Parasitismo de ovos de Tibraca limbativentris Stål (Hemiptera: Pentatomidae) em lavoura de arroz irrigado, Eldorado do Sul, RS

Abstract

O percevejo-do-colmo, Tibraca limbativentris Stål (Hemiptera: Pentatomidae), é uma importante praga da cultura do arroz no Brasil. O presente trabalho objetivou registrar a ocorrência de parasitoides de ovos de T. limbativentris em lavoura de arroz irrigado, situada no município de Eldorado do Sul, Rio Grande do Sul. A área (603 m2) foi vistoriada semanalmente, de 21/01/2010 a 03/03/2010, coletando-se posturas do percevejo-do-colmo. Constatou-se somente a ocorrência de Telenomus podisi (Ashmead) (Hymenoptera: Platygastridae) como parasitoide de ovos, sendo o índice de parasitismo de 75%. Este é o primeiro registro de T. podisi em ovos do percevejo-do-colmo em lavouras de arroz no Rio Grande do Sul.

Selectivity of pesticides used in rice crop on Telenomus podisi and Trichogramma pretiosum

“…Fungicide sprays in rice fields predominate in the late booting stage of plants (Counce et al 2000, Sosbai 2014 of selective compounds does not affect the potential for natural parasitism of stinkbug eggs occurring after this period in the crop (Riffel et al 2010, Idalgo et al 2013. Other studies also describe the reduced effect of the fungicides Triazole and Strobilurins on adults, larvae and pupae of T. remus, in soybean crops (Carmo et al 2009 and.…”

“…Telenomus podisi Ashmead (Hymenoptera: Platygastridae) is a generalist species that parasitizes a wide range of hosts. T. podisi is among the most abundant species associated with oviposition of heteropterans in a number of crops (Pacheco & Corrêa-Ferreira 2000, Maruyama et al 2002, Godoy et al 2005, such as in eggs of Tibraca limbativentris Stal (Hemiptera: Pentatomidae) (Riffel et al 2010, Idalgo et al 2013 1. Manuscript received in Apr./2016 and accepted for publication in Sep./2016Sep./ (http://dx.doi.org/10.1590Sep./ /1983 RS, Brazil.…”

Hymenoptera associated with conilon coffee crops in Espírito Santo state, Brazil, with emphasis on the families Diapriidae, Platygastridae and Scelionidae

“…Trissolcus was most abundant in coffee with coconut (38%) and coffee with cedar (22%). In general, these two genera are associated with eggs from a large number of true bugs that damage agriculture (Laumann et al, 2010;Cingolani;Greco;Liljesthröm, 2014), presenting great potential in controlling this group of pests -i.e., Telenomus podisi Ashmead and Trissolcus basalis (Wollaston) associated with Hemiptera eggs as Tibraca limbativentris Stal that damages rice cultures (Riffel;Prando;Boff, 2010;Idalgo et al, 2013); Trissolcus urichi (Crawford) and T. podisi (Ashmead) associated with E. heros, which attacks cocoa, soy and other seasonal crops (Panizzi, 1997); Telenomus remus Nixon is a parasitoid of Spodoptera frugiperda (J.E. Smith) eggs, which is a pest that greatly damages corn crops (Bueno et al, 2008).…”

Differential induction of volatiles in rice plants by two stink bug species influence behaviour of conspecifics and their natural enemy Telenomus podisi

“…Glyphepomis spinosa Campos & Grazia (Heteroptera: Pentatomidae) is a secondary rice pest, but its increased occurrence in Brazilian rice plantations in recent years makes it a potentially dangerous pest (Alves et al, 2012). Telenomus podisi Ashmead (Hymenoptera: Platygastridae) is the most abundant egg parasitoid of stink bugs in Brazil, showing parasitism indexes of up to 75% on T. limbativentris eggs (Medeiros et al, 1997;Godoy et al, 2005;Maciel et al, 2007;Riffel et al, 2010;Idalgo et al, 2013).…”