We Tested The 3 Most Popular Powdery Mildew Controls - Here's What We Learned
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- Опубліковано 18 вер 2024
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I find it very helpful to trim off all of the lower leaves. It improves airflow and reduces stress on the plant by removing diseased leaves. It will also help reduce the amount of spray you need to use.
Yes, me too. Baking soda and trimming the leaves.
Me too especially for my Dhalias
I'll be sticking to the baking soda. The copper is not allowed where I live due to evidence that it's harmful to aquatic life, and I think that's important. 💚
You are right, that is important. If you are careful and do not over-apply (enough to cause runoff), you will not wash it into watersheds.
What measurements do you use?
Even if you are careful with application doesn’t the copper build up in the soil? I worry about that with copper treatments for my fruit trees. I try not to use them more than a handful of times each year. I would go for the baking soda for frequent treatment
Milk didn’t work for me either. Thanks for taking the time to do this experiment. Very helpful…
did you use a surfactant? Did you thin out the foliage for better air flow?
I live in Alabaam where heat and humidity cause fungus, rust.powdery mildew to thrive. It can destroy a plant in a feww days if untreated. I've tried hydrogen per oxide and baking soda with little effect. What has worked very well for me is Immunox sprayed every week to ten days. I had no issues with powedery mildew, or other fungus this year.
Milk is actually vary effective for Me. The one caveat though; and it took me years to realize this, IT HAS TO BE APPLIED IN FULL SUN. It’s not about the ph, there’s something about the fats, or proteins that when applied in full sun, fries the spores. It works great that way. 2 things though. It attracts flys, and if you have a large plant/ leaves that never receive full sunlight, then it just won’t work. I dilute it to a 50/50 milk/water ratio. Sometimes 40/60 and it still works. I do apply it multiple days (3 or 4) in a row.
True. My peonies can't escape the sun on our property. That 50-50 milk water solution was their savior
The fats aren't frying the spores, what happens when you spray in full sun is that the milk dries much quicker and forms a layer on the leaves, which is what you need to alter the pH. Applying with no sun, milk will run off and not have time to dry.
Can I use low-fat milk?
I did find it to help a bit. If I get the powdery mildew again, I'll try a stronger mix.
Milk is most useful for aphids and spider mites. The milk crystallizes on the aphids and mites, effectively smothering them. If you can get fresh cow milk, unpasteurized, that’s the best. But whole milk from the store works amazingly well too!
Edit!!! The milk only works on soft bodied bugs, not the hardshell type!
Also a thing to remember, milk does NOT harm pollinators!!!
Milk saved me from aphids in my lettuce. Amazingly effective.
Excellent point about using unpasteurized milk 🤔 I wonder if he had used it could it have made a difference in his results? I used milk on my zinnias and it worked for a short time. Unfortunately, the powdery mildew still took over probably because I am in a very humid climate zone 8B. I’m not going to give up though I think next time I will try the unpasteurized milk thank you for the suggestion.
@@litaapreston9605 my point was about aphids and spider mites…
But ultra pastured milk (such as the milk he used) to me, has lost its ability to work fully.
@@shellycarter155 oh yes I wrote that down on my notes as well since my plants suffer from them nasty bugs too. Thank you
@@litaapreston9605 you’re welcome doll! Would you like the website that I discovered this on? I’m more than happy to share as they helped me save many of my plants!!!
Oh my gosh i had the same baking soda leaf browning and i thought i did something really wrong! I'm so glad you showed that. I didn't know it was normal.
In our experience, what works is potassium bicarbonate (not sodium bicarbonate) - but you need a surfactant so that it stays stuck to the leaves. That’s why we use Milstop …. We avoid copper because it can accumulate in the soil
I would also note that the only curcurbits we grow have excellent resistance to PM ( and DM) - that makes a huge difference…
Could you please share the varieties proved to be resistant to PM? Are there any also resistant to squash vine borer? Thank you so much for your response🙏
From a home gardener's perspective, for a quick treatment tool here in the very humid south, whole milk and baking soda are good for spot treating heavily affected areas until one is able to make a trip to town or Amazon delivers. Down here, we can actually watch it melt off the plant leaves immediately upon spraying the plants, but they most certainly aren't going to control the PM by any means.
L.A.B. works great as a foliar and so does kombucha as a foliar for powdery mildew
💯 Homemade LABS FTW. if you prefer a purchased product, lab tested, EM-1 and EM-5 work great as well!
Wow great video! I will be sharing it with friends.
My peonies had the problem. I first trimmed the lower leaves where it started. I drenched the plants with a mixture of water and milk a couple of times per week for two weeks. This was two summers ago and the mildew never came back.
