チョウセンアサガオ
Research into natural pest management methods has found that extracts from Datura metel leaves present significant contact toxicity and multi-generational effects to Khapra beetles. Higher concentrations of extract led to higher mortality among the initial generation and subsequent offspring. Prolonged exposure to extreme cold and heat have demonstrated marginal impact, but most larvae were found to have survived extremes well beyond the threshold needed to kill adult beetles.