About Neem Oil
tapla (mid-Michigan, USDA z5b-6a)
18 years ago
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notanatural
18 years agolast modified: 9 years agousername_5
18 years agolast modified: 9 years agoRelated Discussions
Question about neem oil and temperature
Comments (7)Hi woohooman, When I use Neem Oil for PM, I have only ever sprayed it in the cool of the evening. I usually wait until it is almost hard to see outside because if I spray at dusk, sometimes I still see a few bees buzzing around the plants and of course I don't want to hurt them. I have personally never noticed a problem the next morning when it gets hot. I live in San Diego east county so you know how scorching it gets out here! The neem for me has worked well on both my butternuts and by zucchs. I am just starting to see PM on my acorn squash and will spray this weekend. Would be interested in trying the baking soda or the vinegar. If it works, it would be cheaper than the Neem for sure, though the butternuts do like the Neem Oil a lot! How did your plants do with the ACV rinse?...See MoreNeem oil
Comments (2)I've used it as a leaf polish. It worked pretty well. Mainly, I wanted to get some light mineral deposits and dust off the leaves, and hopefully deter some bugs while I was at it. I actually dipped a Q tip in water, then dipped that in neem oil, and used it that way. I cleaned the leaves of Hoya kentiana, a couple pubicalyxes, and a carnosa. No ill effects, and nice shiny leaves. Obviously they were cuttings, or in the case of the kentiana, a small plant; I don't think I would've had the patience to clean a whole big plant with Q tips : )...See MoreNeem Oil for Grasshoppers and Other Pests?
Comments (12)Kelley, Bt 'kurstaki' is a narrow-spectrum bio-insecticide that targets caterpillers and larvae that bother many ornamental and vegetable plants. In a residential landscape and/or home garden, it is often used to control tomato hornworms, tobacco hornworms, cutworms, tomato fruitworms/corn earworms, canker worms, leaf miners and various types of grub worms. It is available in both a liquid form and in a powdered, granular form (Dipel Dust and similar products). I've linked one of the more common Bt Caterpiller killer type products below. Most all of the Bt 'kurstaki' products either say Worm Killer or Caterpiller Killer on the label or have images of caterpillers on the label or both. All Bt products are made of toxins derived from naturally-occurring bacteria. The other species of Bt most commonly used in a home setting are: (1) the 'San Diego' or 'tenebrionis' species-derived products (San Diego is genetically engineered so it cannot be used in Certified Organic operations, but tenebrionis is not genetically-engineered so it can be used in Certified Organic operations) which is used to control beetle larvae, and most often used to control the larval form of the Colorado Potato Beetle; and (2) the 'Israelensis' species, available as a granular product you sprinkle in standing water or as 'mosquito dunks' to drop into water. It controls mosquito larvae. One caution about using Bt 'kurstaki' is that it kills ALL butterfly and moth larvae, so be very careful when applying it so it does not wipe out all your butterflies and moths. Many butterfly gardeners choose not to use Bt 'kurstaki' because they don't want to harm the very butterflies and moths they are trying to attract to their plantings. For webworms, I usually just take a stick (or a long, telescoping pole pruner if the webs are high up in a tree) and break open the web. Once the caterpillars lose the protection of that web, the wild birds here gobble them up. I have a huge bird population here in our rural area, one I have carefully 'cultivated' by feeding them year-round, always providing numerous drinking water sources for them daily and a birdbath as well, and by providing birdhouses for them. If you are in an urban or suburban setting with a smaller population of wild birds, you may not have enough of them around to control the webworms. I think Bt is a wonderful solution if someone needs to control caterpillers, but I don't spray it myself because I like having butterflies and moths around. Some people say you can't grow fruit trees here without spraying for worms, but I've harvested over 350 lbs. of fruit from trees which were not sprayed with anything. Having said that, I don't usually have tent caterpillers (aka webworms) in large nmbers and the few I see (some years I see none) are taken care of by natural predators. I do think some parts of OK have a much more severe problem with webworms than we have here in southcentral OK. Barbara, Believe me, it has not been an easy choice to refrain from spraying insecticial soap or neem oil, and I'm not saying I'd never, ever use either one or both. For example, neem oil can be very useful in flea control, but my dogs usually don't have a big flea or tick problem, so I don't usually use it for that purpose. (I wouldn't hesitate to spray the ground in their dog yard and the fenceline around it if they did have fleas