RESUMOO presente trabalho teve como objetivo avaliar o desenvolvimento do alface e controle de nematóides após serem introduzidas doses crescentes de Bacillus subtilis ao substrato, onde posteriormente a hortaliça foi transplantada em solo infestado com nematóides do gênero Meloidogyne. O experimento foi conduzido em estufa localizada na Unoeste -Presidente Prudente -SP. O substrato recebeu doses crescentes de Bacillus subtilis formulado em pó: 0,0%, 0,5%, 1,0%, 2,0% e 4,0% correspondentes a 0,0g, 5,0g, 10,0g, 20,0g e 40,0g. Foi utilizada a cultivar de alface Vanda. Avaliou-se comprimento de raiz e massa fresca da parte aérea de 20 mudas após 32 dias, sendo que 10 mudas foram transplantadas para o solo infestado com nematóides. O uso de Bacillus subtilis foi eficiente no controle do nematóide Meloidogyne spp. A dose de 4,0% aplicada ao substrato melhorou o desenvolvimento das plantas de alface. Palavras-chave: Rizobactérias. Meloidogyne. Lactuva sativa. Hortaliças. Substrato. CONTROL BIOLOGICAL OF NEMATODES IN LETTUCE WITH Bacillus subtilis ABSTRACTThis study aimed to evaluate the development of lettuce and control of nematodes after being introduced increasing doses of Bacillus subtilis the substrate where later the vegetable was transplanted into soil infested with nematodes of the genus Meloidogyne. The experiment was conducted in a greenhouse located in Unoeste -Presidente Prudente -SP. The substrate received increasing doses of Bacillus subtilis powder: 0.0% , 0.5 %, 1.0 %, 2.0 % and 4.0 % corresponding to 0,0g , 5.0g , 10.0g , 20,0g and 40,0g . It was used to grow lettuce Vanda. We evaluated the length of root and shoot fresh weight of 20 seedlings after 32 days, and 10 seedlings were transplanted into soil infested with nematodes. The use of Bacillus subtilis was efficient in the control of Meloidogyne spp. The dose of 4.0% applied to the substrate improved the development of lettuce plants.
RESUMOA Brachiaria spp. assim como outras forrageiras, são destinadas principalmente para pastejo, corte, conservação do solo ou uso direto para produção de sementes, na qual é necessária para suprir a cadeira produtiva. Porém o elevado índice de dormência nas sementes de gramíneas e o ataque de fungos dificultam a germinação dessas espécies. Sendo assim, o objetivo deste trabalho foi avaliar a germinação das sementes de Urochloa brizantha, c.v. Marandu, após escarificação mecânica e tratamento com fungicida. O experimento foi conduzido na unidade de beneficiamento de sementes e laboratório de análise de sementes localizado em Presidente Prudente/SP. Avaliou-se a germinação e os valores obtidos foram submetidos à análise de variância e teste de médias usandoTukey, ao nível de 5% de probabilidade. Concluiu-se que, sementes não escarificadas tratadas com fungicida melhoram a germinação das sementes de Urochloa brizantha cv. Marandu. Palavras-chave: Forrageira. Escarificação. Dormência. Brachiaria spp. Tetrazólio. GERMINATION OF Urochloa brizantha CV. MARANDU AFTER TREATMENT OF SEEDS WITH FUNGICIDE AND MECHANICAL SCARIFICATION ABSTRACTBrachiaria spp. as well as other forages, are mainly intended for grazing, cutting, soil conservation or direct use for seed production, in which it is necessary to supply the productive chair. However, the high dormancy index in grass seeds and the fungus attack make the germination of these species difficult. Therefore, the objective of this work was to evaluate the germination of the seeds of Urochloa brizantha, c.v. Marandu, after mechanical scarification and treatment with fungicide. The experiment was conducted at the seed processing unit and seed analysis laboratory located in Presidente Prudente / SP. The germination was evaluated and the values obtained were submitted to analysis of variance and test of means using Tukey, at the level of 5% of probability. It was concluded that non-scarified seeds treated with fungicide improved the germination of the seeds of Urochloa brizantha cv. Marandu.
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