Production of wood vinegars from coconut shells and additional materials for control of termite workers, Odontotermes sp. and striped mealy bugs, Ferrisia virgata

Songklanakarin Journal of Science and Technology (SJST)

关键词: wood vinegar;    coconut shell and coir;    termiticide;    pesticide;    bioresource;   

DOI  :  

来源: DOAJ

【 摘 要 】

Coconut shells and coir are considered as wastes of coconut based products that have not been utilized efficiently.By using these abundant bioresources, which are widely available in Thailand, as raw materials, we were able to producewood vinegars that may be alternatives to termiticides and pesticides. The wood vinegars were obtained from carbonizationprocess using a 200-liter fuel tank as charcoal brazier under temperatures of 300-400°C. In this study, termiticidal and pesticidalactivities of wood vinegars were evaluated against termite workers, Odontotermes sp., and striped mealy bugs, Ferrisiavirgata, using direct contact application. Percent mortalities in the experiments were recorded after 24 hours and correctedfor control mortality with Abbott’s formula. Wood vinegars of 850, 696, and 898 milliliters were produced from coconut shell(wood vinegar A) and the mixture of coconut shell and coir (wood vinegar B) and the mixture of coconut shell, coir and holybasil (wood vinegar C), respectively. Wood vinegar A exhibited high termiticidal activity against termite workers at a dilutionof 1:50, wood vinegar: sterile water (v/v). By this way, 85% (81.71% corrected mortality) of termite workers were killed afterthe 24 hours of test. At a dilution of 1:10, both wood vinegar A and B had exhibited high pesticidal activities against mealybugs, 96% (95.12% corrected mortality) of striped mealy bugs were killed by those wood vinegars. In the weakest termiticidaland pesticidal activities, wood vinegar C was able to kill 60% (51.22% corrected mortality) of termite workers at a dilution of1:50 within 24 hours. Also it killed 93% (91.89% corrected mortality) of striped mealy bugs with a dilution of 1:10 (v/v) withinthe same amount of time. Post-hoc comparisons (Tukey test) revealed that wood vinegar A possessed the most effectivetermiticidal activity against termite workers. However, a similarity in high pesticidal activity was found among three woodvinegars against striped mealy bugs. The termiticidal and pesticidal properties of these wood vinegars can be attributed to themode of action of their active components.

【 授权许可】

Unknown