RESUMO O experimento de campo foi conduzido em brotações de primavera de ‘Tangor Murcott’ para controlar o minador das folhas citros (MFC) Phyllocnistis citrella (Lepidoptera: Gracillariidae) no município de Cordeirópolis, Estado de São Paulo. Os inseticidas e respectivas concentrações (g IA/ 100 litros de água) utilizados foram: thiamethoxam 250 WG (3,0; 4,0 e 5,0), thiamethoxam (4,0) + óleo mineral (OM) 80 CE (200,0), abamectin 18 CE (0,54) + OM (200,0), lufenuron 50 CE (3,75) + OM (200,0), pyridaphention 400 CE (30,0), pyridaphention (30,0) + OM (200,0) e, OM sozinho (200,0 e 800,0). Duas aplicações foliares foram realizadas no intervalo de 10 dias. Aos 3 dias após a 1a. aplicação, abamectin + OM e lufenuron + OM, ambos considerados padrões, apresentaram as maiores mortalidades larvais do MFC, com 86,8% e 93,3% de redução, respectivamente. Na mesma data, apenas lufenuron + OM mostraram bons resultados no controle de larvas + pupas (86,2%). Para todos os tratamentos inseticidas testados, com exceção de thiamethoxam a 3,0g e 4,0g, o número de larvas por brotação foi mais baixo que a testemunha aos 7 dias após a 1a. aplicação, variando de 57,4% (OM - 200,0g) até 98,9% de redução (abamectin + OM). Nesta avaliação, abamectin + OM apresentou a maior redução populacional de P. citrella (87,2%), thiamethoxam (5,0g) alcançou razoável controle (74,0%), enquanto os tratamentos com pyridaphention foram semelhantes à testemunha com base no número de larvas + pupas. Aos 5 dias após a 2a. aplicação, somente no tratamento abamectin + OM foi registrada uma redução significativa na população larval (93,9%) e larval + pupal (95,0%). Na mesma data, lufenuron + OM mostrou significativamente menor densidade larval + pupal por brotação (75,4%). Embora thiamethoxam + OM tenha sido inferior aos inseticidas padrões aos 5 dias após a 2a. aplicação, o número de larvas do MFC foi reduzido em 63,0%. Aos 11 dias após 2a. aplicação não houve diferenças entre os tratamentos quanto ao número de larvas e de larvas + pupas. Tangor Murcott (MFC Lepidoptera (Lepidoptera Gracillariidae Cordeirópolis Paulo g IA água 25 3,0 30 0 (3,0 40 4 4, 5,0, 5,0 , 5,0) (4,0 8 200,0, 2000 200,0 200 1 0,54 054 54 (0,54 3,75 375 75 (3,75 30,0, 300 30,0 (30,0 (200, 800,0. 8000 800,0 . 800 800,0) 1a 868 86 86,8 933 93 93,3 respectivamente data 86,2%. 862 86,2% 2 (86,2%) testados 30g 0g 40g 4,0g 574 57 57,4 200,0g 2000g 989 98 9 98,9 OM. OM) avaliação P 87,2%, 872 87,2% 87 (87,2%) 5,0g 50g (5,0g 74,0%, 740 74,0% 74 (74,0%) 2a 93,9% 939 (93,9% 95,0%. 950 95,0% 95 (95,0%) 75,4%. 754 75,4% (75,4%) 630 63 63,0% 3, (3, 5, (4, 200, 20 0,5 05 (0,5 3,7 37 (3,7 30, (30, (200 800, 86, 93, 86,2 (86,2% 57, 98, 87,2 (87,2% 74,0 (74,0% 93,9 (93,9 95,0 (95,0% 75,4 (75,4% 6 63,0 (3 (4 0, (0, (30 (20 (86,2 87, (87,2 74, (74,0 (93, 95, (95,0 75, (75,4 63, ( (0 (2 (86, (87, (74, (93 (95, (75, (86 (87 (74 (9 (95 (75 (8 (7
ABSTRACT A field experiment was conducted on ‘Tangor Murcott’ spring flushes during 1999 to control citrus leafminer (CLM) Phyllocnistis citrella (Lepidoptera: Gracillariidae) in Cordeirópolis County, State of São Paulo, Brazil. Insecticides and respectively concentrations (g AI/100 liters of water) used were thiamethoxam 250 WG (3.0; 4.0 and 5.0), thiamethoxam (4.0) + petroleum oil (PO) 80EC (200.0), abamectin 18EC (0.54) + PO (200.0), lufenuron 50EC (3.75) + PO (200.0), pyridaphention 400EC (30.0), pyridaphention (30.0) + PO (200.0) and PO (200.0 and 800.0). Two foliar sprays were made at interval of ten days. Three days after the 1st application, abamectin + PO and lufenuron + PO, both considered as standards, provide significantly greater CLM larval mortality, with 86.8% and 93.3% of larval density reduction, respectively. During the same date, only lufenuron + PO showed good control of larvae + pupae (86.2%). For all insecticide treatments, with the exception of thiamethoxam at 3.0g and 4.0g, the number of larvae per flush was lower than for untreated control at 7 days after the 1st application, ranging from 57.4% (PO - 200.0g) to 98.9% of reduction (abamectin + PO). In this evaluation, abamectin + PO caused the highest reduction (87.2%), thiamethoxam (5.0) provided good control (74.0%) while pyridaphention treatments were not significantly different from the check, based on the number of CLM larvae + pupae. Five days after the 2nd application, only abamectin + PO provided significant reduction in larval (93.9%) and larval + pupal (95.0%) densities. In the same date, lufenuron + PO showed significantly lower larval + pupal density per flush (75.4% of reduction). Although thiamethoxam + PO has been inferior to standard insecticides 5 days after the 2nd application, it caused a 63% of CLM larval reduction. Eleven days after the 2nd application no significant differences in larval or larval + pupal infestation were detected among treatments. The results suggest that studies with thiamethoxam to control P. citrella should be developed at 2.0 g AI/100 liter of water or higher doses with the addition of PO. Tangor Murcott 199 (CLM Lepidoptera (Lepidoptera Gracillariidae County Paulo Brazil AI100 AI 100 AI/10 25 3.0 30 3 0 (3.0 40 4 4. 5.0, 50 5.0 , 5.0) (4.0 EC 200.0, 2000 200.0 200 0.54 054 54 (0.54 3.75 375 75 (3.75 30.0, 300 30.0 (30.0 (200. 800.0. 8000 800.0 . 800 800.0) st standards mortality 868 86 8 86.8 933 93 93.3 date 86.2%. 862 86.2% 2 (86.2%) 30g 0g 40g 4.0g 574 57 57.4 200.0g 2000g 989 98 9 98.9 PO) evaluation 87.2%, 872 87.2% 87 (87.2%) (5.0 74.0% 740 74 (74.0% check nd 93.9% 939 (93.9% 95.0% 950 95 (95.0% densities 75.4% 754 (75.4 reduction) 63 P 20 2. 19 AI10 10 AI/1 3. (3. 5. (4. 200. 0.5 05 (0.5 3.7 37 (3.7 30. (30. (200 800. 80 86. 93. 86.2 (86.2% 57. 98. 87.2 (87.2% (5. 74.0 (74.0 93.9 (93.9 95.0 (95.0 75.4 (75. 6 1 AI1 AI/ (3 (4 0. (0. (30 (20 (86.2 87. (87.2 (5 74. (74. (93. 95. (95. 75. (75 ( (0 (2 (86. (87. (74 (93 (95 (7 (86 (87 (9 (8