Induction of resistance to root-knot nematodes by SAR elicitors in tomato

Evaluation of acibenzolar-S-methyl for the control of Meloidogyne javanica and effects on the development of susceptible and resistant soybean

“…ASM is one of the most researched resistance inducers for controlling phytonematodes, and it usually significantly increases plant resistance to the parasite (Owen et al, 2002;Silva et al, 2002;Chinnasri et al, 2003;Molinari & Baser, 2010). However, the results of our study were not consistent with these findings, since only Experiment 2 showed difference between application times.…”

“…In our experiment, the ASM was evaluated only at the dose recommended by the manufacturer (0.5 g/L). However, in some pathosystems, the efficiency of ASM has been boosted by increasing the concentration applied (Chinnarsri et al, 2003;Molinari & Baser, 2010). In cowpea bean, the reduction in the numbers of Rotylenchulus reniformis Linford & Oliveira in the root system was proportional when the concentration was increased from 50 to 100 mg/L water (Chinnasri et al, 2003).…”

“…This may be due to the time required to induce the plant's resistance mechanisms, since various studies have shown that ASM does not affect hatching, survival and nematode penetration of host roots (Chinnasri et al, 2003;Salgado et al, 2007;Molinari & Baser, 2010), but it does impair nematode development and reproduction (Chinnasri et al, 2003;Molinari & Baser, 2010).…”

“…ASM was not effective in controlling Meloidogyne exigua Goeldi in coffee cultivar Catuaí 144, and no significant difference was observed between the treatments for final population, number of galls and reproduction factor variables 90 days after inoculation (Salgado et al, 2007). Some authors draw attention to the factors that could cause variations in the results obtained for inducing nematode resistance, that includes dosage, treatment timing, application method and cultivar genetic resistance (Owen et al, 1998;Owen et al, 2002;Molinari & Baser, 2010).…”

“…In cowpea bean, the reduction in the numbers of Rotylenchulus reniformis Linford & Oliveira in the root system was proportional when the concentration was increased from 50 to 100 mg/L water (Chinnasri et al, 2003). In addition to concentration, Molinari & Baser (2010) evaluated different ASM application methods to control Meloidogyne incognita (Kofoid & White) Chitwood in tomato and observed that concentrations of 180 and 360 ppm of ASM reduced the reproduction of the nematode when applied directly to the soil. However, when applied to the aerial part, only a much higher dose of ASM (5200 ppm) significantly reduced the number of eggs/g root and parasite reproduction.…”