Antagonistic Effects of Java against Plant Parasitic Nematodes

Abstract

One of the main phytonematode control alternatives is the use of antagonistic plants in crop rotation or succession systems. Although java legume shows antagonist potential to control Meloidogyne javanica, its reaction to other nematodes was not investigated so far. Thus, the aim of the current study is to assess the penetration and reproduction factor (RF) of M. incognita, Rotylenchulus reniformis and Pratylenchus brachyurus in java, using soybean as control. Plants individually inoculated with 1000 specimens from each nematode were assessed 5, 10, 15, 20, 25 and 30 days after inoculation (DAI) for nematode penetration and development. The RF was assessed under two inoculum levels of each nematode (1000 and 700 specimens) 60 days after inoculation, for M. incognita and R. reniformis; and 80 days after inoculation, for P. brachyurus. Meloidogyne incognita and R. reniformis showed lower penetration and reproduction in java (RF < 1), whereas P. brachyurus showed higher penetration and RF > 1. Thus, the java legume can be considered resistant to M. incognita and R. reniformis, as well as susceptible to P. brachyurus.

Biofumigação de substratos com espécies amazônicas para produção de mudas de cafeeiro livres do nematoide-das-galhas

“…Ao comparar os efeitos dos materiais vegetais secos e frescos na incorporação ao solo e seu efeito nematicida ao liberar os compostos presentes nas plantas, e ao procurar trabalhos que comparem a incorporação de materiais vegetais, foi observado que os testes são realizados com algumas espécies vegetais, porém sem testar a variável seco e fresco, em que Gardiano et al (2013) O Azidiractha indica, mais popularmente conhecido como neem, foi testado incoporado ao solo, e/ ou isoladamente com estrume animal, e Auwal et al (2015), relatou que o tratamento de neem+estrume não diferiu do controle químico (furadan), todavia todos os tratamentos, apresentaram menor fator de reprodução que o controle. O mesmo foi observado no experimento com objetivo de testar o antagonismo de Java (leguminosa), em que obteve Fator reprodução do M. Incognita menor que 1, que demonstra a caracteristica nematicida dessa espécie (MIAMOTO et al, 2018).…”

Macrotyloma axillare ‘Java’ and Crotalaria spp. combined with biocontrol agents for the management of Meloidogyne javanica in soybean

“…incognita and R . reniformis (Miamoto et al, 2018). The plant does not prevent nematode penetration, but it does inhibit full development inside the root system, thereby decreasing population density (Miamoto et al, 2018, 2020).…”

“…Another example is Macrotyloma axillare (E. Mey) Verdc. ‘Java’, a little‐studied legume with great potential to control root‐knot nematodes, as indicated by its resistance to Meloidogyne javanica (Treub) Chitwood and Meloidogyne incognita (Kofoid & White) Chitwood (Miamoto et al, 2016, 2018). Macrotyloma axillare ‘Java’ reduces or inhibits the formation of adult females and affects nematode development after root penetration (Miamoto et al, 2018, 2020).…”