288 one day old chicks were collected and randomized in to 6 treatments: T1: control without Diterpen Lacton powder (DLP) and antibiotic; T2, T3, T4, T5: as control plus 0.15, 0.3, 0.45, 0.6% DLD; T6: as control plus 100ppm oxytetracycline + 50ppm tylosine; 12 head/pen, 4 pens/treatment).

The andrographis paniculata samples with more than 8.5% Diterpen lacton (DL) compounds was collected to research on anti-bacterial as well as immune responses. Based on the results, the process of DL extracting from andrographis paniculata and the production process of DL powder were established to produce the DL product.

The thesis “Identification of virus belong to Begomovirus genus infected Tomato yellow leaf curl disease (TYLCD) in Lam Dong province” was carried out from April 2009 to December 2010 at the Department of Biotechnology, Institute of Agricultural Sciences for Southern Vietnam. The aims of the study were to identify the virus belong to Begomovirus genus which infect yellow leaf curl disease on tomato in Lam Dong province.