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

Abstract

The aim of this study was to evaluate the activity of elicitor, acibenzolar-S-methyl (ASM), in inducing resistance to Meloidogyne javanica in soybean and in enhancing plant development. Plantlets of the soybean susceptible cultivar BRSMT-Pintado and the resistant cultivar MG/BR 46 Conquista were treated with ASM (0.5 g/L) at three different times: seven days before, one day before and seven days after inoculation with 2000 eggs/plant. Untreated inoculated plants and untreated non-inoculated plants were used as controls. Sixty days after inoculation, the number of galls, eggs/g root and vegetative parameters (height, aerial part fresh and dry mass and root fresh mass) were evaluated. The experiments were conducted over two different periods (Experiments 1 and 2). Only in Experiment 2 treatment "seven days before inoculation" reduced the number of eggs/g root, irrespective of the cultivar evaluated, but the number of galls was not affected. Stronger plant development was observed in the susceptible soybean cultivar treated seven days before inoculation in Experiment 2.

Systemic acquired resistance activation in solanaceous crops as a management strategy against root‐knot nematodes

“…In contrast, SA sprayed onto tomato leaves did not produce effects on root defence to nematodes, as has already been reported . SA foliar application was reported to be successful only in okra and cowpea .…”

“…Generally, reports on BTH effects on nematode infections are contradictory . In most of the reported studies, BTH is provided to plants by foliar spray . In the present study, foliar treatments with dosages as high as phytotoxic thresholds did not affect M. incognita infection.…”

“…In the present study, foliar treatments with dosages as high as phytotoxic thresholds did not affect M. incognita infection. Similarly, foliar treatments with BTH were not effective in reducing RKN infection in tomato, soybean and coffee . Conversely, BTH foliar applications seem to be effective against RKNs on pineapple, grapevines and potato …”

“…Recently, SA application was proven to induce overexpression of the PR genes involved in SAR, both in roots and shoots of tomato; SAR activation was associated with a marked inhibition of RKN infection . Although evidence of the role of SA applications in chemically induced resistance to RKNs is accumulating, reports on the effectiveness of BTH are contradictory, and those on INA are very scarce …”

Influence of Rocksil®, Silifort® and Wollastonite on Penetration and Development of Meloidogyne javanica in Poaceae and Fabaceae

“…; Puerari et al. , ). However, further studies are needed to elucidate the full potential of Si treatment, as variations in solubility and Si content could reveal differences in Si absorption by plants and trigger defence mechanisms, as well as differential responses of the nematode and plant.…”