This study aimed to detect the chemical compounds contained in Cuscuta campestris seeds and shoot parts using the GC-MS following methanol extraction method, and also determining protein, total phenolic, total soluble carbohydrates, plant hormones and pigments for both seeds and shoot (flower and filament). The GC-MS analysis results showed six compounds are common between seed and shoot and the presence of different compounds in different plant parts including 24 compounds in seeds and 9 compounds in the shoot parts. The content of protein and carbohydrate in shoot (1.095% and 22.640 mg g -1 respectively) were higher than in seeds and the total phenols content in seeds (11.094 mg g -1 ) was greatest than in shoot. In addition, there were differences between seeds and filaments parts in terms of concentration of pigments and free plant hormones, filaments were superior in total chlorophyll and carotene content (5.37 mg 100 g -1 and 13.26 mg 100 g -1 respectively). In seeds, ABA content was very high reaching 93.38 lM compared to other hormones, which had an effect on the seed dormancy of C. campestris.

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Field dodder (Cuscuta pentagona) is a predominant plan parasite on Solanaceous vegetables in Iraq. Series of field experiments were carried out in Najaf province during 2018 season to evaluate the efficiency of Bonanza to control C. pentagona parasitizing on eggplant. Results highlighted that there were significant differences in all studied indicators in comparison with control treatment. Bonanza treatment was greater in term of leaves number, surface area, plant height, dry weight of root and shoot, less time to mature the first fruit and increasing the production of fruits for each plant. Leave contains of carbohydrates, mineral elements, salicylic acid, chlorophyll, total phenols and plant hormones (IAA, GA3) were increased compared to control treatment. Fruit contains of Ascorbic acid and total soluble solids were also increased. Bonanza weedicide was controlled C. pentagona on treated plants as well as increased early and total field productivity respectively (8.016, 67.68 t/ha−1) in comparison with control (6.690, 40.80 t/ha−1). GC-MS analyses showed that there is no weedicide residues on fruits treated with Bonanza after ten days.

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