, you are in trouble. Poor air circulation makes things much worse.
I have some perennial alliums, and anyway, there are always some of the biennials growing any day of the year.
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Post by Al on Mar 7, 2015 3:15:17 GMT -5
I have always accepted a bit of rust on leeks & garlic as inevitable at my allotment, it must be in the air & soil, low level infection does not affect yield or quality much.
But the garlic leaves last year were completely orange by the end of the summer, so this year I intend to do everything I can to halt the rust.
I soaked cloves in fungicide before planting, I will remove old leaves, spray with dilute milk, spray with compost tea, spray with seaweed, spray with fungicide, any orange pustules will be smeared with Vaseline. And I hope some clever breeder out there will come up with a stainless gene, we need a garlic 'inoxydable'!
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Post by Joseph Lofthouse on Mar 7, 2015 3:50:54 GMT -5
Can you really quarantine for rust? I am quarantining against all garlic diseases: Known and unknown. Viruses, insects, blights, bacteria, whatever... I didn't realize until a couple of years ago -- with the widespread outbreak of Aster Yellows Virus -- how fortunate I am as a garlic grower to have a climate that is super cold in winter, and super arid during the summer. That combination works wonders at minimizing both macro and micro pests. I even quarantine my different fields from one another. Once a variety goes into a field it only gets replanted into that field. My intent is to keep my garlic as clean as possible considering where it's been. I am aghast about all the varieties I brought in from Oregon, and especially from Pullman, but I had to start somewhere. An infected garlic is better than no garlic. I feel sad about the offers I turn down for free garlic varieties... But I already have sufficient for my plant breeding needs. Thank you Oregon, and Pullman, and everyone else that sent varieties before quarantine. Eventually I may discard the clonal varieties and start over in new fields containing only seed grown plants. Oh, and did I mention that I am a culling maniac? If I notice any plant, anywhere in my garden, of any species, that has disease on it then it's chop, Chop, CHOP!!! No coddling of weak plants in my garden. |
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Post by Al on Mar 7, 2015 6:12:11 GMT -5
You're a hard man Joseph.
Chop, chop CHOP is a good plan to cull the weaklings, certainly for your situation where you could be a source of virus & disease free garlic for those in the infected zones. You deserve some compensation for suffering your cold & drought. Around here our poor summers are somewhat compensated for by the fact that Scotland grows seed potatoes for southerners, virus spreading aphids get blown away, no need to irrigate either.
I will attempt to be ruthless in my campaign against onion white rot which occasionally affects some of my onions. Any onion with a hint of fluffy white bottom will get the full Ebola treatment. White suits, incineration & disinfection of the area of outbreak. I am just about to make up garlic water to put on next years onion patch in the hope of fooling dormant schlerotia into activity when there are actually no alliums planted there. This will clean the ground a bit I hope.
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Post by 12540dumont on Mar 7, 2015 21:30:36 GMT -5
I don't think you can get of sclerotia that easily. In an experiment with pure-culture sclerotia of Sclerotium cepivorum and Stromatinia gladioli a large proportion of the sclerotia survived burial for 20 years in the field in the absence of host plants. Some evidence for metabolic activity or leakage leading to the gradual erosion of the sclerotial contents was obtained with S. cepivorum. The results of other experiments suggested that, for unknown reasons, a variable proportion of sclerotia formed naturally on infected plants may decay shortly after their formation, but those which survive beyond this limited period are likely to remain viable for many years. The viability of sclerotia was also reduced by prolonged flooding, but the period for which land would have to be under water excludes this as a method of eliminating sclerotia from infested land in the UK. Treatment with the mycoparasite Teratosperma oligocladum did not affect the survival or infectivity of sclerotia of S. cepivorum or S. gladioli. www.researchgate.net/ profile/ Claire_Sansford/ publication/ 227896423_Longterm_survival_of_sclerotia_of_Sclerotium_cepivorum_and_ Stromatinia_gladioli/ links/ 53fc88c10cf2dca8ffff2df4.pdf and this: Incorporation of ground poultry litter into soil at 5% by weight reduced survival of sclerotia after 13 days, and incorporation of litter at 10% nearly eliminated it. These results indicate that the direct-observation technique may be used to evaluate animal wastes and other agricultural byproducts for biocontrol activity against sclerotia of M. phaseolina in soil. www.ncbi.nlm.nih.gov/pubmed/16897591 |
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Post by Al on Mar 8, 2015 3:17:53 GMT -5
Very useful info. there on sclerotia. www.kes.talktalk.net/onions/index.htmlThis article is giving me hope that my onions will be successful despite the surrounding bio hazards. For several years I have had only a very few alliums with early signs of fluffy white mould, these have been promptly removed, & now I scoop out earth where these grew & bin it, then flood pit with Jeys fluid. I hope few if any sclerotia have formed, comparing white rot to bubonic plague: I have culled victims at the first sneeze before full blown buboes develop. Once in the soil sclerotia do seem to be tough little blighters, I choose to believe my garlic water does some good but it may be that waving a crusefix at the malevelant miasma with potpourri hanging under my nose would be just as effective. |
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