Controlling wood damaging insects with neem oil - or an extract with low polarity hydrocarbon, esp. effective against bark beetles

摘要

The use of an oil (A) pressed from the seeds or fruits of Azadirachta indica or Melia azederach (neem tree), opt. formulated with usual liq. carriers, for control of wood-damaging insects is new. Alternatively, an extract (A') obtd. from (A) using a low polarity hydrocarbon solvent is used. Pref. extractants for prepn. of (A') are petroleum ether or n-hexane. USE/ADVANTAGE - The treatment is esp. used to control bark beetles, e.g. of the Ips genus (e.g. I. calligraphus), Pityogenes Chalcographus or Xyloterus lineatus. (A) are natural materials with little or no toxicity towards plants and warm-blooded animals (contrast lindane and pyrethroids currently used). Active ingredients from neem tree seeds are already known for control of insects on crops,. fungi, nematodes and mites, and also for treatment of malaria, worms, skin lesions, ulcers, syphilis, snake bites and oral diseases.