Author/Editor     Boh, Bojana; Košir, Iztok; Knez, Emil; Kukovič, Milena; Škerlavaj, Vojko; Škvarč, A
Title     Microencapsulation and testing of the agricultural animal repellent, Daphne
Type     članek
Source     J Microencapsul
Vol. and No.     Letnik 16, št. 2
Publication year     1999
Volume     str. 169-80
Language     eng
Abstract     The microencapsulated animal repellent Daphne was prepared by in situ polymerization of melamine-formaldehyde prepolymer with styrene-maleic acid anhydride copolymer as a modifying agent. Pure Daphne (a mixture of essential oils and other volatile compounds) and Daphne (45 wt%) diluted with isopropylmyristate (55 wt%) were used as core materials. Three types of formulations were prepared: (1) aqueous suspension concentrates, to be diluted for spraying, (2) thickened pastes with microcapsules for coating tree bark, and (3) textile, paper and metal strips, coated or impregnated with microcapsules. In field testing, all formulations with microcapsules showed a prolonged effect in comparison with non-encapsulated Daphne. The repelling effect on animals was stronger in summer and weaker in winter, when the pressure of the animals was much more intense, and diffusion of repellent from the microcapsules was reduced due to low temperatures. However, pastes for the bark and non-woven textile strips impregnated with microencapsulated Daphne showed good repelling effect against deer and rabbits in the winter period.
Descriptors     OILS, VOLATILE
PESTICIDES
AGRICULTURE
CAPSULES
CHEMISTRY, PHARMACEUTICAL
DEER
RABBITS