RESUMOA soja (Glycine max (L.) Merrill) é uma das mais importantes culturas na economia mundial e os nematoides do gênero Meloidogyne spp. representam um dos maiores problemas enfrentados no seu cultivo. Dessa forma, objetivou-se avaliar qual é o melhor método usado no manejo de Meloidogyne javanica, utilizando nematicidas químicos e bactérias. O experimento foi conduzido em casa de vegetação sendo o delineamento experimental em blocos casualizados composto por cinco tratamentos e seis repetições: T1 (testemunha); T2 (Bacillus subtilis); T3 (Bacillus methylotrophicus); T4 (abamectina (50%)) e T5 (cadusafós). Inicialmente plantas de tomateiro foram inoculadas com suspensão contendo 1000 ovos + J2 de Meloidogyne javanica, para multiplicação por um período de 60 dias. Posteriormente, foi realizada a extração dos nematoides e inoculados em plantas de soja com 10 dias após o plantio. As avaliações dessas plantas foram realizadas 60 dias após a inoculação. Foram avaliadas as seguintes características: altura; peso fresco da parte aérea; peso seco da parte aérea; comprimento da raiz; peso fresco de raiz; número de ovos; índice de galhas e fator de reprodução. Houve diferença estatística de todos os tratamentos em relação à testemunha para as variáveis, número de ovos e fator de reprodução. Para o parâmetro peso seco da parte aérea os tratamentos Bacillus methylotrophicus, abamectina (50%) e cadusafós difeririam estatisticamente da testemunha, apresentando menor peso e as demais variáveis analisadas não diferiram estatisticamente em relação à testemunha. PALAVRAS-CHAVE: cadusafós, nematoide, reprodução. ABSTRACTThe soy (Glycine max (L.) Merrill) is one of the most important crops in the world economy and nematodes of the genus Meloidogyne spp. represent one of the biggest problems facing their cultivation. Thus, the objective was to evaluate which is the best method used in the management of Meloidogyne javanica, using chemical nematicides and bacteria. The experiment was conducted in a greenhouse, being the randomized block design composed of five treatments and six replications: T1 (witness); T2 (Bacillus subtilis); T3 (Bacillus methylotrophicus); T4 (abamectin (50%)) e T5 (cadusafos). Initially tomato plants were inoculated with suspension containing 1000 eggs + J2 of Meloidogyne javanica for multiplication over a period of 60 days. Subsequently, nematodes were extracted and inoculated in soy plants 10 days after planting. Evaluations of these plants were performed 60 days after inoculation. We evaluated the following features: height; fresh weight of shoot; dry weight of shoot; root length; fresh root weight; number of eggs; gall index and reproduction factor. There was a statistical difference of all treatments in relation to the witness for the variables, number of eggs and reproduction factor. For the dry weight of the shoot parameter, Bacillus methylotrophicus, abamectin (50%) and cadusafos treatments differed statistically from the witness, presenting lower weight and the other variables analyzed did not differ ...

The gall nematode, belonging to the genus Meloidogyne, stands out among phytomatomatoids for its rapid reproduction and adaptation in the most varied places and climates of Brazilian regions. There is a difficulty in controlling them with chemical nematicide due to the damage to human health and the environment. In this way, alternative measures to create balanced agriculture are currently being researched. One of the main alternative methods for nematode control is the use of antagonistic and non-host plants in crop rotation. This study aimed to evaluate the effect of different antagonistic plants on the population reduction of Meloidogyne javanica. The experimental design used was completely randomized, with 5 treatments and 6 repetitions, conducted in a factorial arrangement (2x5), being: T1 (Control); T2 (Crotalaria juncea); T3 (Crotalaria spectabilis); T4 (Mucuna aterrima); and T5 (Fagopyrum esculetum). Initially, the nematode was multiplied in tomato plants in a greenhouse. Subsequently, the nematodes were extracted from tomato and 1250 eggs + J2 of M. javanica were inoculated in antagonistic plants for multiplication for 60 days. The variables analyzed were length and root weight; number of eggs and juveniles in the roots; and reproduction factor. Mucuna aterrima was efficient with the lowest number of eggs and reproduction factor. In the number of juveniles, Fagopyrum esculetum and Crotalaria juncea had the lowest number, but did not differ statistically from each other.