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Weird Leaf Curl
- Thread starter illWill
- Start date
do you have a pic of the bottom of a leaf? looks like edema
All those dimples on the bottom of the leaf, is that normal for that kind of species? Never seen that before.
Well I swore they weren't aphids and from the pics if those are bugs they appear to be the same size, although I didn't have near as many. After uploading the pics to a few groups every one said aphids and that some aphids are way smaller than others, can cause leaves to curl up, etc.
Hopefully those aren't bugs and it's a minor issue that can be relived relatively easy
Hopefully those aren't bugs and it's a minor issue that can be relived relatively easy
from what i can see in the pick they are not aphids, its most likely edema cus your overwatering
Edema tends to occur when plants take up more water through the roots than they can use or release through their leaves. This usually happens when the soil is warm and very moist, while the air is cool and humid, as often occurs on overcast days. High light intensity has also been found associated with edema.
Although edema does not significantly harm the plant, it is unsightly. Minimize problems with edema by avoiding over watering during humid, overcast weather, and reducing humidity in a greenhouse. Some varieties of plants are more prone to develop edema than others.
Edema tends to occur when plants take up more water through the roots than they can use or release through their leaves. This usually happens when the soil is warm and very moist, while the air is cool and humid, as often occurs on overcast days. High light intensity has also been found associated with edema.
Although edema does not significantly harm the plant, it is unsightly. Minimize problems with edema by avoiding over watering during humid, overcast weather, and reducing humidity in a greenhouse. Some varieties of plants are more prone to develop edema than others.
I don't think I overwater. I let it get pretty dry. Sometimes until they wilt a little. I DO have fungus gnats though. Hmmm. I'll try watering less
Scope shot, if it helps. They do not appear to be mites, or moving. I have observed even tinyyy pests with this before
http://img841.imageshack.us/i/z0e5.jpg/
http://img545.imageshack.us/i/cakt.jpg/
Scope shot, if it helps. They do not appear to be mites, or moving. I have observed even tinyyy pests with this before
http://img841.imageshack.us/i/z0e5.jpg/
http://img545.imageshack.us/i/cakt.jpg/
Looks like salt?
yup thats def edema hope you fix it
Edema Can Be Lessened By The Following
Small yellow spots in areas between the veins are often the first symptom observed on the top of the leaf. Small, translucent, watery pustules are seen on the underside of the leaf below the yellowed areas. These "blisters" and yellowed areas usually occur first on older leaf margins. The blisters enlarge and become brown in color and corky or scabby in texture. The entire leaf may yellow, die, and drop off. This leaf death and defoliation occurs in a pattern somewhat similar to that caused by bacterial blight.
Cause
Edema is caused by an imbalance of the water uptake and loss by the plant. A high level of water absorption by the roots is favored by warm moist soil conditions while a low level of transpiration (water loss) is favored by cool air, high relative humidity, low light levels (cloudy weather), and poor ventilation. Water retention in the cells causes some cells to burst and form watery blisters. As these broken cell areas heal, they become dry and corky.
Mite (two-spotted, Tetranychus urticae Koch) feeding may also play a role in edema development. Potter and Anderson screened ivy geranium cultivars for resistance to two-spotted spider mite attack and evaluated edema severity on the mite-infested plants. There seems to be a relationship in which mite resistant cultivars develop less severe edema than mite susceptible cultivars. The authors theorized that the plant's physiology or nutritional status that results in edema development may also favor mite survival. Edema and mite resistant cultivars were "Double Lilac White," "Sunset," "Madame Margot," "Amethyst," and "Salmon Queen". The most mite and edema susceptible cultivars included "Sybil Holmes," "Yale," and "Pascal."
- Improve drainage and water less frequently.
- Heat and ventilate the greenhouse to reduce humidity.
- Space plants to provide good air circulation.
- Water in the morning so that the soil is not too wet overnight.
- Avoid wetting the leaves since wet leaves lose less water.
- During cool cloudy weather, follow a watering schedule that maintains an even moisture level.
- Maintain good mite control by regularly applying a miticide.
Small yellow spots in areas between the veins are often the first symptom observed on the top of the leaf. Small, translucent, watery pustules are seen on the underside of the leaf below the yellowed areas. These "blisters" and yellowed areas usually occur first on older leaf margins. The blisters enlarge and become brown in color and corky or scabby in texture. The entire leaf may yellow, die, and drop off. This leaf death and defoliation occurs in a pattern somewhat similar to that caused by bacterial blight.
Cause
Edema is caused by an imbalance of the water uptake and loss by the plant. A high level of water absorption by the roots is favored by warm moist soil conditions while a low level of transpiration (water loss) is favored by cool air, high relative humidity, low light levels (cloudy weather), and poor ventilation. Water retention in the cells causes some cells to burst and form watery blisters. As these broken cell areas heal, they become dry and corky.
Mite (two-spotted, Tetranychus urticae Koch) feeding may also play a role in edema development. Potter and Anderson screened ivy geranium cultivars for resistance to two-spotted spider mite attack and evaluated edema severity on the mite-infested plants. There seems to be a relationship in which mite resistant cultivars develop less severe edema than mite susceptible cultivars. The authors theorized that the plant's physiology or nutritional status that results in edema development may also favor mite survival. Edema and mite resistant cultivars were "Double Lilac White," "Sunset," "Madame Margot," "Amethyst," and "Salmon Queen". The most mite and edema susceptible cultivars included "Sybil Holmes," "Yale," and "Pascal."
Wow, thanks NPG, you've been a ton of help. Maybe my close spacing is playing a part of it.. 23 plants in like 9 square feet lol.... maybe the Brazilian starfish are just extra finnicky regarding water uptake and that plays into it too. I will seriously try watering less.
One more question: if this is caused by me overwatering, and I start watering less, will it "go away" or just stop spreading?
P.s. In a way, this is a relief. I feared an al"mite"y and relentless pest epidemic
One more question: if this is caused by me overwatering, and I start watering less, will it "go away" or just stop spreading?
P.s. In a way, this is a relief. I feared an al"mite"y and relentless pest epidemic