The current investigation is an endivour to determine the efficacy of chloroform and alcoholic extracts of basil flowers and leaves in suppressing the southern cowpea beetle. The study demonstrated the influence of extract concentration, as the maximum average number of eggs deposited per female was 72,8 at a concentration of 0.25%. In terms of the extract type factor, alcoholic extract of basil leaves resulted in the greatest average egg production of 71,9 eggs per female. Due to the interaction, an alcoholic extract of basil leaves at a concentration of 0.25% resulted in the highest rate of egg production of 81.6 eggs per female and a chloroform extract of basil flowers at a dose of 1% resulted in the lowest rate of egg production of 28 eggs per female. The proportion of eggs that hatched from C. maculatus-treated adults varied on the extract’s kind and concentration. At a dosage of 0.25%, the greatest hatch rate of eggs was 77.6%. In terms of extract factor, alcoholic basil leaf extract resulted in the highest percentage of eggs hatching 71.5%, whereas chloroform basil flower extract resulted in the lowest percentage of eggs hatching 65.6%. The largest percentage of eggs that hatched as a result of the interaction was 81.6%, and it happened at a dose of 0.25% basil leaf alcoholic extract. The lowest percentage of eggs that hatched was 36.6% when an extract of chloroform from basil flowers was present at a concentration of 1%. The current study examined the impact of extract type and concentration on larval mortality from eggs of adults treated with C. maculatus, with 1% being the highest percentage. The extract type had the greatest percentage of larval death, with alcoholic basil leaf extract having 32.7% and chloroform basil leaf extract having 30.0%. The interaction caused the most larvae to die when the alcoholic extract of basil flowers was at 1% concentration and the fewest larvae to die when it was at 0.25% concentration.

The current study was conducted with the aim of evaluating the effects of crude terpene extracts of leaves and flowers collected from of Ammi majus on some aspects of the biological performance of Oryzaephilus surinamensis grain beetle. The results revealed that the crude terpene extract of flowers at concentrations of 10, 20 and 30 mg / ml had a significant effects on the cumulative mortality rate of the beetle’s different life stages. The highest mortality rate values reached (73.3, 46.7)% at the concentration 30 mg / ml after 72 hours treatment for the second larval instars and adults, respectively. While the mortality rates achieved from treatment with the same concentrations of the crude terpene leaf extract reached (53.3, 33.3)% after 72 hours for the second larval instars and adults.

This in vitro study evaluated the effects of crude alkaloid compounds extract of plant A. majus leaves and flowers on some biological performance aspects of the insect. The results showed that the alkaloid extract of flowers at concentrations of 10, 20 and 30 mg/ml significantly affected cumulative mortality at the different stages. The concentration ( 30) mg/ml had the most noticeable effects, causing the highest mortality rate in the second and fourth larval instars (86.7 and 73. 3 %, respectively) after 72 hours. At the same time, the mortality rates upon applying the same concentrations but of the alkaloid extract of the leaves were 73.3, and 53.3 %, respectively, following 72 hours of treatment. Keywords: Oryzaephilus surinamensis; Ammi majus; crude alkaloid compounds extract.