Abstract
ABSTRACT Mixture of antagonist agents and form of application may influence in the control of root-knot nematodes. Thus, the aim of this work was to study the action of a biological product based on enzyme mixtures, Bacillus sp. and Trichoderma sp., at different concentrations on hatching, motility, mortality and reproduction of Meloidogyne incognita in tomato, considering two ways of application of the product. Eggs and second-stage juveniles (J2) of M. incognita were placed in biological product solutions at concentrations: 0, 1.25, 2.5, 5, 10, 20 and 40 g L-1. The same concentrations were applied to planting pits or to the soil surface. Afterwards, 3,692 eggs of M. incognita were inoculated in tomato crop. A significant reduction in J2 hatching of M. incognita J2 was observed in the highest concentrations and higher mortality of J2 from concentration of 5 g L-1. The interaction between concentrations and form of application of the product significantly influenced the infectivity and reproduction of M. incognita. Greater root system mass was obtained by applying the biological product to the surface, regardless of concentration.
Highlights
Formas de aplicação e modo de ação de biocontrolador no manejo de Meloidogyne incognita em tomateiro
In vitro trials Only the concentrations of 20 and 40 g L-1 of biocontroller product caused a significant reduction in hatching of M. incognita J2, comparing with the control (Figure 1A)
Motility inferior to 0.17% was observed in J2 exposed to concentrations starting from 5.0 g L-1 (Figure 1B)
Summary
Formas de aplicação e modo de ação de biocontrolador no manejo de Meloidogyne incognita em tomateiro. Este trabalho teve como objetivo estudar a ação de um produto biológico à base de mistura de enzimas, espécies de Bacillus e Trichoderma em diferentes concentrações sobre a eclosão, a motilidade, a mortalidade e a reprodução de Meloidogyne incognita em tomateiro, sob duas formas de aplicação do produto. Root-knot nematode species are considered limiting factors and of great economic importance in horticulture sector in tropical and subtropical countries (Hallmann & Meressa, 2018). Among these species, M. incognita stands out for high dissemination, due to its wide range of hosts, estimating yield losses of 37.4% in tomato crop (Solanum lycopersicum) (Hema & Khanna, 2018). Studying the commercial product resulting from the enzyme mixture (proteases) and antagonistic agents (B. subtilis, B. licheniformes and Trichoderma longibrachiatum), Silva et al (2017)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
