Bioactive substances for pest control from high potential medicinal plants in Thailand
1992
Neungpanich Sinchaisri | Chirayuphin Chandraprasong | Vilai Santisopasri (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Entomology)
Four candidate medicinal plants were collected from the cultivated area for the base line study of the bioactive principles contained in the crude extract. These medicinal plants are, Prayong, Aglaia orodata L.; Fatalaichon, Andrographis paniculata Wall ex Nees.; Hanuman Prasarnkai, Schefflera venulosa and Takrai Horm, Cymbopogon nardus. The diamondback moth, Plutella xylostella, the key pest of crucifeous crop was used as the test material throughout the course of study. The key pathogenic fungi were supplied as test material, for instances Alternaria sp., Aspergillus sp., Colletotrichum sp., Fusarium sp., Marophomina sp., Aspergillus sp., Colletotrichum sp., Fusarium sp., Macrophomina sp., Phytophthora sp. and Sclerotium sp. etc. The result of study showed the variation of action. The active ingredient in Prayong plant is partially purified form its activity of antifeeding as well as the the growth inhibitor of several pathogenic funi in the same manner of the active principles from Takrai Horm and Hanuman Prasarnkai.
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