Botanical nematicides have recently received increasing interest because of the high risks of some traditional nematicides to human health and the environment. This study evaluated the nematicidal activity of a plant volatile, trans -2-hexenal, against Meloidogyne incognita . This compound exhibited higher activity in a fumigation experiment than in the aqueous phase in vitro. Both in pot tests and in field trials, trans -2-hexenal showed significant efficacy against M. incognita while maintaining excellent plant growth, especially at doses of 1000 and 500 L ha –1, which were superior to that of abamectin at 180 g ha –1 via hole application treatment but not significantly different from fumigation with 400 kg ha –1 of dazomet. Furthermore, plants treated with 500 L ha –1 trans -2-hexenal had fruit yields 20.2 and 45% greater than the control group. On this basis, trans -2-hexenal may be a potential alternative fumigation agent for controlling M. incognita on tomato crops.
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Lu et al. (2017) studied this question.