Selectivity of insecticides used in corn culture to eggs of Spodoptera frugiperda (Lepidóptera: Noctuidae) parasites byTrichogramma pretiosum (Hymenoptera: Trichogrammatidae)
Arley Donato dos Santos, João Luís Ribeiro Ulhôa, Izacari do Nascimento Junior, Rithielle Pereira de Menezes, Ítalo José Santos de Souza
Journal Title:Revista Agraria Academica / Agrarian Academic Journal
This study aimed to evaluate the selectivity of the following insecticides: Cyptrin (cypermethrin), Lannate® (Methomyl) and Ampligo® (Lambda / Clorantraniprole) over the eggs ofSpodopterafrugiperdaJ.E. Smith, parasitized byTrichogrammapretiosumRiley.The experiment was conducted in a bioassay, where theS.frugiperdaeggs were exposed to parasitism byT.pretiosum, subsequently the insectcides and some parasitoids at the egg-larva stage were sprayed together over the eggs.The effects of the insectcides on the viability of the eggs were evaluated.The eggs used in the experiment came from the mass rearing held at the Entomology Laboratory of the InstitutoLuterano de Ensino Superior de ItumbiaraGoiás. The eggs up to 24 hours of age were adhered to a blue cardstock using arabic gum diluted to 80% with water.The cards were exposed to the parasites for a period of 48 hours and kept in a BOD chamber at 25 ± 2 ° C, RH 70 ± 10% and photoperiod of 12 hours standing for 96 hours until the evaluation of the survival of the hosts.The tests applied with theinsecticides Cyptrin and Lannate® on parasitism, the insecticides were moderately harmful (class 3) to the eggs viability.Besides, the treatment with the insecticide Ampligo® was slightly harmful (class 2) to the eggs viability.