Toxicity and Anti-feeding effect of Aesculushippocastanum, Thymus daenensis, Artemisia abrotanum, and Chrozophora tinctoria on Sitophillus oryzae.

Background and aim: The approach of food storage, especially cereals and basic human food sources, has long been considered as a problem to combat storage pests. the use of plant compounds has been suggested by researchers as an alternative to phosphine in the fight against pests.In this study, four plants such as Aesculushippocastanum, Thymus daenensis, Artemisia abrotanum and Chrozophoratinctoria were evaluated based on their deadly and repellent properties of pests and insectsconsidering Iranian medicine sources. Materials and methods: First, plant extracts were prepared by ethanol solvent method and then, their lethal and Anti-feeding experiments were performed on rice insects (Sitophylusoryzae) in standard laboratory conditions.
Results: Extracts of Thymus daenensis, Aesculushippocastanum, Artemisia abrotanum and Chrozophoratinctoria were estimated to be 553.2, 753.6, 878.3 and 987.3 mg / ml effective dose, respectively.The results showed that Thymus daenensis extract with 90.33% with lower concentration compared to Aesculushippocastanum, Artemisia abrotanum and Chrozophoratinctoria extracts has the highest lethal effect against S. oryzae. Also in Anti-feedingtest, Thymus daenensis extract showed the highest Anti-feedingeffect in comparison with Aesculushippocastanum, Artemisia abrotanum and Chrozophoratinctoria extracts, respectively. Conclusions: The use of plants in the control against storage pests such as rice weevils will have favorable environmental results, human health and less storage is dangerous. © Springer Nature Switzerland AG 2021.