Haas, Jucelaine; Tomkiel, Michele V.; Alves, Luis Francisco A. and Fanti, André Luis P. (2010) Efeito de óleo de sementes de nim (Azadirachta indica A. Juss.) sobre Gyropsylla spegazziniana (Lizer & Trelles), na cultura da erva-mate (Ilex paraguariensis St. Hil.). [Effect of neem seed oil (Azadirachta indica) on Gyropsylla spegazziniana (Lizer & Trelles) on Paraguay tea plants (Ilex paraguariensis St. Hil.).] Revista Brasileira de Agroecologia, 5 (2), pp. 194-199.
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Document available online at: http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/article/view/9990
Summary
Gyropsylla spegazziniana (lizer & Trelles) é uma das importantes pragas da erva-mate e causa hipertrofia de folhas novas para abrigar as ninfas em galhas. O uso de inseticidas químicos na erva-mate é proibido, e assim são necessárias alternativas para o controle da praga. Este trabalho visou avaliar a ação de um produto comercial à base de óleo de sementes de nim sobre G. spegazziniana em campo. O produto foi pulverizado nas concentrações 5 e 10%. Cada tratamento constou de 3 ampolas por planta, sendo 10 plantas por tratamento. As ampolas foram pulverizadas e envoltas com tecido voile. Na testemunha, as ampolas foram somente envoltas pelo tecido. Após sete dias, avaliaram-se a emergência e mortalidade dos adultos. Verificou-se que a emergência dos adultos foi significativamente menor nas plantas tratadas com nim a 5 e 10% (14,6 e 21,6 indivíduos, respectivamente) em relação à testemunha (44,1 indivíduos). A eficiência do produto foi de 53% na maior concentração e 25% na menor. Estudos complementares devem ser realizados, porém, evidenciou-se o potencial do produto para o controle da praga.
Summary translation
Gyropsylla spegazziniana (Lizer & Trelles) is one of the important pests of the Paraguay tea (Ilex paraguariensis), and it causes hypertrophy and gall formation in new leaves where the nymph development occurs. As the use of chemical insecticides is forbidden, alternatives to the control of this insect are requested. This study aimed to evaluate the action of a commercial product based on neem seed oil on G. spegazziniana in field conditions. The product was pulverized at the 5 and 10% of concentration. Each treatment was composed by 3 galls per tree, being 10 plants per treatment. The galls were pulverized and folded with voile tissue. The control group was only folded with voile tissue. After 7 days, the galls were removed and the emergence and mortality of the adults were evaluated. The emergence of the adults was significantly lower on the plants treated with neem at 5 and 10% (14.6 e 21.6 individuals, respectively). The efficiency of the product was 53% at the higher concentration. Complementary studies should be conducted, but the potential of the product to this insect is evident.
| EPrint Type: | Journal paper |
|---|---|
| Keywords: | Psyllidae, Planta inseticida, Controle alternativo. Psyllidae, Insecticide plant, Alternative control. |
| Agrovoc keywords: | Language Value URI English agroecology http://aims.fao.org/aos/agrovoc/c_92381 English Psyllidae http://aims.fao.org/aos/agrovoc/c_27320 English Azadirachta indica http://aims.fao.org/aos/agrovoc/c_15749 English Neem oil http://aims.fao.org/aos/agrovoc/c_34063 English Ilex paraguariensis http://aims.fao.org/aos/agrovoc/c_3795 |
| Subjects: | Farming Systems Crop husbandry > Production systems > Cereals, pulses and oilseeds |
| Research affiliation: | Brazil > Other organizations |
| ISSN: | 1980-9735 |
| Related Links: | http://www.aba-agroecologia.org.br/ojs2/index.php/rbagroecologia/index |
| Deposited By: | Pinto, Gabriela Franco |
| ID Code: | 24507 |
| Deposited On: | 06 Feb 2014 13:01 |
| Last Modified: | 06 Feb 2014 13:01 |
| Document Language: | Portuguese/Portugues |
| Status: | Published |
| Refereed: | Peer-reviewed and accepted |
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