White spots and black spots on plants. Remedy?

white spots and black spots on plants remedy, gardening, Squash white spots
Squash- white spots
white spots and black spots on plants remedy, gardening, Lilac white spots
Lilac-white spots
white spots and black spots on plants remedy, gardening, It s kinda hard to see in pic black spots on Mint
It's kinda hard to see in pic-black spots on Mint
  22 answers
  • Clyde Baisey Clyde Baisey on Jul 05, 2013
    White spots on squash are more than likely, mold. Water only in early mornings before the sun comes up. late afternoon or evening watering usually results in wet leaves all night with cooler temperatures that promote mold growth.

  • Jenny Jenny on Jul 05, 2013
    Thank you! Do I need to use something to rid it of the mold?

  • Judy Johnson Wilson Judy Johnson Wilson on Jul 05, 2013
    You could try a tepid mild dish soap bath for it. Spray bottle, small amount of mild soap and water. It won't hurt the plant. Also when you water try to not water the plant itself, just the soil around it. Soaker hoses are great for this.

  • Jenny Jenny on Jul 05, 2013
    Thank You. I will try that!

  • Lawn Pro Lawn Pro on Jul 06, 2013
    Get insectacidal soap and spray.can be found a any garden store,and follow directions

  • Mary Miranda Mary Miranda on Jul 06, 2013
    Well I was about to add but, Clyde, Judy and Lawn Pro basically covered it all. Hope this does work out for you. Please keep us posted on the results. Ü

  • Jenny Jenny on Jul 06, 2013
    Thank you all. :). It has rained for the past three days. So I will try the soap when it passes.

  • Dflawson Dflawson on Jul 06, 2013
    I used the dish soap remedy to discourage pests, but it only burned the leaves. Probably used too much, used it at the wrong time of day (when the sun was high), or didn't have the right measurements or a mild enough detergent. The plants survived, but they sure looked awful for awhile there.

  • Caley's Culinaries Caley's Culinaries on Jul 06, 2013
    White and black spots are mold and fungus. You need a fungicide. Soap works on bugs, but won't fix spots. We start with baking soda. You already learned not to spray in the day. You are making progress!

  • Caley's Culinaries Caley's Culinaries on Jul 06, 2013
    The spots are from the wet, wet Spring and Summer. No drought restrictions this year!! :)

  • Caley's Culinaries Caley's Culinaries on Jul 06, 2013
    Also, be careful the soap you use does not say "detergent." Detergent will always burn plants no matter when you spray and in any strength. Soft soap, hand soap...I stay away from dish soap because it is hard to tell sometimes if it is detergent.

  • Jenny Jenny on Jul 06, 2013
    Thanks for all the help! Good to know about the detergent. I have some fungicide I used on my Hollyhocks last year so hopefully when the rain lets up I can spray it on. :)

  • Dflawson Dflawson on Jul 07, 2013
    What kind of soap is mild enough to use in a homemade pesticide?

  • Sheila E Sheila E on Jul 07, 2013
    Spray for powdery mildew: 1 gallon of water1 tablespoon of baking soda1 tablespoon of vegetable oil1 tablespoon of dishwashing liquid

  • Gayle Valverde Gayle Valverde on Jul 07, 2013
    I use the original blue Dawn throughout my garden & have never had a problem with burning on any plan/shrub or tree...1 Tbsp in a hose end sprayer of a small squirt into a hand held sprayer. You can also use regular old Baking Soda from your pantry to kill powdery mildew. I use 1 Tbsp in a spray bottle filled with water. Make sure you get the underside of the leaves and re-apply every day or so until there is no new "spots". Good luck. :)

  • Jenny Jenny on Jul 07, 2013
    Thank you Gayle!

  • Jenny Jenny on Jul 07, 2013
    Thank you Sheila!

  • Judy Judy on Jul 07, 2013
    Ok...the white stuff is probably mold & a good fungicide or some of these other remedies might help but I don't know about using a fungicide in the veggie garden. That being said, the white stuff on the squash looks a lot like the problem I had for several years running with my green beans & it was NOT mold. I had red spider mites. They're very hard to see with the naked eye but turn a leaf over in good light & watch for movement on the leaf.......

  • Jenny Jenny on Jul 07, 2013
    Oh! I think that is what I had last year. They killed all of my squash!

  • Maddie Maddie on May 11, 2017
    Thank you for the remedy, will go with blue dawn and h2o in spray bottle....

  • Denise Denise on Jun 08, 2017
    My rose bushes dropped all their leaves after treating for mold and fungus. Should I cut the bush back now in June?

  • Michelle Leslie Michelle Leslie on Aug 13, 2020

    Hi Jenny, this might sound crazy but add banana peels and a little beer around the plants. Dig a hole near or at the roots and drop in 2 banana peels and cover. The plants will absorb the nutrients from the peels and the beer and the condition of the plants will GREATLY improve. It also helps keep the bugs away.