Natural repellants if they do work are fairly short lived unless they are refreshed often. Newer greener products should explain the "shelf life/length of efficacy" of that product. Homemade ones like mentioned were probably just the typical "that's what we've done for 50 years" approach and were best practice of the times. As far as an exterior perimeter sprays most newer pesticides are microencapsulated (you can research which ones are) and lock onto a surface once dried and will not migrate as long as they are not applied during precipitation. The pesticides that are microencapsulated will slowly breakdown and degrade in 60 to 90 days depending on which one is used. The newer class of modern pesticides are much better for the environment (if properly mixed and applied) than say what used to be such as chlordane and others that would linger around for decades on end causing problems. As always evaluate risks for your particular situation. I would be interested to see if anyone has Oddy tested whole cloves and peppercorns. JTV
________________________________________ From: [email protected] <[email protected]> on behalf of Jo Bjorkman <[email protected]> Sent: Tuesday, February 1, 2022 11:49 AM To: [email protected] Subject: RE: [PestList] Cloves and black pepper for IPM [CAUTION: This message originated from outside the Foundation. Do not click links, open attachments or take action unless you know the contents are safe] Hello Angelica, I can see this combination possibly working for rodent control, not so sure about insects. Both cloves and black pepper are used in a rodent repellant perimeter spray we are currently using around the exterior of our building. I’m interested in what the group has to say about natural deterrents, one of our buildings is located next to a protected wetland and nature preserve and we try to keep that in mind with our IPM measures. Thanks for posting the question, Jo From: [email protected] <[email protected]> On Behalf Of Angelica Isa-Adaniya Sent: Tuesday, February 1, 2022 10:33 AM To: [email protected] Subject: [PestList] Cloves and black pepper for IPM Dear all, I hope someone can help me with any known bibliography. Here in Peru a lot of conservators make packets of clove and black peppercorns (not essential oils, but the actual cloves and pepper in little bags and placed next to objects inside boxes) because they say they have deterrent properties. From personal experience and observation, this does not look like it works to me at all. I have opened various boxes with said packets where sensitive objects have been devoured. Could this be because the active repellent chemical isn't concentrated enough in these natural forms? I have not been able to find any actual experiments or scientific papers testing these two (not the oils, but the cloves and the peppercorns) and showing insect repellence or anti-feeding properties. At the very least, the Tricorynus herbarius I have all over don't look like they could be any less bothered. Are you aware of any studies? This said, some items being infested at the moment are human remains in mummy bundle form. This is mainly because there is vegetable fibre basketry, corn cobs and dried gourd plates inside the bundles with the individual. Has anybody frozen similar bundles before due to insects? Thank you very much for any pointers! All the best, Angelica Pachacamac Museum Peru -- You received this message because you are subscribed to the Google Groups "MuseumPests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]<mailto:[email protected]>. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/CAAJvYjVPEns2paABh%3Dw-tqz--WHixjVgJOnRj0-VLCBhQyTgsw%40mail.gmail.com<https://groups.google.com/d/msgid/pestlist/CAAJvYjVPEns2paABh%3Dw-tqz--WHixjVgJOnRj0-VLCBhQyTgsw%40mail.gmail.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "MuseumPests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]<mailto:[email protected]>. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/DM6PR20MB2762D801CDA2BD83FB37F34FB6269%40DM6PR20MB2762.namprd20.prod.outlook.com<https://groups.google.com/d/msgid/pestlist/DM6PR20MB2762D801CDA2BD83FB37F34FB6269%40DM6PR20MB2762.namprd20.prod.outlook.com?utm_medium=email&utm_source=footer>. -- You received this message because you are subscribed to the Google Groups "MuseumPests" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/pestlist/MN2PR20MB31205AF3F15C23AE1E717196DC269%40MN2PR20MB3120.namprd20.prod.outlook.com.
