My courgette leaves have loads of silvery patches along the veins and I'm worried they've got something nasty! 16-05-2009, 09:04 AM. Squash and zucchini leaves turning a dusty gray indicate (as you note) the plants are in serious decline. If you have a similar problem with your courgettes… All other plants are fine. Squash Silver leaf symptoms have been observed on all types of squash and are common in many zucchini varieties. The spray solution may be partially to blame; if sprayed in the middle of the day the oil could exacerbate sunburn to leaf tissue. As directed by my mother, I combined a tsp of baking soda with a quart of water in a spray bottle; shook it up real good so all the soda dissolved. Silver leaf symptoms on a squash plant. Because most of the growth of powdery mildews is found on the plant surface they are easily targeted with fungicides. Leaves turn pale green, yellow, or brown; dusty silver webs on undersides of leaves and between vines. The plants seem to be very healthy though and do need potting on which I swear I will do today! There's no point reading history if you don't use the lessons it teaches. My courgette leaves have loads of silvery patches along the veins and I'm worried they've got something nasty! I could not live without a garden, it is my place to unwind and recover, to marvel at the power of all growing things, even weeds! Organic gardener Sally Smith answers your questions about why courgette leaves may turn silver and how to treat blackfly. They feed on leaf tissues, leaving leaves with silvery or white damage, as well as sticky, glossy patches of honeydew. Courgette, marrow, pumpkin and squash problems. Prices and download plans . Grow Your Own Magazine Last week we went on holiday, however before we went I had a few jobs to do in the garden: I started by tying up my tomatoes once again and ‘nipping’ off the side shoots and then I picked the rest of my climbing peas and froze them. Then sprayed each infected leaf each morning until the spots when away. I have the feeling I've seen this even worse once in the past when there was lots of hot sunlight on a stressed plant. Logged Mitsy. (Courtesy of Timothy Coolong). Powedery mildew doesn't usually start until Aug or so, when the plant is older, at least in my garden. When leaf silvering is severe, fruit color is lighter than normal. Vegetarian Recipes | 2 Replies 912 Views May 27, 2013, 20:03 by hanssg : Leaves going white and crispy on Bean Plants You can be especially sure this is the case if those spots start to turn brown. Symptoms further develop interveinally until the entire upper leaf surface is distinctively silver. Cause. I blew up your picture and had a good look, its perfectly normal. If your zucchini leaves develop little yellow spots, you may have squash bugs. Courgettes, marrows, pumpkins, squashes and other members of the cucurbit family are fun to grow. Organic gardener Sally Smith answers your questions about what to do if you have mildew on your courgette leaves and how preparation is key to avoiding it in the first place. Experienced Member; Location: Co Durham; 344; Re: Yellow leaves on courgettes « Reply #1 on: June 18, 2009, 07:44 » Have you checked for greenfly? 16-05-2009, 09:04 AM. Fine Food. Many varieties of courgette and marrow have this appearance and it is perfectly normal and nothing to … Is this normal?!! When leaf silvering is severe, fruit color is lighter than normal. 25 Phoenix Court, Hawkins Road, Squash Silver leaf plant with severe symptoms. Copyright © 2020 Aceville Publications Ltd. Resources | Colchester, Essex, CO2 8JY 10 Replies 7830 Views June 18, 2011, 18:07 by Grubbypaws : crispy leaves on my spuds Started by hanssg on Grow Your Own.