POTENTIAL RISK OF LOSSES IN MAIZE CAUSED BY Dichelops melacanthus (DALLAS) (HEMIPTERA: PENTATOMIDAE) IN BRAZIL

ABSTRACT: The incidence of the green belly stink bug, Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae),on maize crop in Brazil has increased with time, especially due to the continuous availability of food throughout theyear. This insect causes injury to seedlings, killing them shortly after their emergence from the soil. If the plant survives,it is possible to see areas with necrotic lesion that increase in a transverse pattern on the sheet, with perforations on theleaves or tillers (side shoots). This pest is currently one of the most important to maize, in conventional and Bt hybrids.The research compared the behavior of theses cultivars infested by the green belly stink bug, D. melacanthus. Bt andconventional maize cultivars were evaluated in a protected environment (greenhouse) and only Bt maize was evaluatedat field. Evaluations based on plant development and insect injury occurred after seven days of the infestation period.The results indicated variability among cultivars related to insect infestation, measured by a visual scale for damagedetermination and plant development. Grain yield obtained from infested plots was 6352.2 kg ha-1 whereas in the noninfestedplots was 8048.05 kg ha-1, equivalent to an average reduction of 21.07%.Keywords: Plant damage, grain losses, green belly stink bug.RISCO POTENCIAL DE PERDAS CAUSADAS POR Dichelops melacanthus (DALLAS)(HEMIPTERA: PENTATOMIDAE) EM MILHO NO BRASILRESUMO - A incidência do percevejo barriga verde Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae)em milho no Brasil tem aumentado nos últimos anos, especialmente devido à disponibilidade de alimento o ano todo.A injuria provocada pelo inseto pode causar a morte da plântula reduzindo o número ideal de plantas na colheita.Se a planta sobrevive, é possível visualizar áreas necrosadas ou perfilhamento. A praga é atualmente uma das maisimportantes do milho, tanto em cultivares convencionais como em cultivares Bt. A presente pesquisa comparou ocomportamento destas cultivares em ambiente protegido (casa de vegetação) e no campo, avaliando a injuria provocadapela praga, o desenvolvimento da planta e a produtividade de grãos (campo). Os resultados indicaram variabilidadeentre cultivares em relação à injuria e ao desenvolvimento da planta. O rendimento de grãos nas parcelas infestadasfoi 6352,2 kgha-1 enquanto que nas parcelas sem infestação a produtividade foi 8048,05 kgha-1, o equivalente a umaredução média de 21,07%.Palavras-chave: Danos, perdas em rendimento de grãos, percevejo barriga-verde.

Download Full-text

POTENTIAL RISK OF LOSSES IN MAIZE CAUSED BY Dichelops melacanthus (DALLAS) (HEMIPTERA: PENTATOMIDAE) IN BRAZIL

Revista Brasileira de Milho e Sorgo ◽

10.18512/1980-6477/rbms.v15n3p386-397 ◽

2016 ◽

Vol 15 (3) ◽

pp. 386 ◽

Cited By ~ 2

Author(s):

IVAN CRUZ ◽

RODOLFO BIANCO ◽

ANA CAROLINA MACIEL REDOAN

Keyword(s):

Plant Development ◽

Necrotic Lesion ◽

Stink Bug ◽

Insect Infestation ◽

Bt Maize ◽

Maize Crop ◽

Maize Cultivars ◽

Heteroptera Pentatomidae ◽

Transverse Pattern ◽

Grain Losses

ABSTRACT: The incidence of the green belly stink bug, Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae), on maize crop in Brazil has increased with time, especially due to the continuous availability of food throughout theyear. This insect causes injury to seedlings, killing them shortly after their emergence from the soil. If the plant survives,it is possible to see areas with necrotic lesion that increase in a transverse pattern on the sheet, with perforations on the leaves or tillers (side shoots). This pest is currently one of the most important to maize, in conventional and Bt hybrids. The research compared the behavior of theses cultivars infested by the green belly stink bug, D. melacanthus. Bt and conventional maize cultivars were evaluated in a protected environment (greenhouse) and only Bt maize was evaluated at field. Evaluations based on plant development and insect injury occurred after seven days of the infestation period. The results indicated variability among cultivars related to insect infestation, measured by a visual scale for damage determination and plant development. Grain yield obtained from infested plots was 6352.2 kg ha-1 whereas in the noninfested plots was 8048.05 kg ha-1, equivalent to an average reduction of 21.07%.Keywords: Plant damage, grain losses, green belly stink bug. RISCO POTENCIAL DE PERDAS CAUSADAS POR Dichelops melacanthus (DALLAS)(HEMIPTERA: PENTATOMIDAE) EM MILHO NO BRASIL RESUMO - A incidência do percevejo barriga verde Dichelops melacanthus (Dallas) (Heteroptera: Pentatomidae) em milho no Brasil tem aumentado nos últimos anos, especialmente devido à disponibilidade de alimento o ano todo. A injuria provocada pelo inseto pode causar a morte da plântula reduzindo o número ideal de plantas na colheita. Se a planta sobrevive, é possível visualizar áreas necrosadas ou perfilhamento. A praga é atualmente uma das mais importantes do milho, tanto em cultivares convencionais como em cultivares Bt. A presente pesquisa comparou o comportamento destas cultivares em ambiente protegido (casa de vegetação) e no campo, avaliando a injuria provocada pela praga, o desenvolvimento da planta e a produtividade de grãos (campo). Os resultados indicaram variabilidade entre cultivares em relação à injuria e ao desenvolvimento da planta. O rendimento de grãos nas parcelas infestadas foi 6352,2 kgha-1 enquanto que nas parcelas sem infestação a produtividade foi 8048,05 kgha-1, o equivalente a uma redução média de 21,07%. Palavras-chave: Danos, perdas em rendimento de grãos, percevejo barriga-verde.

