%0 Journal Article
%T Modo de aplica£¿£¿o e efici¨ºncia de inseticidas granulados sist¨ºmicos para o controle de cigarras (Hemiptera: Cicadidae) do cafeeiro
%A Martinelli
%A Nilza M.
%A Matuo
%A Tomomassa
%A Yamada
%A Meire R.
%A Malheiros
%A Euclides B.
%J Anais da Sociedade Entomol¨®gica do Brasil
%D 1998
%I Scientific Electronic Library Online
%R 10.1590/S0301-80591998000100017
%X the influence of application methods on the efficacy of granular systemic insecticides used in the control of quesada gigas (olivier) and dorisiana drewseni (st£¿l) attacking coffee (coffea arabica) trees was studied. the trial was set up in a 6 years-old coffee cv. "mundo novo" plantation, planted in 3.5 x 1.5 m spacing, during 1992/1993. the experimental design used was randomized blocks, with 21 treatments replicated 4 times, each with 5 plants/ plot. the insecticides triadimenol + disulfoton 1.5% + 7.5% (26 g/tree), aldicarb 150g (10.0 g /tree), ethoprophos 100g (30.0 g/tree), phorate 5g ( 80.0 g/tree) and terbufos 5g (40.0 g/tree) were applied using four methods: manually operated knapsack applicator mebuki tf8; throwing manually a mugfull of granules on the top of the canopy; tractor powered granule applicator, kamaq ck2-ag, applying in furrow under the canopy; and in furrow manual application of granules. assessment of control was carried out counting live nymphs at 70, 105 and 140 days after application, in a pit measuring 50 x 50 x 50 cm made underneath the plant canopy. the application method using the knapsack applicator and the mug showed to be the most effective (86.0 - 93.5% and 76.8 - 86.7%, respectively); application by tractor and in furrow under canopy afforded variable efficiency according to the chemical used; the performance of terbufos was the highest in reducing (98.2 - 100%) the cicadas population. phorate (79.6 - 99.1%) and the mixture triadimenol + disulfoton (82.3 - 97.3%) were also effective, similar to terbufos; aldicarb gave a satisfactory control (68.1 - 85.0%) according to the application method and ethoprophos, did not control well the cicadas when applied with knapsack (58.4%), manually (45.1%) and in furrow (31.5%).
%K insecta
%K cicadidae
%K chemical control
%K coffee
%K coffea arabica.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0301-80591998000100017&lng=en&nrm=iso&tlng=en