The congress grass, Parthenium hysterophorus L., is a major agricultural and environmental threat in India and abroad. The weed has caused significant negative impacts on the environment, agriculture, economy, human health, livestock and soil properties. This invasion problem is likely to be exacerbated by climate change. In recent times, there has been increasing concern about the spread of the insidious P. hysterophorus in cultivated and non-cultivated lands crosswise India. Study on the biology of the parthenium weed, it predation through Zygogramma biclorata and we are recorded that the maximum germination percent at 15 to 25 °C. It has immense potential to emerge out from depth 0-3cm surface area. Flowering observed at high intensity of sunlight. Invasive weed can be managed by adopting an integrated approach involving several management tactics. The Mexican defoliater beetle, Zygogramma bicolorata Pallister is one of the dominant biocontrol agent against congress grass, P. hysterophorus L., still it is considered as detrimental pest of sunflower.