I had tremendous success this year with a 30% shade cloth (I’m zone 7b western NC) and 2Tbs peroxide to 32oz water… next year I’m going to buy the concentrated 12% peroxide as my adjustable hose sprayer can be used (it doesn’t go high enough for 3%)
The Powdery Mildew was horrible this year for me. Any advice on how to have better soil to avoid it from ever starting?
He says you can't, however you can pre-emptivelly spray with a diluted baking soda solution before the mildew starts if you don't want to use copper fungicide.
Not really; it’s the same for late blight on tomato leaves. Rotating the crops in a small home garden doesn’t work either. However, it might be possible to somewhat restrict the spread if you dispose of diseased plants in the garbage, rather than in a compost pile, at the end of the season.
@@oh_k8 Thank you for the response!
@@brucebiendarra9843 Thank you for the response!
I use this mix: baking soda, milk, neem oil, vegetable oil (for the active ingredients to better hold onto the leaves and stems)
What’s the ratio and proportion for the mixture? Thanks for sharing your knowledge
@@awakenfool Powdery mildew remedy:
Ingredients:
- 240 ml (1 cup) cow milk (whole milk works best)
- 15 grams (1 tablespoon) baking soda
- 960 ml (1 quart) water
- 30-60 ml (2-4 tablespoons) neem oil
- Crushed garlic cloves (optional)
- 30-60 ml (2-4 tablespoons) vegetable oil
Instructions:
1. Mix 240 ml of cow milk with 960 ml of water in a spray bottle.
2. Add 15 grams of baking soda to the mixture.
3. Add 30-60 ml of neem oil (adjust based on preference).
4. Add 30-60 ml of vegetable oil to help the solution adhere better.
5. Shake the spray bottle well to ensure thorough mixing before each application.
Apply the spray to both the upper and lower surfaces of the leaves, covering infected areas and nearby healthy foliage as well as soil. Repeat every 7-14 days or as needed.
I would like to see this test on tomatoes
Milk is actually slightly acidic, not alkaline (lactic acid). I'm wondering if its more about the bacteria that like the milk that also add some defense against the mildew. But it's pretty apparent that it's not effective!
Anxious to hear the results of this experiment.
Thanks good to know!
For milk it’s better to use raw unpasteurised milk, rather than store bought milk.
I need some of that copper fungicide. Fungus killed most of my cucumber and melon plants and I had to start over. Baking Soda did very little.
Fantastic info!! Thank you so much. Will look forward to combating the powdery mildew !!!
from Melbourne Australia, loved the video well conducted experiment ill try the copper this season.
Great episode ⭐
Hi from south Louisiana. I did catch the amount of copper that you use per gallon. Please can you share? I really do like this video in that it is simple and to the point.
Thanks for all your helpfulness over the years. Godbless.
I guess, he used a premade spray (I was listening, not watching 😁),
When you buy a concentrated solution they list the dilution proportions for every purpose on the bottle
I’ve used baking soda… in Portland Oregon… Where it rains… It works great!!! It works great!!! Just make sure to mix it well so it doesn’t clog the sprayer!
Here in the southeast, I just resolve to succession sow my zucchini plants every 2-3 weeks...nothing works long enough to make spraying 2-3 times per week worth the trouble in my neck of the woods. My biggest nemesis is squash bugs though.
I'm shocked your kale isn't covered...lol! I live in Ohio and have had to build tents all around my brassicas. Otherwise the cabbage worms destroy everything. In regard to the fungicides, if you ever redo this experiment, it would be interesting to see if the baking soda worked better when not sitting next to a badly infected plant. Thanks for sharing, it's greatly appreciated 🙏
I used the diluted milk, on a sunny day in the AM, it did seem to help the leaves. Wasn't a cure all though.
❤ Love the side by side Comparisons. I am very much into The science!! 🧪😍🤓 Greatly Appreciated 🙏👍
Milk has never done anything for me. Im gonna try the baking soda.
Awesome video!
Very helpful...
Thank you for doing this experiment for us! I think it makes the best sense to pretreat the plants early, and only use the copper fungicide if there is an infestation--that way you may not need the copper until another time. The longer I can make something last, the better.
I love using neem oil. It's safe, and very effective. Use no more than 3% neem oil, spray very early morning or late evening. Don't spray the actual flowers, or it could potentially kill pollinators. Don't spray butterfly host plants. Great for my catnip and squashes that get PM every year.
Great video!
I like the safety of baking soda. And I'm guessing if it's treated maybe every 2 days, it's efficacy would be higher? Great experiment!
