Maize leaf weevil (<i>Tanymecus dilaticollis</i>Gyll): Present situation in Romania

Georgescu, Emil

doi:10.1603/ice.2016.110355

Cited by 1 publication

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“…Romanian farmers have been confronted with attacks from different species of insects, whose populations exceed the economic damage thresholds, thus requiring the use of active substances with a long period of action, which does not happen in the case of products based on synthetic pyrethroids, which are desired to be an effective alternative following the ban on neonicotinoids. Romanian researchers have demonstrated in their studies that, for an appropriate control of soil pests in rapeseed, maize and sunflower crops, the most recommended are systemic products, which can ensure the protection of plants during the first vegetation phases [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Impact of Seed Treatment with Imidacloprid, Clothianidin and Thiamethoxam on Soil, Plants, Bees and Hive Products

Zaharia

Trotuş²,

Trașcă

et al. 2023

Agriculture

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This paper presents studies performed for the monitoring of imidacloprid, clothianidin and thiamethoxam residues applied as seed treatment in rapeseed (Brassica napus ssp. oleifera), maize (Zea mays) and sunflower crops (Helianthus annuus). The experiments were located in representative areas of the mentioned crops. Residue levels were determined in plant samples at different phenological development stages, including flowers, as well as in bees and hive products (pollen, honeycomb, honey) by liquid chromatography/tandem mass spectroscopy (LC-MS/MS). The analyses were performed in ISO 17025-accredited laboratories, referring to the limit of quantification (LOQ), characteristic of the method used to determine the residues. In 2019, the percentage of samples that contained residues of the three substances, applied to the seed, was 16.39%, representing 20 samples out of the total of 122 analyzed samples. In 2020, 10 samples contained neonicotinoid residues above the LOQ, including 5 soil samples and 5 plant samples, representing 6.17% of the total samples. In 2021, from 149 samples with neonicotinoid applied as seed treatment, residues were identified in 12 soil samples and 11 plant samples, representing 15.43% of the total number of samples. In 2022, only 12 soil samples and 1 pasture sample contained residues above the LOQ. The results show that the highest percentage of samples with residues above the LOQ was recorded by the soil samples, while the flower and bee samples had the lowest percentages of samples with residues above the LOQ; no residues of the three neonicotinoid substances were identified in the honey samples.

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Section: Introductionmentioning

confidence: 99%