Abstract
Carrot (Daucus carota L.), which is one of the 10 most important vegetable crops worldwide, is an edible root vegetable desired for its taste as well as its medicinal uses. However, a fungus isolated from carrot seeds was observed to substantially decrease the germination rate. The isolate was identified as Alternaria alternata based on morphological and molecular characteristics as well as a phylogenetic tree. The maximum seed infection rate of selected carrot cultivars was approximately 60%, with the main infection site just underneath the seed shell. Additionally, the germination rate of infected seeds decreased by 28.7%. However, the seed infection rate varied among the examined carrot cultivars. Regarding the effects of chemical fungicides, the optimal treatment involved immersing seeds in amistar top suspension concentrate (SC) (effective concentration of 0.65 g/L) for 6 h, which effectively killed the fungi inside the carrot seeds. The results of this study provide a theoretical basis for the development of efficient methods for preventing the infection of carrot seeds by specific fungi and increasing the germination rate and vigour index.
Highlights
Carrot (Daucus carota L.), which is one of the 10 most important vegetable crops worldwide, is an edible root vegetable desired for its taste as well as its medicinal uses
Seeds form the basis of crop production and are vital for plant associations with microorganisms, which may be damaging to the seeds or the seedlings that germinate from infected s eeds[6]
Wang et al observed that treatments with 75% chlorothalonil, 50% thiram, or 80% carbendazim are significantly inhibitory to the pathogens infecting seeds, and that 75% chlorothalonil and 80% carbendazim can promote seed g ermination[15]
Summary
Carrot (Daucus carota L.), which is one of the 10 most important vegetable crops worldwide, is an edible root vegetable desired for its taste as well as its medicinal uses. A fungus isolated from carrot seeds was observed to substantially decrease the germination rate. The results of this study provide a theoretical basis for the development of efficient methods for preventing the infection of carrot seeds by specific fungi and increasing the germination rate and vigour index. The application of chemical pesticides is a fundamental agronomic practice regarding crop p rotection[13] Their excessive use may decrease the sensitivity of the target pathogens to these chemicals. Research involving the screening and use of chemical fungicides may result in effective methods for controlling fungal infections of seeds
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