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Southeast Alabama  gvan334 Mar 24, 2020 3:48 PM CST |
| HELP! I am struggling with daylily rust. I live in zone 8 and our winters haven't gotten cold enough in several years to kill it. I tried everything, except for the really expensive stuff like Headline and just can't rationalize spending that much for roughly 100 daylilies. Any help would be appreciated. |
Name: Sue Ontario, Canada (Zone 4a)             sooby Mar 25, 2020 4:53 AM CST |
| Tebuconazole has been suggested as cost effective. You could also look at a product called Compass which contains trifloxystrobin (a strobilurin, the same type of fungicide as Headline) but I don't know whether it is still as relatively inexpensive compared to other strobilurins as it once was. Ultra Dawn dish soap (I'm guessing lemon "flavour") at 1% to water may have some effectiveness according to a research study years ago. |
Name: Larry Enterprise, Al. 36330 (Zone 8b)        Seedfork Mar 26, 2020 4:53 PM CST |
| @gvan334 I started using BioAdvanced 3-1 Insect, Disease and Mite control back in February on my daylilies, and it has worked pretty well. Not perfect, I do still have a few plants that show some rust, but much better looking this year than in the past few years. I have been applying it to around 400 plants, some in the ground and some potted. Even at the low cost of around $15.00 a bottle, using it every 14 days mounts up, it takes about 3/4 bottle for each application. At least I don't have to put out a lot of money at one time. I am hoping ourdaylily club can work out something this year so we will be able to afford and split the cost of some of the more expensive chemicals that give even better results. |
Name: Sue Ontario, Canada (Zone 4a) sooby Mar 27, 2020 4:50 AM CST |
| Larry, the fungicide in that product appears to be tebuconazole. You can buy that as a stand-alone, might that work out less expensive or do you really need the imidacloprid insecticide in the one you are using? |
Name: Larry Enterprise, Al. 36330 (Zone 8b) Seedfork Mar 27, 2020 11:56 AM CST |
| I had several problems I was fighting with, that was the reason for going with the three in one product. Diseases: Rust and daylily leafstreak. Pests: Aphids, snails and slugs, thrips, and the product also treats for Mites. Also, one of the worst problems with my plants has been leaf miners which this product also says it treats. So that is the reason for the 3-1 Product, I think it is actually pretty cheap compared to trying to buy all the separate products needed to takes its place. I could actually deal with the aphids, snails and slugs, easily. However the fly that lays the eggs and causes the leaf miner damage I had not found a way to deal with and that was as much problem lately as the rust. I have also had thrip damage, but I have not actually seen any mites. |
Name: Robert R. Wharton, TX (Zone 9a)  adc1947 Mar 27, 2020 4:50 PM CST |
gvan334 said:HELP! I am struggling with daylily rust. I live in zone 8 and our winters haven't gotten cold enough in several years to kill it. I tried everything, except for the really expensive stuff like Headline and just can't rationalize spending that much for roughly 100 daylilies. Any help would be appreciated. I'm using Tebuconazole 38.7% active ingredient (group 3) alternating with Thiophanate-methyl 46.2% (group 1) and having good results. I spray at least every 14 days year round since no cold weather here (zone 9) this year. Bit the bullet and bought a gallon of the Tebuconazole 38% and 2.5 gallon of the Thiophanate-methyl 48%. Both require an incredible small amount to the gallon, 2.8gram/1 gallon for one and the other 5.7gm per gallon. I can pretty much spray all my daylilies with the one gallon. At that mix rate, I once had it figured it would last me 50+ years to use it all...! |
Name: Larry Enterprise, Al. 36330 (Zone 8b) Seedfork Mar 27, 2020 4:58 PM CST |
| @adc1947 What was the coast per gal. of the two chemicals, and how long will they be effective? What is the shelf life of the two chemicals? Edited to add: All I could find for the shelf life was a minimum of 2 years! Might stretch that a year or two, but seems like a big waste. |
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