The correct option is D Phytophthora palmivora
Bioherbicides are biological weed control agents that help reduce the population of the agricultural pests. These agents control and destroy unwanted plant growth without the help of man-made chemicals and without destroying or effecting the crop plants. The bioherbicides are either compound that are derived from fungi, bacteria or protozoa or are phytotoxic plant residues or extracts. The first bioherbicide Phytophthora palmivora was put into use in 1981 was fungus based ( mycoherbicide ). This protects the Citrus orchards from the growth of Milkweed Vine.