Effect of Heating by Microwave Oven on Weeds Seed Germination in Imported Shipments

Kamel, Enas

doi:10.21608/agro.2021.77144.1259

Cited by 1 publication

(1 citation statement)

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“…The authors demonstrated that unprotected wet seeds of common ragweed died off completely when they were exposed to 60 • C for 6 h. Even though similar treatment and analyzing methods were used, results deviate significantly from our findings. Another study was introduced by [32] testing the heat resistance of seeds of the related species giant ragweed (Ambrosia trifida). The author used microwave treatments for 10 and 15 min and demonstrated that all of the seeds of the species were killed, irrespective of the microwave power (24-150 • C).…”

Section: Discussionmentioning

confidence: 99%

Heat Treatment of Seeds to Control Invasive Common Ragweed (Ambrosia artemisiifolia), Narrow-Leaved Ragwort (Senecio inaequidens) and Giant Hogweed (Heracleum mantegazzianum)

Hall,

Urban,

Durec

et al. 2024

Plants

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The intended or unintentional transport of soil material contaminated with weed seeds is one of the most important drivers in the spreading dynamics of invasive alien plants (IAPs). This phenomenon can be observed at any kind of construction site. Typical transfer of soil contaminated with IAP seeds can be observed along with road construction (soil translocation) or road maintenance services (deposit of mown plant biomass). Thus, an effective inactivation of these seeds by heating can avoid the spread of IAPs substantially. In the present study, the effects of various thermal control techniques (dry air heating and wet heating with hot steam, hot water, and hot foam) on seed survival of the widespread European IAPs common ragweed (Ambrosia artemisiifolia), narrow-leaved ragwort (Senecio inaequidens), and giant hogweed (Heracleum mantegazzianum) are discussed. Dry and wet seeds which were either uncovered or covered with soil were tested for survival at different treatment temperatures and different exposure times. Results revealed that particularly dry seeds of all three species could withstand temperatures of 100 °C for at least 6 h in climate chambers. Dry seeds of common ragweed and narrow-leaved ragwort survived exposure times of up to 48 h. Wet seeds were significantly more susceptible to heat treatments. Giant hogweed seeds were completely killed after 12 h at 70 °C. The exposure of IAP seeds to hot water was generally more effective than the treatment with hot steam. The treatment with hot foam was only effective when seeds were lying unprotected on the soil surface. Dry seeds of all the three species survived hot foam application in the field when they were covered by vegetation and leaf litter or soil. Due to the robustness of the seeds, a preventive management of IAPs by an efficient control before seeds formation is substantial to avoid their further dispersal.

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Section: Discussionmentioning

confidence: 99%