Download Full-text

Identification of Nymphal Instars of Mecidea major Sailer and Mecidea minor Ruckes (Hemiptera: Heteroptera: Pentatomidae: Mecideini) from the Southwestern and Central United States

Zootaxa ◽

10.11646/zootaxa.4958.1.28 ◽

2021 ◽

Vol 4958 (1) ◽

pp. 479-488

Author(s):

J. E. MCPHERSON ◽

C. SCOTT BUNDY

Keyword(s):

United States ◽

Life Histories ◽

South Florida ◽

Immature Stages ◽

Stink Bug ◽

Laboratory Rearing ◽

Central United States ◽

Heteroptera Pentatomidae

The mecideine stink bug genus Mecidea is represented in America north of Mexico by three species: Mecidea major Sailor, Mecidea minor Ruckes, and Mecidea longula Stål. M. major and M. minor are widely distributed, occurring collectively from the Midwest to California. M. longula is known only from south Florida. The life histories of M. major and M. minor have been published including laboratory rearing from egg to adult and descriptions of the immature stages. However, no key has been developed for identification of the nymphs of these two species. Here, we present a key to the nymphs of these taxa to the species and instar levels.

Download Full-text

Relationship Between Community Structure and Southern Green Stink Bug (Heteroptera: Pentatomidae) Damage in Macadamia Nuts

Environmental Entomology ◽

10.1603/0046-225x-30.6.1028 ◽

2001 ◽

Vol 30 (6) ◽

pp. 1028-1035 ◽

Cited By ~ 19

Author(s):

Vincent P. Jones ◽

Daphne M. Westcott ◽

Naomi N. Finson ◽

Roy K. Nishimoto

Keyword(s):

Community Structure ◽

Stink Bug ◽

Southern Green Stink Bug ◽

Green Stink Bug ◽

Heteroptera Pentatomidae ◽

Macadamia Nuts

Download Full-text

Nutritional States of Post-Overwintering Adults of the Brown-Marmorated Stink Bug, Halyomorpha halys (Stål) (Heteroptera: Pentatomidae)

Japanese Journal of Applied Entomology and Zoology ◽

10.1303/jjaez.2012.12 ◽

2012 ◽

Vol 56 (1) ◽

pp. 12-15 ◽

Cited By ~ 12

Author(s):

Ken Funayama

Keyword(s):

Halyomorpha Halys ◽

Brown Marmorated Stink Bug ◽

Stink Bug ◽

Heteroptera Pentatomidae

Download Full-text

Small Rice Stink Bug, Oebalus poecilus (Dallas) (Hemiptera: Heteroptera: Pentatomidae)

10.1007/springerreference_89377 ◽

2012 ◽

Keyword(s):

Stink Bug ◽

Heteroptera Pentatomidae ◽

Rice Stink Bug

Download Full-text

Southern Green Stink Bug, Nezara viridula (L.) (Hemiptera: Heteroptera: Pentatomidae)

10.1007/springerreference_89426 ◽

2012 ◽

Keyword(s):

Nezara Viridula ◽

Stink Bug ◽

Southern Green Stink Bug ◽

Green Stink Bug ◽

Heteroptera Pentatomidae

Download Full-text

Effects of Essential Oils from Two Species of Piperaceae on Parasitized and Unparasitized Eggs of Oebalus insularis (Heteroptera: Pentatomidae) by Telenomus podisi (Hymenoptera: Platygastridae)

Natural Product Communications ◽

10.1177/1934578x1901400122 ◽

2019 ◽

Vol 14 (1) ◽

pp. 1934578X1901400

Author(s):

Bruno Zachrisson ◽

Ana Santana ◽

Mahabir Gupta

Keyword(s):

Biological Control ◽

Essential Oils ◽

Exposure Time ◽

Stink Bug ◽

Insect Eggs ◽

Heteroptera Pentatomidae ◽

Telenomus Podisi ◽

Rice Stink Bug

Biological control of Oebalus insularis eggs is considered an important strategy in the control of this rice “stink bug”. Effects of essential oils (EOs) from Piper jacquemontianum Kunth and Piper marginatum Jacq. (Piperaceae) on the viability of parasitized and unparasitized eggs by Telenomus podisi, in concentrations of 0.5 to 2.0%, were evaluated. EOs from both species at a concentration of 2% affected the development of embryons of O. insularis as well as of T. podisi after 24 and 48h of their administration. In both species, P. jacquemontanium and P. marginatum LC50, 24 h before the application of treatments on eggs of O. insularis was 3.835 y 3.037, respectively. LC50 after 48 h of treatment with EOs showed contrasting results which varied from 2.207 and 1.811. for P. jacquemontianum and P. marginatum, respectively. LC50 calculated before 24 h in parasitized eggs of O. insularis by T. podisi, was 3.037 and 2.171 for P. jacquemontianum y P. marginatum, respectively, while after 48h of treatment it was 1.166 y 1.935, respectively. Absorption of the EO components by the unparasitized and parasitized eggs of O. insularis by T. podisi was higher after 48 h of exposition. This is due to the longer exposure time, which allows higher penetration of the EOs into the interior of insect eggs by microscopic pores and micropyle.

Download Full-text