This research aims to study phytochemicals and potential of Mapok (Parinari anamense Hance) extracts to inhibit germination and growth of Barnyard grass (Echinochloa crus-galli) a common weed in the rice fields. Organic solvents extracted the part of fruits barks and leaves of Mapok included hexane ethyl acetate and methanol. Crude extracts compose of fruit hexane extract fruit ethyl acetate extract fruit methanol extract bark hexane extract bark ethyl acetate extract bark methanol extract leaves hexane extract leaves ethyl acetate extract and leave methanol extract. Crude extracts were tested of phytochemical tested of germinating inhibition root length inhibition stem length inhibition and dry weight inhibition of Barnyard grass. Leaves ethyl acetate extract showed highest inhibit germination and growth of Barnyard grass The leave ethyl acetate extract was separated by column chromatography to yield nine fractions (F1 – F9 fraction) and tested inhibit germination and growth repeating. The results showed that 1. The crude ethyl acetate extracts from the bark of Mapok at a concentration of 3000 ppm showed the highest inhibited percentage of germinating inhibition root length inhibition stem length inhibition and dry weight inhibition. 2. Fraction F8 of leaves ethyl acetate extract showed the highest inhibited percentage of germinating inhibition root length inhibition stem length inhibition and dry weight inhibition.

The Potential of food crops in the Phraek Nam Daeng community Amphawa Samut Songkhram province for food security and sustainable use of biodiversity Local plants were tested phytochemical composition antioxidant activity antimicrobial activity and nutritional analysis. The results showed that phytochemical composition of local plants most of the cardiac glycosides tannins and antraquinones. Acanthus is the highest antioxidant activity Kloe and Hnampugda respectively. Antimicrobial activity of both Gram-positive bacteria. Gram- negative bacteria and yeast is very low.The nutritional value is the maximum on each side The amount of water is Phak Protein is Acanthus Fat is Hnampugda fiber is Kloe and carbohydrate is Hnampugda.

This research is aimed to study both the species diversity and utilization of plants at the Baan Tah Tongdeang community forest Nabot Wangchao districtTak province. The survey of plant species and the available quantity has been carried out using the quadrat method. The leaders and intellectuals in the community were interviewed using a structured questionnaire. The result showed that the plant with the highest Density (D) and Relative Density (RD) were Tectona grandis L.f. (0.734375/m2 7.742998353) Xylia xylocarpa Taub. var. kerrii Nielsen (0.6875/m2 7.248764415) Grewia eriocarpa (0.65625/m2 6.919275124) respectively. Whilst plant with the highest Frequency (F) and Relative Frequency (RF) were Xylia xylocarpa Taub. var. kerrii Nielsen Grewia eriocarpa and Holoptelea integrifolia Planch. (87.5 4.96) Tectona grandis L.f. and Schleichera oleosa (Lour.) Oken (75 4.26) Pterocarpus macrocarpus Kurz and Bombax anceps Pierre (62.5 3.55) respectively. The Shannon and Wiener’s diversity index (H’) of trees was 3.38 while evenness index was 0.85. The utilization of the plants in the community included 94 species as wood (used as plank furniture firewood charcoal string chemical extraction etc. 62 species as medicinal herbs 47 species as wild vegetables fruits and foods. All of them are utilized in the community. The results of this research would be beneficial for administrative and management as a guideline to preparation a community biological database and learning resources for conservation and sustainable uses of natural resources and environments in Baan Tah Tongdeang community forest.