نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه گیاهپزشکی، دانشکده کشاورزی، دانشگاه یاسوج، یاسوج، ایران
2 شرکت پاک گستر پرند، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Root-knot nematodes (Meloidogyne spp.) are among the most important plant-parasitic nematodes, widely distributed in tropical and subtropical regions. Organic and inorganic acids influence certain soil properties, such as pH, can therefore affect the reproduction and growth of soil organisms. In this study, the effects of different concentrations of Formycine® gold on the rate of ovicidal and larvicidal of M. javanica were evaluated under laboratory conditions. Initially, the effects of various concentrations of Formycine® gold on egg hatching and J2 mortality were assessed separately in the laboratory, and then the lethal concentration for 50% mortality (LC50) of J2s was determined. In greenhouse experiments, tomato seedlings grown in plastic pots containing 10 kg of growing medium at the four-leaf stage were inoculated with 10,000 nematode eggs and simultaneously soil-drenched with 20 µl of Formycine® gold at concentrations of 1950 µl/L (equivalent to LC50), 3900 µl/L (twice LC50), and 5850 µl/L (three times LC50). At a concentration of 5850 µl/L, this compound caused reductions of 26.7%, 27.9%, and 37.7%, respectively, and at 3900 µl/L, reductions of 22.3%, 21.9%, and 30.2%, respectively, in the number of galls, egg masses, and the nematode reproduction factor, compared to the inoculated control plants. Given the lack of significant differences between these two treatments, a concentration of 3900 µl/L of Formycine® gold was selected as the optimal experimental treatment for managing M. javanica and is recommended for use under greenhouse conditions.
کلیدواژهها [English]
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