I struggle hard with powdery mildew (swamp dweller) and this year I was unable to recover. Well... I got a few patty pans and the tromboncino are doing really well! But this is very helpful! One... I am not going to hesitate on the copper next year and I'm going to pretreat with the baking soda. I put so much effort and space into squash this year and it was a flop pretty much across the board. 🫤 It feels good to have a plan going into next year. In the mean time, I thank God for the produce auction.
What about Neem Oil? Has many benefits. Battling Blight is one of those benefits. Wish you included this one instead of milk personally.
What do you all think of Neem oil for powdery mildew? I tried baking soda solution earlier this summer and it wasn't all that great. Trying not to use chemical solutions. Would love to know what you think about Neem oil.
I've found Neem much more effective than milk.
I do like to use things we can get at a grocery store, thanks for the tips, I have tomatoes growing all winter in my sunroom, also where I start my seedlings, I will try the baking soda as preventative. I do have a fungicide but is not the easiest to apply indoors, clogs up my sprayer, just not ideal indoors.
Great info!
I gave up on powdery. It decimates my garden like nothing else and no spray has ever worked. I will only grow resistant varieties from now on. Tromboncino squash so far has been a good one. Also growing in the micro climate around my pool seems to help with the chlorine vapors.
I actually have been using baking soda + a little bit of soap for years, but I had no idea you needed to spray both the top and bottom of the leaf! Haha oops
neem oil is suppose to work also
peroxide also works for mildew
Milk does not inhibit mold it helps it grow.
Luke when are you restocking on veggie seeds will you have the pimento pepper seeds
November 1st! :)
I tried milk and it can work, if you use the right one and maybe the dilution is important aswell? (never tried it pure).
Here in germany we say "use raw milk or really fresh milk, because if it pasteurized or even slightly heated in the process, it wont work anymore". Its about the bacteria in it, some even use buttermilk or so.
Recommended Dilution is 1:5 or 1:9 and spray every 2-7 days (if it has mildew more often, if its for prevention once a week is ok )
Baking soda works aswell and will work better if you use a little bit oil (and an emulgator for the oil like dishwasching liquid or potassium soap! ). I even found out without oil and stuff i "burned" the leaves of my cucumber plant, with it and the same amount of baking soda worked without them having any damage!
I had even better results with potassium bicarbonate (but with oil and soap aswell! )
I ONLY use milk for baking and for my daily supplement of COFFEE.😄
Would you consider showing and experiment with cinnamon some time?
Copper is organic, but it does build up in your soil over time with continued use. If you use enough of it, the soil can become toxic to earth worms. It also costs allot, so it's not a good option for cheapskates like me.
What about calcium magnesium citrate for powdery mildew? You mentioned it in a video about a year ago.
Copper or sulfur, which metal would be safest?
Have found garden lime works better than milk or baking soda as an alkaline treatment
Can it be used on edible fruits like raspberries?
No potassium bicarbonate?
I guessed milk would fail because I think it almost helps foster the mildew by molding on the leaf 🤷♂️
You might also care to test hydrogen peroxide. I have a volunteer pumpkin in the compost for the neighbor's grandchildren. Sprayed an hour ago at about 8ml/l. We'll see. The main garden tomorrow.
Milk is good for aphids!
Luke, I struggle with keeping my seeds viable now (sorry for off topic). My seeds were in a damp house all season, now I want to vacuum seal them and put into refrigerator but I want to dry them up prior to that. Could you please suggest a DIY method for this?
I have a dehydrator, the lowest temp is 105F, but I’m afraid it’s too hot for seeds already in storage (1-2 years).
I have silica bags.
Outside is very humid, our humidity doesn’t fall below 75% and often is in 80s%
Please 🙏
I also have a dehumidifier and I think I can dry up one room and keep seeds there for a week or so. Will it help?
Did I miss something?? So with the baking soda you didn't add the soap to your mixture like in past?? If so, why?
I heard whey was an effective treatment. Is there a reason why it would be effective where straight up milk is not?
Whey is not effective either. This is all based on lab studies where allegedly whey eats the bacteria, but it doesn't account for thr mildew returning due to the weather. It's not an effective solution in a wet environment. It might work in a dry climate if it can work in a one and done but if you are in a humid and wet climate, it seems to be ineffective at keeping the mildew away.
In theory it had higher levels of bacteria and the idea is it out competes the fungus for resources. I've not had success with it. I still throw it in my compost along with lactofermented "juice" from pickles and sauerkraut and the like... but they've not worked for me as a foliar spray. I've even tried the JADAM method (rotted vegetation in water) but the fungus just keeps coming back. I'm going to try the copper fungicide next year.
