Neotropical Entomology 30(2): 317-320 (2001) Resistência do Percevejo Marrom Euschistus heros (F.) ABSTRACT -The Neotropical brown stink bug, Euschistus heros (F.), is usually controlled by organophosphate (OP) and cyclodiene (endosulfan) insecticides. Some unsuccessful control cases lead us to search for resistance to these insecticides in E. heros, the most common stink bug in the soybean growing regions of Paraná State, São Paulo State and Central Region of Brazil. Bioassays were performed with endosulfan, monocrotophos and metamidophos against adults. The most susceptible population was found in Londrina. Populations from Pedrinhas Paulista (SP) showed the highest resistance ratio (RR) to endosulfan (RR= 8.7) and metamidophos (RR=2.7); resistance to monocrotophos was detected on bugs from Centenário do Sul (PR) (RR= 3.1). Stink bugs collected from Toledo (PR), showed susceptibility to metamidophos comparable to those from Londrina.

Traps lured with semiochemical have been proposed to manage the coffee berry borer, coffee planting is however made under several environmental conditions that may affect the efficacy of traps. Several trap designs and variations were proposed and, therefore, a series of field experiments was carried out to capture coffee berry bores in traps disposed in a low density coffee plantations in the Northern part of the State of Paraná, Brazil. Traps were composed of plastic bottles (2 L) with a window (13 × 18 cm). Ethanol (E), Methanol (M) and coffee oil alone did not improve the capture when transparent traps with a 2 mm hole in the vial dispenser were used; traps lured with E : M mixtures (1:1, 1:2, 1:3) caught similar and higher number of insects than the control. There was synergism with the mixing of E and M; the addition of coffee oil to the mixtures did not improve the capture. Trap lured with E : M (1:1) mixtures at 342, 400, 428 and 710 mg caught similar numbers of insects. Transparent green trap, transparent trap and red trap lured with 642 mg day -1 of the E + M (1:1) mixture caught similar numbers of insects. Interaction between colors (transparent green, transparent and red) and semiochemical release rates (540, 720 and 1100 mg day -1 ) was observed. Transparent green trap, when lured with 720 mg day -1 of the 1 : 1 E : M mixture caught 2.3 and 4.4 times more insects than 540 and 1100 mg day -1 ; and caught 3.2 times more insects than transparent and red trap at the same release rates. Key words: semiochemical, attractant, volatile, trap color CAPTURA DA BROCA-DO-CAFÉ, HYPOTHENEMUS HAMPEI (COLEOPTERA, SCOLYTIDAE), EM RESPOSTA A CARACTERÍSTICAS DE ARMADILHASRESUMO: Armadilhas iscadas com semioquímicos têm sido propostas para manejo da broca-docafé. O cafeeiro é cultivado em condições ambientais diversas que podem afetar a eficiência das armadilhas. Vários modelos de armadilha e variações nos modelos são utilizados. Uma série de experimentos de campo objetivou avaliar capturas da broca-do-café em armadilhas numa lavoura de café semi-adensado no Norte do Paraná. Uma garrafa plástica (2 L) com uma abertura (13 × 18 cm) constituiu a armadilha. O etanol (E), metanol (M) e óleo de café, sozinhos, não incrementaram as capturas quando se utilizaram armadilhas transparentes com um frasco difusor com furo de 2 mm; armadilhas iscadas com as misturas 1 : 1, 1 : 2 e 1 : 3 de etanol (E) + metanol (M) capturaram quantidades similares e superiores à testemunha; sinergismo ocorreu pela mistura de etanol e metanol; a adição do óleo de café às misturas não incrementou as capturas. Armadilhas com taxas de liberação da mistura E:M (1:1) de 342, 400, 428 e 710 mg dia -1 capturaram quantidades similares. Armadilhas verdes transparentes, transparentes e vermelhas, iscadas com E:M (1:1) (642 mg dia -1 ) capturaram quantidades similares. Foi observada interação entre as cores (verde transparente, transparente, vermelha) e taxas de liberação dos semioquímicos (540, 720 e 1100 mg dia -1 ). Armadilhas verdes transparentes,...

