Duration of feeding and superficial and in-depth damage to soybean seed by selected species of stink bugs (Heteroptera: Pentatomidae)

Abstract

Laboratory studies were conducted to compare duration of feeding and super icial and in-depth damage to soybean (Glycine max) seeds by the Southern green stink bug, Nezara viridula (L.), the Neotropical brown stink bug, Euschistus heros (F.), the red-banded stink bug, Piezodorus guildinii (Westwood), and the green-belly stink bug, Dichelops melacanthus (Dallas). Results indicated that feeding time was signi icantly longer for N. viridula (≈ 133 min) compared to E. heros and D. melacanthus (≈ 70 min), but not different from P. guildinii (≈ 103 min). There was a positive correlation between feeding time and the resulting damage for E. heros, N. viridula and P. guildinii (R 2 > 0.80, P < 0.0001), but not for D. melacanthus (R 2 = 0.1011, P = 0.1493). The deepest seed damage (2.0 mm) was made by P. guildinii and the shallowest (0.5 mm) by D. melacanthus. The depth of the seed damage by E. heros and N. viridula (0.8, 1.2 mm, respectively) was intermediate in comparison to the other species studied. Feeding damage to the seed endosperm caused variable cell disruption and protein body dissolution, particularly when P. guildinii fed on seeds, suggesting that the deleterious action of salivary enzymes was greater for this bug compared to the others.

Monitoramento do percevejo marrom Euschistus heros (Hemiptera: Pentatomidae) por feromônio sexual em lavoura de soja

“…Predominante nas lavouras de soja no Estado de Mato Grosso, esse inseto pode ocasionar danos irreversíveis à cultura, pois, para se alimentar, suga diretamente os grãos de soja, o que acarreta redução na produção e na qualidade das sementes (Depieri & Panizzi, 2011;Silva et al, 2012 O controle das populações do inseto, muitas vezes, é realizado por meio de aplicações preventivas de inseticidas sintéticos (Bueno et al, 2013). O uso excessivo desses produtos promove a seleção de populações de percevejos resistentes, a redução dos inimigos naturais, a contaminação ambiental e riscos à saúde humana (Sosa-Gómez & Silva, 2010;Bueno et al, 2011;Belo et al, 2012).…”

Respon Genotipe Kedelai Biji Besar Dan Umur Genjah Terhadap Kompleks Hama Pengisap Polong

“…Selain kepadatan populasi hama dan stadia pertumbuhan tanaman, keragaman tingat serangan pengisap polong dipengaruhi oleh stadia perkembangan hama (Lourencao et al, 2010;Depieri & Panizzi, 2011). Menurut Arifin & Tengkano (2010), tingkat kerusakan polong dan biji akibat serangan P.…”

“…Depieri & Panizzi (2011) juga melaporkan bahwa waktu penyerangan pengisap polong berkorelasi positif dengan dampak yang ditimbulkan. Nimfa P. hybneri instar 1 tidak bergerak dan nimfa instar 2 memiliki perilaku kurang gesit sehingga tingkat kerusakan yang ditimbulkan masih sangat rendah (Arifin & Tengkano, 2010).…”

“…Sedangkan, serangan yang terjadi pada fase pengisian biji atau pemasakan polong akan menimbulkan bercak hitam kecoklatan dan penampilan keriput pada biji. Menurut Depieri & Panizzi (2011), waktu penyerangan pengisap polong berkorelasi positif dengan dampak yang ditimbulkan. Selain itu, meningkatnya pelukaan pada biji menyebabkan tertundanya umur masak tanaman (Leonard et al, 2011;Bae et al, 2014).…”

Performance of reproductive system of Dichelops melacanthus (Hemiptera: Pentatomidae) subjected to buprofezin and pyriproxyfen: morphological analysis of ovarioles and testes

“…The green-belly stink bug (Dichelops melacanthus Dallas) (Hemiptera: Pentatomidae) is an important pest of maize and wheat crops in Brazil (MANFREDI-COIMBRA et al, 2005) and occasionally occurs in the cultivation of soybean (DEPIERI;PANIZZI, 2011). This is an insect of the Neotropics that has emerged dramatically in the past two decades in southern Brazil as a result of the adoption of no-tillage systems, as the insect uses the leftover straw as a shelter (CHOCOROSQUI; PANIZZI, 2002PANIZZI, , 2004.…”