Aspectos Biológicos e Comportamentais de Liogenys suturalis Blanchard (Coleoptera: Melolonthidae) no Mato Grosso do Sul

Abstract

Biological Notes and Behavior of Liogenys suturalis Blanchard (Coleoptera: Melolonthidae) in Mato Grosso do Sul State, BrazilABSTRACT -Liogenys suturalis Blanchard is one of the main soil pests associated to corn, wheat and oat crops in the Southern Mato Grosso do Sul State. This work aimed to investigate the bioecological and behavioral aspects of this pest. The study was carried out in several municipalities of Mato Grosso do Sul State under fi eld and laboratory conditions from August 2004 to December 2006. In the laboratory, we studied the incubation period and egg viability, the number of instars, and pupal and adult sexrelated traits. The insect distribution was determined yearly, as well as the period of insect fl ying and some behavioral aspects during mating. Egg viability averaged 81.7%, with an incubation period of 22.8 ± 4.32 days. Liogenys suturalis took the whole year to complete its life cycle, developing through three different instars. The highest larval feeding activity and development occurred in February and June, and adult fl ight activities were between the second fortnight of September and December. Sex dimorphism was observed in both pupae and adults. Flights were concentrated from 7:00 to 8:00 PM. The average time for mating was 9.82 min. The observed adult sex ratio was 0.63.

Scarabaeoidea (Insecta: Coleoptera) no Cerrado brasileiro: estado atual do conhecimento

“…O período embrionário pode chegar a 22,8 dias (SANTOS & ÁVILA, 2009a). Na maioria das espécies as larvas podem ser encontradas no solo entre os meses de novembro e março (RODRIGUES et al, 2008a;RODRIGUES et al, 2008b;PUKER et al, 2009;SANTOS & ÁVILA, 2009a;COUTINHO et al, 2011), com algumas exceções como L. fuscus e C. forsteri onde a fase larval ocorre em maior densidade entre abril e setembro (COUTINHO et al, 2011). O período larval pode durar até 269 dias como em P. fulva (RODRIGUES & FALCO, 2011).…”

“…Essas espécies sincronizam sua reprodução com a época de plantio das culturas das quais se alimentam (RODRIGUES et al, 2008a;RODRIGUES et al, 2008b;PUKER et al, 2009;SANTOS & ÁVILA, 2009a;COUTINHO et al, 2011). Durante este período, os adultos emergem do solo, preferencialmente ao anoitecer, para procurar um parceiro para o acasalamento.…”

“…A armadilha luminosa tem sido amplamente utilizada para amostrar Scarabaeoidea noturnos fototrópicos positivos, mostrando efi ciência na captura deste grupo (FLECHTMANN et al, 1995a;FLECHTMANN et al, 1995b;FLECHTMANN et al, 1995c;NUNES & FRIZZAS, 2007;BRANCO et al, 2010;ABOT et al, 2012), principalmente para estudos de dinâmica populacional (RODRIGUES et al, 2008a;RODRIGUES et al, 2008b;COSTA et al, 2009;SANTOS & ÁVILA, 2009a;RODRIGUES et al, 2010a;RODRIGUES et al, 2010b;RODRIGUES & FALCO, 2011). A armadilha de queda (pitfall) pode ser utilizada sem isca (SILVA et al, 2010) ou pode conter iscas que atraem uma gama mais específi ca de besouros denominados copronecrófagos.…”

Occurrence of adults and biological aspects of Geniates borelli Camerano (Coleoptera, Scarabaeidae, Rutelinae) in Aquidauana, MS, Brazil

“…capillata (Blanchard) (Oliveira et al 2007), Liogenys fuscus Blanchard, 1850 (Rodrigues et al 2008b), and L. suturalis Blanchard, 1851 (Santos & Ávila 2009). …”

First record of species of Liogenys (Coleoptera, Melolonthidae) associated with winter grain crops in Rio Grande do Sul (Brazil)

“…to corn, soybeans, wheat and oats has been registered mainly in Brazil (Santos & Ávila 2009). Thirty-eight species from this genus have been recorded to this country (Evans 2003;Morón 2004), of which only two are considered pests of economically important crops.…”