@@jeas4980 Great explanation, thanks! I am also going to try the copper, though I think I might give a couple of recurring spots a treatment now.
Look into Jadam LAB (lactic acid bacteria solution) easy to make and I had good results on plants that consistently mildewed. If Luke used the Fairlife milk he had in his hand, it’s ultra pasteurized so very low micro count.
I used hydrogen peroxide on my pumpkins and it completely took care of it. 10 TB to one gallon of water. Have you used HP or why wouldn't you? Just curious.
If you get PM it's from environment. If you kill the PM, but leave the plants in the same environment, what do you think happens?
What about potassium bicarbonate? I so badly want to know from you if it is better, comparable, or worse than the "big 3" that your video is on. I want to know your honest opinion. (As you always give) I trust you more than anyone when it comes to gardening information. Please, please, please do something on potassium bicarbonate!
People, including commenters below say to use neem oil instead of copper fungicide because neem oil is safer overall. But I disagree because its harmful to pollinators. I'll stick to Captain Jack's Organic Copper Fungicide for now till something better and or safer comes out.
I use fat free milk works for me....
LIVING TRADITIONS HOMESTEAD used RAW MILK UN-pasturized and had success. processing it makes it ineffective.
Does Liqui-cop also work on bean rust fungus? If so, I can kill 2 fungi with one stone.
It works on bean rust well!
Milk didn't work for me either 😕
Can you make a video about mosaic virus with zuchinni and squash? I
MIgardener is there a problem with copper accumulating in the soil?
I’m not worried about it. You would have to use a ton of it and use it all the time to have any concern. Plants also take up copper, so it will feed plants that use it.
@@MIgardener Thanks! looking forward to actually harvesting zucchini next year
Any way you might be able to help me identify my problem with my small citrus that is growing it is loosing leaves I've used one round of neem was wondering if ligui cop might work
Thank you for your videos also there always keeping me up to date here are done pics of the tree growing tho Any tips are much appreciated thanks man
My grandma used nonfat powdered milk in a spray bottle. Regular milk doesn't work.
Bah, it's the end of the season. Powdery mildew is gonna come either way. I quit chasing this end season occurrence years ago. If it occurred early mid- summer, then I would definitely address it.
I wonder if the fact that you were using “ultra filtered” milk made a difference? Still pretty underwhelming though.
I used full fat and 2% and found no difference. I even used concentrated whey from the cheese making process. I made sure to spread carefully including under each leaf. The mildew just spread all over the plant and I had to prune it all and even pull some of the plants. My weather was very wet and humid this year. It may work if you live in a dry climate though but I would not recommend this to anybody in the north east or a wet humid climate.
Use milk.
He's not saying anything about hydrogen peroxide.
*I didn’t
.
I found milk did not work, it just made my plants stink.😮
I was told to use milk. Watered it down a bit and used a spray bottle, and sprayed the leaves. It actually worked.
I didn't try this year as I didn't grow any squash types.
Wonderful that I see you found milk was also very weak so it was not just me.
you need to use fat free milk so it doesnt spoil on your plants and stink.
@@marksilvestro450I found milk did not work at all despite carefully spraying everyday. I see MI Gardener came to the same conclusion so I feel it's not just me. I think if it worked for you it may have either been aided by a change in the weather or placebo. It's been very wet and hot in Central Canada since spring and I can tell you this will not work for us. Perhaps if you are in a drier climate it may work but that is probably due to the drier climate than the milk. I found it was useless in a northern climate.
@@oh_k8 did you use fat free milk?
In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him.
1 John 4:9 KJV
I used 18 percent cream 1-3 parts it did work well took of the infected leaves as well ,I watched a vid earlier this year where they were using iodine spray on the tomatoes,they do this every year with great success.i don't remember the recipe but they sear by it it's on YT. I did they something new this year on my tomatoes because they were getting black spot or something,and I had nothing to loose, so I removed the infected leaves then crushed up 1- 325 mg of aspirin in 1 gallon of water and gave it to each plant it took a few days each plant puked up an said thank you! It's being said that it's the salicylic acid in the aspirin that helps build the plants immune system to fight off diseases. Some soak their seeds overnight before planting in a mild solution.I will do this next year as a test to see if my plant's are more resistant to diseases as I am now bataling cucumber monster and squash vine boar,lost zucchini and Pattie pans this year so iam always looking for insight that others may have. Rudolf Steiner had a lot of amazing insight on agriculture many lectures you can still find available on line! HAPPY GARDENING We must stay diligent and never give in to defeat because there's always another way we just have to find it!