Square Foot Gardening Forum
[table bgcolor=#000000 height=275][tr][td]
Silverleaf on squash Toplef10Silverleaf on squash 1zd3ho10

Hello Guest!
Welcome to the official Square Foot Gardening Forum.
There's lots to learn here by reading as a guest. However, if you become a member (it's free, ad free and spam-free) you'll have access to our large vermiculite databases, our seed exchange spreadsheets, Mel's Mix calculator, and many more members' pictures in the Gallery. Enjoy.

Silverleaf on squash I22gcj10Silverleaf on squash 14dhcg10

[/td][/tr][/table]
Search
 
 

Display results as :
 

 


Rechercher Advanced Search

Latest topics
» Eddie Willers 1st rookie mistake, what to do?
by Tcwilson99 Today at 1:01 am

» Panic Buying due to Cornavirus Pandemic
by yolos Yesterday at 11:27 pm

» Saving Kale Seeds
by markqz Yesterday at 11:02 pm

» How's the Weather Where You're At?
by Scorpio Rising Yesterday at 11:02 pm

» Birds of the Garden
by Emily49 Yesterday at 8:32 pm

» SFG Journey: Memorial Day
by has55 Yesterday at 5:04 pm

» A Louisiana hello
by OhioGardener Yesterday at 4:39 pm

» What Have You Picked From Your Garden Today
by plantoid Yesterday at 1:37 pm

» N&C Midwest: May 2020
by Scorpio Rising Yesterday at 10:24 am

» CANADIAN REGION: What are you doing April, May, June, 2020
by Kelejan Yesterday at 8:58 am

» Almost 68, and this is a new one on me !!!!
by Kelejan Yesterday at 8:53 am

» Hello from Tavistock, Ontario, Canada
by lvanderb Yesterday at 6:47 am

» 2020 Bunny Gardening
by Scorpio Rising 5/27/2020, 6:35 pm

» Cannellini Beans
by sanderson 5/27/2020, 3:01 pm

» New from Rancho Cucamonga, CA
by Tcwilson99 5/27/2020, 1:33 pm

» Squash bugs
by Luke Allen 5/26/2020, 8:57 pm

» Mail order tomato plants
by Scorpio Rising 5/26/2020, 5:50 pm

» Spring Flowers
by OhioGardener 5/26/2020, 5:19 pm

» what do you put in the compost that other may not of thought of?
by Jazzlover 5/26/2020, 2:08 am

» Can you continuously add material to a pile that is composting?
by mollyhespra 5/25/2020, 10:08 pm

» Rogue strawberries
by mollyhespra 5/25/2020, 9:53 pm

» Cheerleaders needed, please. This is daunting.
by mollyhespra 5/25/2020, 9:30 pm

» New England, May 2020
by Scorpio Rising 5/25/2020, 9:26 pm

» Just about got enough seeds sown & seedlings transplanted
by Scorpio Rising 5/25/2020, 9:22 pm

» Sprouting - 95% success
by Emily49 5/25/2020, 2:39 pm

» Hi from Fredericton New Brunswick
by Eddie Willers 5/25/2020, 1:41 pm

» SFG top hats
by plantoid 5/24/2020, 6:08 pm

» What are you eating from your garden today?
by Hypogeiody 5/24/2020, 10:36 am

» Wood Pallets Hugelkultur Bed
by Dan in Ct 5/24/2020, 7:52 am

» NEED SOIL! Mahalo and much Aloha, San Diego Style!
by Judy McNutt 5/24/2020, 2:11 am

Google

Search SFG Forum

Silverleaf on squash

Go down

Silverleaf on squash Empty Silverleaf on squash

Post  1airdoc on 5/21/2012, 8:14 pm

I had been noticing the problem below on several leaves of my squash and zucchini(which I grew from seed). At first I suspected it was downy mildew and treated with sulfur, but on closer inspection, I found that the spots are not fuzzy and do not rub off. Silverleaf on squash Silver10
Here's another view:Silverleaf on squash Silver11
And a thirdSilverleaf on squash Silver13

I had read other posts that said the silver color was normal, but on closer investigation, I found that it is caused by the silverleaf white fly. These tiny bugs are only 1/8 inch long and do not over winter in areas with freezing temperatures (of course, we had a very mild winter this year!). When their immature forms feed on the sap of the squash leaves, their saliva introduces toxins that cause the changes you see in the images above, which is caused by separation of the surface of the leaf from the lower layer. It can cause the plants to be stunted and have reduced fruit quality (pale fruit) and production.

You can find the flies by turning the leaf over and carefully inspecting the lower surfaces. I found several, but they were too small to photograph. Here's an image from online:
Silverleaf on squash Silver12
These look large, but when you compare them to the size of the leaf hairs beside them, you can appreciate their tiny size.

It only takes a small number of flies to cause the damage. I read that they are hard to control; insecticidal soaps are supposedly effective.
1airdoc
1airdoc

Male Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)

Back to top Go down

Silverleaf on squash Empty Re: Silverleaf on squash

Post  crs on 5/21/2012, 9:52 pm

My zucchini leaves look like that too I was told it was normal. I will be checking tomorrow and try to get a handle on it. They are planted right next to my tomatoes, cucumbers, and cantaloupe and watermelon. I may have a bigger problem Thanks for that post.
crs
crs

Posts : 65
Join date : 2012-05-05
Location : West Central MO

Back to top Go down

Silverleaf on squash Empty update

Post  1airdoc on 5/26/2012, 5:03 am

I used spinosad (organic pesticide) on the underside of the squash and zucchini leaves and then a couple of days later sprayed sulfur under the leaves and when I checked yesterday I found only a very rare whitefly. All the leaves have the silver spots on them, but the spots don't seem to be enlarging.
1airdoc
1airdoc

Male Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)

Back to top Go down

Silverleaf on squash Empty Re: Silverleaf on squash

Post  rod champion on 5/31/2012, 9:55 am

what is the damage is left alone?
avatar
rod champion

Male Posts : 125
Join date : 2011-12-21
Age : 70
Location : Piedmont NC

http://www.southholstonriverflyshop.com

Back to top Go down

Silverleaf on squash Empty Re: Silverleaf on squash

Post  1airdoc on 6/1/2012, 9:40 am

I have left the original damage alone (i.e., I haven't removed the leaves). The silver spots have not spread on the leaves where I originally noted them, and the leaves otherwise look healthy. I think that since I began treating the plants, the spots have decreased or not spread on new leaves, though. I still note an occasional white fly, but not many.

I opted to try to treat my plants since I read that the silver leaf can cause the plants to produce fewer and sometimes discolored fruit.
1airdoc
1airdoc

Male Posts : 188
Join date : 2011-05-04
Location : 7a (Northern middle Tennessee)

Back to top Go down

Silverleaf on squash Empty Re: Silverleaf on squash

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum