Of all the insect pests threatening fruit tree cultivation, the Mediterranean fruit fly, Ceratitis capitata, is considered one of the most damaging species, particularly for citrus and peach trees in Mediterranean countries.The main objective of this work is to evaluate the antifungal and insecticidal activity of the essential oils of Achillea millefolium (Asteraceae) and Chrysanthemum coronarium (Asteraceae) against the pests of orange, Citrus sinensis,namely the insect Ceratitis capitata and the pathogenic fungi that accompany it.The essential oils of the two plants used were extracted using a Clevenger-type apparatus. Their antifungal activity was tested by radial culture and their insecticidal activity by fumigation.All essential oils exhibited antifungal activity against Aspergillus niger, Fusarium sp1, Penicillium sp, and Fusarium sp2 at the highest concentration (5 µL/mlair). Achillea millefolium essential oil induced 100% mortality after 24 hours of exposure in adult Ceratitis capitata pests. However, for Chrysanthemum coronarium essential oil, larvae were the most affected stage, reaching approximately 35% mortality at the dose (5 µL/ml air).These essential oils could be used as antifungal and fumigant agents against Ceratitis capitata by increasing the dose.

This study contributes to the understanding of the insecticidal activity of diatomaceous earth against pine processionary caterpillars in the Thniet El Had National Park, Tissemsilt, Algeria. A number of factors influenced this decision, including the fact that it is a dangerous bug of the Aleppo pine that slows tree growth and poses a health risk to the general people. The microscopic structure of diatomaceous earth revealed a porous structure, demonstrating its water absorption capacity. We tested the effectiveness of diatomaceous earth against caterpillars in petri dishes in the laboratory, and we tested the effectiveness of our diatomaceous earth trap in the field. For the results in the laboratory, the insecticidal activity of diatomaceous earth on caterpillars showed highly significant results, with a lethal concentration 50 of 11.14 mg/cm² and lethal concentration 90 of 14.23 mg/cm². The study of the average mortality of caterpillars showed an increase according to the doses of diatomaceous earth used, as shown by an ascending curve to give the maximum mortality value (10 individuals per repetition) for the dose of 15 mg/cm² after 120 hours of exposure to diatomaceous earth. The application of the diatomaceous earth trap on the field resulted in a mortality rate of 50% of caterpillars, 42.86% of living caterpillars, and 7.14% of pupae. These results indicate that the tested diatomaceous earth can be a solution against this pest, and the diatomaceous earth eco-trap (collar) for pine and cedar processionary caterpillars is considered an excellent integrated pest management tool, non-toxic and environmentally friendly.

The study, conducted with the aim of protecting market garden crops, focused on the medicinal plant Inula viscosa, whose essential oil was evaluated for its fungicidal efficacy against phytopathogenic fungi affecting Solanum melongena L. (eggplant). The essential oil yield was relatively high,...