Effectiveness of Various Insecticide Active Ingredients against Grey Pineapple Mealybug, Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae) on Aglaonema rotundum
Keywords:
Dysmicoccus spp., ornamental plant , pesticide , scanning electron microscopyAbstract
Grey pineapple mealybug (Dysmicoccus neobrevipes) is a significant pest in many cultived plants. This insect causes chlorotic, necrotic, and stunted growth, and yield losses. This study aimed to determine the most effective insecticides for controlling D. neobrevipes. Identification was performed morphologically and molecularly. Insecticide efficacy testing was conducted using a completely randomized design consisting of five active ingredient treatments (chlorpyrifos, carbosulfan, lambda-cyhalothrin, nitenpyram, buprofezin, and control) with three replications. The Dysmicoccus spp. on Aglaonema rotundum were identified as D. neobrevipes morphologically and molecularly. In general, insecticide treatments significantly caused mortality at the tested stages. The rate of egg hatch suppression ranged from 18.3 to 52.2% for all insecticides. Lamda-cyhalothrin and buprofezin caused the lowest mortality in the nymphal (33.3-56.7%) and adult (23.3-36,7%) stages, while nitenpyram caused the highest mortality in both nymphal and adult stages (100%). This study also described external morphological changes in D. neobrevipes adults treated with insecticides through scanning electron microscopy. In conclusion, nitenpyram showed the highest effectiveness compared to other insecticides, making it suitable to control D. neobrevipes.














