Khadija Lachguer, Abdellatif Zakriti and Et Zouhir Chafik

Extracts from Nicotiana glauca, Withania frutescens, Urtica urens, Ricinus communis, Rosmarinus officinalis and Oxalis pes-caprae collected in the Oriental region were tested for their insecticidal effects on the adults of Macrosiphum rosae and Gynaikothrips ficorum, pests attacking Green spaces, under laboratory and field conditions. The insecticidal tests carried out revealed very important results; all the extracts of the plants used have an insecticidal effect, which is high in the concentration of 100%, this effect appeared as early as 24 hours after the treatment. At the laboratory, extracts of Withania frutescens, Nicotiana glauca, Urtica urens and Ricins communis have the highest mortality rates, from 93% to 100% on Macrosiphum rosae and Gynaikothrips ficorum, while Oxalis pes-caprae, Rosmarinus officinalis have the lowest mortality rates, from 53% to 77%. These results are confirmed by the field tests, noting that the extracts have a lethal repellent insecticidal effect; All extracts show a high insecticidal effect on Macrosiphum rosae exceeding 90% except Rosmarinus officinalis which has the lowest mortality rates (85%), whereas for the test against Gynaikothrips ficorum the extracts of Nicotiana glauca and Urtica urens have the highest insecticidal effect arriving at 100%, the others Extracts; Ricinus communis, Rosmarinus officinalis, Withania frutescens, and Oxalis pes-caprae have the lowest mortality rates from 67% to 81%.

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