There are many products on the market that claim 'neem' as an ingredient. Often, the 'neem' is combined with other insecticides and a vehicle that makes emulsification and thus delivery/application easier. If these products have used neem oil that was altered or obtained by a process other than cold-pressing, the value or effectiveness of the essential ingredient azadirachtin has likely been reduced or negated entirely. I have read reports in these & other forums about growers using products like Bio-Neem by Bonide (and others) and having less than what they consider stellar results, while I continue to use the cold-pressed product, such as is produced by Dyna-Gro, with what I consider very safe and very good results. Remember that neem oil doesn't deliver a huge initial knockdown punch, but it IS a powerful antifeedant and chemosterilizer, rendering current generations unable to feed or progress through metamorphic stages to adulthood, and rendering adults sterile. Cold-pressed neem oil is excellent on mites & works initially in the same way as hort oils work, with the added benefits of the other properties already noted. This from a recent post @ another forum site: "As I consider the prophylactic use of any insecticide, including systemics, I guess I have to say that about the only compound that fits that description for me is neem oil. I over-winter around 100 tropical plants (most are normally grown as houseplants, but my focus is on bonsai) under lights in my basement. About 2 weeks before bring them in, I apply neem oil - then again a day or two before I bring them in. Normally these applications keep insect levels in check all winter, though I may see some scale or mite populations appearing toward winter's tail. If it gets too bad, I'll do a neem application & hold out until I get the plants outdoors where the increase in the plant's metabolism and thus natural defenses, along with the increase in beneficial predators, usually completely eliminates the trouble. The bio-compounds plants use to repel plants are a by-product of the plant's metabolism. Plants with high energy reserves and plants growing with good vitality are much better protected 'naturally' from insect predation, which is why plants in low light and those that are just limping along are far more likely to be troubled by insects. I very often diagnose the occurrence of insect infestations as the end product of poor cultural conditions, and the greatest, most frequent offender is a poor soil." I'm not implying you're using a poor soil; I know you're not, but others might wish to consider the corollary. Al

I'd dispute the contention that neem oil/extracts are more toxic than fatty acid-based insecticidal soaps. ANY substance, organic or not, can be toxic if applied in great enough concentrations. Neem has been used as an herbal remedy and dietary supplement by populations in its natural locale for centuries with documented beneficial effects. The big advantage to neem oil over other organic controls is its adaptability for numerous purposes, as both an insecticide and fungicide and as an effective control of other disease pathogens. There is a very scholarly article on the pros and cons of neem oil/extracts available online, however it requires membership to the site or payment to download and view. A google search with the key words "neem oil, harmful side effects" should turn it up. Otherwise the attached is a good, well-rounded treatise on this organic control. Here is a link that might be useful: Neem oil

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

I can not stress enough how plants MUST be out of any light for at least a week after spraying with neem. I have used it even on mesembs but they were kept in a dark room away from windows and under a table afterwards. If you feel you must spray again, wait 7 days (this is how I space my applications, sometimes I do three because I'm paranoid). That's a total of 3 weeks that they are in deep shade. After the treatment, I flush the plants with water just because it makes me feel better when I reintroduce them to light. THen, here's the annoying part--I dab them with tissue paper to wick the water out of the rosettes, especially the center. Kevin is right about eggs. You can try commercially available predator mites or bacteria but they are tricky to use. Also, there are plants, especially the kind with powdery stuff on them whose name I can't remember before my morning coffee, that should not be treated with neem. Most thin-leaved succulents (that are really barely succulent), I also would not neem, like aeoniums and certain crassulas. Major cool points to you for trying neem first though, Yulia. That's not to say don't ever ever use chemical pesticides---sometimes they're the only options left. Just be careful with yourself, your plants and all the other creatures around that you don't want to maim or kill with such poisons. Being a coward about such things, I usually just throw my infested plants away first--in a bag, after soaking in soapy water for days lol I've had one adenium survive this pre-garbage treatment before. African violets, not so much. So I quit African violets. Too annoying.