takipanos
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Odd Marks On Zucchini Leaves

Hello,

Can the experts take a look at these pics and let me know what they think the stringy white marks are on these leaves? I am lookin for a natural pesticide to prevent the bugs from eating my leaves but I do not think the white part is powdery mildew.

[url=https://postimage.org/image/al448ywn5/][img]https://s16.postimage.org/al448ywn5/photo.jpg[/img][/url]

[url=https://postimage.org/image/m849gbvx7/][img]https://s17.postimage.org/m849gbvx7/photo1.jpg[/img][/url]

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rainbowgardener
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You have several things going on. The white squiggly marks are leaf miners -- little insect larvae that burrow inside the leaves and travel around eating the leaf tissue. They are not susceptible to any kind of spray, since they are inside the leaf. The easiest thing is just to remove and destroy all the leaves with squiggles, as long as the infestation isn't so bad that doing so will defoliate your plant. Otherwise look up leaf miners.

But you also have little round holes that are something else, possibly flea beetles, and you have one leaf that is half gone, not sure what did that. And your little plant is generally not looking vibrantly healthy. I'm not sure if that is just because of the insect attacks or if there is something else about the conditions it is in (amount of sun, water, soil fertility).
Twitter account I manage for local Sierra Club: https://twitter.com/CherokeeGroupSC Facebook page I manage for them: https://www.facebook.com/groups/65310596576/ Come and find me and lots of great information, inspiration

takipanos
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Joined: Sat Nov 17, 2012 3:54 am
Location: Dubai

Yikes, worse than I thought. Thanks for the info. Will neem prevent leaf miners from attacking a healthy leaf?

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rainbowgardener
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It should help... I found this:

This insecticidal oil [Neem] affects the leaf miner’s natural life cycle and will reduce the number of larva that become adults and thus the number of eggs that the adults will lay. While neem oil is not an immediate way to kill leaf miners, it is a natural way to treat these pests

So you won't see them disappear immediately, but it will slow the infestation down.
Twitter account I manage for local Sierra Club: https://twitter.com/CherokeeGroupSC Facebook page I manage for them: https://www.facebook.com/groups/65310596576/ Come and find me and lots of great information, inspiration

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