Kotchamon Wongyai และ Nutcharee Siri. (2019) Development of leaf curl levels on four cassava varieties infestedby pink mealybug, Phenacoccus manihoti Matile-Ferre. <i>Khon Kaen Agriculture Journal</i>, <i>47</i>(3), 479-484.Kotchamon Wongyai และ Nutcharee Siri. "Development of leaf curl levels on four cassava varieties infestedby pink mealybug, Phenacoccus manihoti Matile-Ferre". Khon Kaen Agriculture Journal 47 (2019):479-484.Kotchamon Wongyai และ Nutcharee Siri. Development of leaf curl levels on four cassava varieties infestedby pink mealybug, Phenacoccus manihoti Matile-Ferre. Faculty of Agriculture:ม.ป.ท. 2019.