Print ISSN: 2077-5822

Online ISSN: 2618-1479

Author : Wassima, LAKHDARI


BIO-INSECTICIDAL EFFECT OF POLYPHENOL EXTRACTS OF ANVILLEA RADIATA AGAINST CEREAL APHID RHOPALOSIPHUM PADI

BENYAHIA Ibtissam; HADJ-MAHAMMED Mahfoud; BOUZIANE Mebarka; DEHLIZ Abderrahm; LAKHDARI Wassima

Al-Qadisiyah Journal For Agriculture Sciences, 2020, Volume 10, Issue 1, Pages 264-270
DOI: 10.33794/qjas.2020.167075

To reduce the abusive apply of artificial organic pesticides with discernment, biodegradable bio-pesticides origin from plants were used as an alternative phytosanitary method against crop pests. This experimentation allowed testing in vitro the bio-insecticidal activity of Anvillea radiata Coss and Dur (Asteraceae), endemic plant from the southeastern Algeria, against the cereal aphid Rhopalosiphum padi (Linnaeus, 1758). Three concentrations were tested (D1= 5mg/ml, D2= 2.5mg/ml and D3= 1.25mg/ml) with the butanolic and chloroformic extracts. The results showed a mortality rate of R. padi varying significantly by treatment and concentration according to the tested substances. The quantitative analysis of the two extracts shows that the crude butanolic extract is rich in polyphenols (348.935±7.456 μg EAG/mg MS) compared to the crude chloroformic extract (56.754±0.982 μg EAG/mg MS). Samely to the insecticidal effect tested, the concentration of 5 mg/ml presented an important insecticidal activity with the butanolic extract (62%) higher than the chloroformic extract (26%). Also, the lethal doses (LC50) of the crude butanolic extract were estimated by 23.07 mg/ml, 6.71 mg/ml and 5.70 mg/ml respectively after 24, 48 and 72hours of the treatment.

AGRO-MORPHOLOGICAL RESPONSE OF CORN (Zea mays L.) TO A BIOSTIMULANT FROM THE SOUTHEASTERN ALGERIA

LAKHDARI Wassima; DEHLIZ Abderrahmene; MLIK Randa; CHERGUI Salima; BENLAMOUDI Wiam; LAKHDARI Fatma; ACHEUK Fatma; HAMMI Hamida

Al-Qadisiyah Journal For Agriculture Sciences, 2020, Volume 10, Issue 1, Pages 215-220
DOI: 10.33794/qjas.2020.167068

Abstract: This study highlights the effect of a biostimulant based on Trichoderma, indigenous antagonistic fungus from the region of Touggourt, on the development of a local variety of corn. This study was conducted at the experimental station of National Institute of Agronomic Research (Sidi Mehdi, Touggourt) as a complete randomaize block designe. The examined agro-morphological parameters showed that the application of this bioproduct stimulates vegetative growth of the plant. Besides, better germination and earliness of seeds. The results showed more interesting values were obtained in the treated plots (height = 135.9 cm, diameter = 28.9 mm, surface of leaves = 318 cm2, Pan = 10.2 panicles/plant) compared to those of the controls (height = 98.6 cm, diameter = 23.7 mm, surface of leaves = 260.4 cm², Pan = 7.4 panicles/plant). Statistical analyzes confirmed the existence of a very highly significant difference between treated and control subjects.