Controle químico da lagarta-enroladeira (Bonagota cranaodes Meyrick) na cultura da macieira

Abstract

A lagarta-enroladeira, Bonagota cranaodes Meyrick (Lepidoptera: Tortricidae), é considerada uma das principais pragas da macieira no Brasil. Com o objetivo de selecionar inseticidas visando ao controle do inseto, experimentos de laboratório e campo foram conduzidos com clorpirifós-etil (Lorsban 480 CE - 72 g de i.a./100 L), metidatiom (Supracid 400 - 60 g de i.a/100 L), fosmet (Imidan 50 PM - 100 g de i.a./100 L), triclorfom (Dipterex 500 - 150 g de i.a./100 L), tebufenozide (Mimic 240 SC - 21,6 g de i.a./100 L), fenitrotiom (Sumithion 500 CE - 75 g de i.a./100 L) e carbaril (Sevin 850 PM - 153 g de i.a./100 L). Todos os inseticidas provocaram 100% de mortalidade de lagartas recém-eclodidas em laboratório, porém, o controle de lagartas de 4º e 5º ínstar, após seu estabelecimento nas plantas de macieira, somente foi satisfatório com clorpirifós-etil, tebufenozide e triclorfom. A pulverização de clorpirifós-etil, após picos de captura dos machos de B. cranaodes com armadilhas de feromônio sexual resultaram em menos de 1% de frutos danificados na colheita em comparação com 4,6% com tebufenozide, e 9,8% na testemunha.

Assessment of SPLAT formulations to control Grapholita molesta (Lepidoptera: Tortricidae) in a Brazilian apple orchard

“…These results concurred with a previous study conducted by Botton et al (2000) for B. salubricola. Damage caused by Noctuidae and Geometridae was observed soon after flowering, which suggests that treatments should occur during this period (Kovaleski and Ribeiro, 2003).…”

Capacidade de parasitismo de Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) em ovos de Bonagota salubricola (Meyrick) (Lepidoptera: Tortricidae) sob diferentes temperaturas

“…

As estratégias de controle da praga dependem basicamente de inseticidas químicos (Lorenzato 1984, Kovaleski 1994, Botton et al 2000 que, devido ao hábito do inseto de se proteger no interior da folhagem (Kovaleski et al 1998

…”

Potential of Metarhizium anisopliae (Metsch.) Sorokin (Ascomycetes, hypocreales) in the control of Bonagota salubricola (Meyrick) (Lepidoptera, Tortricidae) and its compatibility with chemical insecticides

“…With the fourth instar, mortality reached 48% (Table 3), a higher rate than that observed by Botton et al (2000) with phosmet (27.7%), fenitrotion (22.2%) and methidathion (28.9%), and a lower mortality rate than with trichlorfon (80.6%), chlorpyrifos (88.8%), tebufenozide (83.3%), and carbaryl (55.6%). The selection of entomopathogenic fungi might ensure control of the apple leafroller in a more economical and safer way to humans and to the environment, as already shown with other pests and crops (Alves and Lopes, 2008), and as advocated by integrated management programmes (Way and Emden, 2000;Kovaleski and Ribeiro, 2003).…”

“…Results have shown that according to development stage of B. salubricola biological control with M. anisopliae might be an interesting alternative for B. salubricola control, since the mortality rate induced by strain E6 (82%) in first-instar larvae (Table 3) almost reached the 100% mortality rate of chemical insecticides chlorpyrifosethyl, methidathion, phosmet, trichlorfon, tebufenozide, fenitrotion, and carbaryl (Botton et al, 2000). With the fourth instar, mortality reached 48% (Table 3), a higher rate than that observed by Botton et al (2000) with phosmet (27.7%), fenitrotion (22.2%) and methidathion (28.9%), and a lower mortality rate than with trichlorfon (80.6%), chlorpyrifos (88.8%), tebufenozide (83.3%), and carbaryl (55.6%).…”