-Captures of the coffee berry borer (CBB) Hypothenemus hampei (Ferrari) were assessed in traps in the fi eld. IAPAR designed traps [plastic bottles (2 L) lured with methanol:ethanol (1:1) in a vessel] were placed either at 0.5, 1.0 and 1.5m high from the ground or simultaneously tested in the 2004 fructifi cation season. Traps placed at the three heights trapped 5.5 times more CBB than the others, mostly at the traps placed at 0.5 m (75%). Treatments using the IAPAR designed trap placed at 1.2 m high; IAPAR trap with a white plastic plate above (IAPAR modifi ed I) at 1.2 m high; IAPAR at 0.5 m high and two additional vessels at 1.0 and 1.5m high (IAPAR modifi ed II) and T-163 trap [three red plastic cups (300 ml) and a red plastic plate as a cover] lured with M:E (1:1) at 1.2m height were compared in the vegetative (2005) and fructifi cation (2006) periods. IAPAR modifi ed II (dispenser vessels placed at 0.5, 1.0 and 1.5 m) trapped more beetles than the remaining types (2.72 times more beetles than IAPAR design); and IAPAR modifi ed I traps trapped more beetles than T 163 and IAPAR traps in the vegetative period. In the reproductive period, IAPAR modifi ed II trapped less beetles than IAPAR and IAPAR modifi ed I. In 2007 vegetative season, IAPAR modifi ed II trap were compared with IAPAR trap and trapped 2.8 times more beetles. The positive responses to a vertical distribution of the volatile attractants in the vegetative period of the planting allow the development of more effi cient trapping systems for CBB.

O papel das armadilhas com semioquímicos no manejo da broca-do-cafe, Hypothenemus hampeiRecebido para publicação 27/09/05 Aprovado em 07/06/06 REVISÕES / REVIEWS O papel das armadilhas com semioquímicos no manejo da broca-do- café, Hypothenemus hampeiThe role of semiochemical traps in the management of coffee berry borer Hypothenemus hampei Flávia Cloclet da Silva 1 ; Maurício Ursi Ventura 2* , Lauro Morales 3 ResumoA broca-do-café é a praga mais importante do cafeeiro. Provoca prejuízos em quantidade e qualidade da produção. Normalmente, é controlada por aplicações de inseticidas. Estratégias alternativas de manejo são necessárias principalmente pelo aumento da produção e demanda por produtos orgânicos. O uso de armadilhas para manejo da broca é revisado. A cor, o modelo da armadilha, os atraentes e as taxas de liberação são fatores diretamente relacionados com a eficiência das armadilhas. Metanol e etanol são os compostos utilizados como atraentes. Ocorrem interações entre estes fatores na atração da broca. As condições ambientais nas quais o cafeeiro é cultivado também devem influenciar as capturas. Estes aspectos podem explicar algumas diferenças em resultados de alguns estudos. Resultados conflitantes também são verificados no que se refere à eficiência das armadilhas quando utilizadas como estratégia única de controle no campo. Pesquisas adicionais devem ser incentivadas para entender com mais profundidade as interações entre a broca e a planta de café. Da mesma forma, deve-se estudar as interações dos vários fatores intrínsecos das armadilhas e destes fatores com o ambiente no qual a armadilha será instalada. O uso das armadilhas, associadas a outras estratégias de redução populacional da praga, é prática recomendável para manejo da broca. Palavras chave: Semioquímicos, manejo, atraentes, armadilhas. AbstractThe Coffee berry borer (CBB) is the most important pest in the coffee plantings. Losses are due to quality and quantity reductions. In most plantings, CBB is controlled using insecticides. Alternative management strategies are strongly demanded due to increasing production and demand for organic products. This paper revises the use of traps for CBB management. Color and trap designs, attractants and release rates are the factors directly related to trap efficiency. Methanol and ethanol mixture is used as attractant. Interactions among these factors in the CBB attraction are reported. Environment conditions under which the coffee plantings are conducted influence trap captures. These aspects may explain some differences in results for different studies. Conflicting results are also found in relation to traps efficiency when they are used as a unique control strategy in the field. Additional research may be encouraged to understand more deeply the interactions between the CBB and coffee plant. In the same way, we must study the interactions of the several intrinsic factors of the traps and the environment. The use of the trap, associated with other strategies to reduce pest population, is a recommended ...