Atividade de inseticidas sobre Spodoptera frugiperda (LEPIDOPTERA NOCTUIDAE) em laboratório

Abstract

A carcass caterpillar Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) is a polypeptide insect that causes damage to several crops, has more than 180 host species and a larval cycle of 14 to 22 days. It is an important corn pest with the potential to cause inclusive damage in hybrids that express the proteins derived from the bacterium Bacillus thuringiensis mainly in tropical regions such as Brazil. Bacillus has been the main control tactic of this pest. However, a tool is not always enough to maintain the level of damage, and thermal control is adopted to complement pest management. The present study was to evaluate the activity of some studies on the mortality of S. frugiperda larvae, in the laboratory the present study was conducted in a laboratory of defenses in the health areas of Uberlândia, was constituted by 10 treatments (Karate Zeon 250 CS , Polytrin 400/40 EC, Premio, Klorpan 480 EC, Ampligo, Nomolt 150, Verismo, Hero, Engeo Pleno) and 4 repetitions. As they were composed of Petri dishes lined with filter paper and transfered ten larvae from creation, with brush. The spraying was done using a manual in the proportion of 200 L / ha. The experiment were repeated with larvaes in L2 and L3 stages. The results were analized with variance, comparing the medias by test Scott- Knott 5%. The mortality were bigger for second instar larvaes. The efficient medias were between the inseticids lambda-cialotrina (98%), cipermetrina + profenofós (98%), clorantraniliprole (48%), clorpirifós (100%), lambda-cialotrina + tiametoxam (98%), clorantraniliprole + lambda-cialotrina (91%), teflubenzuron 48%), metaflimizona (54%), bifentrina + zeta-cipermetrina (93%).