RESISTANCE INDUCTION METHOD FOR FUSARIUM OXYSPORUM F. SP. NIVEUM RACE 2

摘要

#$%^&*AU2020102086A420201008.pdf#####Abstract The present invention discloses a resistance induction method for Fusarium oxysporum f. sp. niveum race 2 (FON2). According to the technology, watermelon Fusarium wilt caused by infection of the FON2 is alleviated in a combination of a melatonin mixed solution of an optimal concentration and NaHS. A treatment concentration of the melatonin mixed solution is 20-500 pmol/L; a treatment concentration of the NaHS is 10-250 pmol/L; and a treatment manner is as follows: the melatonin mixed solution is sprayed to leaves by 0.3 L per plant, and the NaHS is irrigated to roots by 1 L per plant. The melatonin is easy to decompose under strong light, and treatment is performed in the evening. Treatment time and frequency are as follows: watermelons are treated for the first time in flowering and fruiting periods, that is an earlier stage of fusarium wilt outbreak, treated for the second time after 5 days, and then treated for the third time after 12 days. The melatonin is a natural substance in plants and is nontoxic and pollution-free. The NaHS is decomposed to release H 2S and is degradable and pollution-free. The present invention combines the melatonin mixed solution of the optimal concentration with NaHS, has three advantages of controlling the watermelon fusarium wilt, promoting plant growth and realizing environmental protection and no pollution, and facilitates wide popularization and application.Drawings of Description 100 FON2 80. 60o 40FON2+ usiwanio .00 200 0 FON2+ NaHSSO z z z Inoculated FON2 FIG. 1 -'15 a E 1 2 b Ub 96 a) 3 30 Control Melatonin Control Melatonin z FIG. 2 1