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A cultura da soja e de forte influencia nas regioes agricolas do pais e de grande impacto na balanca comercial brasileira, sendo as perdas ocasionadas pela galha M. Javanica e M. Incognita em soja causadores de perdas em quantidade e qualidade exacerbada desse commodity, alem de inviabilizar a producao em areas produtoras, sendo presentemente utilizados, indiscriminadamente, defensivos agricolas a fim de se combater este agente, onerando assim o produtor e, consequentemente, o meio ambiente. O objetivo do estudo foi testar o uso de extrato de erva-de-santa-maria na cultura da soja, analisando os possiveis beneficios com relacao a sua eficiencia e sua aplicabilidade na reducao e multiplicacao de nematoides no solo, bem como a diminuicao do uso de defensivos e incremento na produtividade e demais caracteres biometricos. A localizacao do experimento ocorreu na casa de vegetacao no Centro Universitario de Santa Fe do Sul-SP, localizado no municipio de Santa Fe do Sul – SP cujas coordenadas sao: Latitude: 20° 12' 43'' Sul, Longitude: 50° 55' 38'' com altitude media e de 370 m, com clima, segundo Koppen, predominantemente tropical. O delineamento estatistico empregado foi o inteiramente casualizado (DIC), com cinco tratamentos (TA1-agua, TB2-0,5%, TC3-1%, TD4-5%, TE5-Marshal star) e 10 repeticoes, totalizando vasos ou unidades experimentais. Os dados foram submetidos a analise de variância no nivel de 5% de probabilidade e, quando os parâmetros foram significativos, foram comparados atraves do teste de Tukey (p <0,05). Conclui-se que, de acordo com o objetivo do trabalho, este propiciou maior reducao da populacao de nematoides. O resultado evidencia que o uso de extrato de erva-de-santa-maria e uma boa alternativa para o controle de nematoides, sendo esta uma consideravel descoberta para que se possam controlar os nematoides na cultura da soja.   MEXICAN TEA HERB EXTRAT (CHENOPODIUM AMBROSIOIDES L.) FOR ALTERNATIVE CONTROL OF SOYBEAN ROOTH KNOT NEMATODE ABSTRACT Soybean cultivation is of strong influence in agricultural regions in our country as well as having a high-impact on Brazilian trade balance, losses resulting from M.Javanica and M, Incognita in soybeans are the cause of losses in quantity and exacerbated quality of that commodity, aside from impairing the production in producing areas, currently agricultural pesticides are indiscriminately used in the furtherance of combating that agent, encumbering either the producer or the environment. This paper aims to test the use of Mexican tea on soybean cultivation, examining the possible benefits regarding to its efficiency and applicability for reduction and spread of nematode in the soil, as well as a lowering in the use of pesticides and increasing the productivity and other biometric characteristics. The greenhouse of Centro Universitario de Santa Fe do Sul-SP was the location of the experiment, its coordinates are: Latitude: 20° 12' 43'' South, Longitude: 50° 55' 38'', average height is 370m, predominantly tropical climate, according to Koppen. A completely randomized design (CRD) was performed, with five treatments (TA1-water, TB2-0,5%, TC3-1%, TD4-5%, TE5-Marshal star) and 10 sessions, totalizing vases or experimental units. The data collected were submitted to analysis of variance at 5% probability level, when the parameters were significant, they were compared by Turkey’s test (p <0,05). We conclude that, according to the aim of this paper, it propitiated a higher reduction of nematode population. The result reveals that Mexican tea extract use is a good alternative to control nematodes, thus an important discovery to prevent nematodes on soybean crops. Keywords: Alternative control. Meloidogyne. Galls.

EXTRATO DE ERVA-DE-SANTA-MARIA (CHENOPODIUM AMBROSIOIDES L.) NO CONTROLE ALTERNATIVO DE NEMATÓIDES DAS GALHAS NA SOJA