Title Increase essential oil and dry matter yield of Lemon balm with Pluramin foliar spray under water deficitstress Type of Research Presentation Keywords Dry matter; foliar spray; Melissa officinalis; water deficit stress Abstract Dry matter; foliar spray; Melissa officinalis; water deficit stress Researchers Hamid Mohammadi (First Researcher)، Saeid Hazrati (Second Researcher)، Khalil Kariman (Third Researcher)