though.) In a 'bad year' I'll spray the dog yard's ground and fenceline with peppermint soap which is a great repellent. Neem is found in many pet products, including flea shampoos, and I have used those tea tree oil flea shampoos on our dogs in a year when there is a heavy infestation of fleas or ticks. (I've also bathed them in Cedarcide, orange oil-based shampoos and peppermint soap in years like that....2007 was one of those years.) Bagworms are very hard to control, but I've only seen them one year since moving here, and never since then, so I don't have to deal with them. I generally ignore leaf miners. I've never had them do enough damage to kill a plant or even to significantly harm one. The kaolin clay products like Surround are very helpful in some instances, but there again I choose not to use them. They make the garden look hideously awful, among other things, and you have to reapply it after rain or overhead watering washes it off the leaves. Kaolin clay reminds me of the old folk remedy of mixing all-purpose flour with water and spraying it on the foliage to keep the hoppers away. I used that in the bad grasshopper years back around 2003 or so, but didn't like the way the garden looked and couldn't tell it made a big dent in the amount of hopper damage I've been seeing. I didn't think it was worth the time I spent spraying. You aren't seeing a large amount of damage from pest insects because some sort of beneficials are eating them. I have seen huge numbers of insects, but not correspondingly high levels of plant damage. Potato beetles were my worst issue, and I just hand-picked them. My regular garden turtle was very frustrated that he was fenced out of the new potato patch area, and once I realized he wanted in there, I opened the gate and let him in and I haven't had to hand-pick CPBs since. Once he picked that area clean, he returned to the regular garden, leaving me to wonder how he 'knew' the CPBs (or, for that matter, the potato plants) were out there in the new area away from the main garden. If you aren't seeing significant levels of lady bugs and dragon flies, that means they've gone someplace else where there are more pest insects to eat. The first few years here, we always had billions of beneficial insects of all kinds. Then, their numbers abruptly dropped and I was sort of panicky, wondering what was 'wrong'. Finally I realized they left because there wasn't enough of a pest insect population to attract them. Now I see them come and go, appearing seemingly out of the blue if a pest population shows up like the aphids that showed up on my sugar snap peas this spring, and then leaving when their work is done. We have many wasps here, probably more than a regular homeowner would be comfortable having around. I am always happy to have them here because they are such great predators, but every time Tim walks out the door, it seems like one stings him (2 or 3 times this week alone). I suspect the many types of wasps are the reason I seldom have problems with caterpillers. You know, logic would tell you that someone with all the nightshade plants I have would have a major tomato/tobacco hornworm problem, but I see, perhaps, 8 or 10 most years and I give the wasps credit for those low numbers. It has taken me a long time to arrive at the point that I seldom rely on any sort of insecticide and there were some hard years when I worried the natural ecosystem would fail, but it never has. Dawn Here is a link that might be useful: Example of a Bt 'kurstaki' product...See MoreYank it? Leaf curl...
Comments (7)OK, so the soil is the same as last year's, amended with Black Kow, a very reputable brand of composted cow manure. The straw mulch was purchased at Lowe's. I could try removing the mulch, which I laid on very heavily. The other possibility is that my yard guy spot treated for weeds in February and some of those clippings may have been blown toward the raised beds (if so, they weren't noticeable to me. There were no clippings visible in the beds when I mulched the tomatoes with straw. Could they even be an issue if the treatment was in February? I think I need to remove the straw mulch from everything. I mulched both the raised beds and containers with it 2 weeks ago, and so far, only one plant has the curling leaves. But it could still be developing if the straw is contaminated. I am yanking the curling leaf plant. I will get another bale of straw from another supplier and hope for the best. I don't want to leave the plants unmulched. I will plant a test plant with some of the compost in a container and see if it starts to suffer this problem. But the compost will be from a different bag/batch of the Black Kow, so that won't be definitive if it results in a healthy plant. Sheesh! Problems so soon in the season...my yard guy has strict instructions not to spray any herbicides without warning me first (and he does my neighbor's yard as well). Thanks very much for all the input....See Morenotanatural
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tapla (mid-Michigan, USDA z5b-6a)Original Author