Question

The first bioherbicide was obtained from
A. Erysiphe
B. Colletotrichum
C. Penicillium notatum
D. Phytophthora palmivora

Answer 1

Hint:Bioherbicides consist of
1.Phytotoxins
2.Pathogens
3.Other microbes that are used as biological weed control.
Bioherbicides maybe
1.compounds
2.secondary metabolites
They arise from the microbes such as fungi, bacteria, or protozoa or from the phytotoxic plant residues/ extracts or maybe a single compound derived from other plant species.

Complete solution: Bioherbicides are known as biological weed control agents that help us to reduce the population of agricultural pests.
These agents control and destroy unwanted plant growth without the help of man-made chemicals and without destroying or affecting the crop plants.
These are either compounds that are derived from fungi, bacteria, or protozoa or are phytotoxic plant residues or extracts.
The first bioherbicide Phytophthora palmivora and was put into use in 1981 was fungus based mycoherbicide.
This protects the Citrus orchards from the growth of Milkweed Vine.
Phytophthora is also known as Devine and is the first bioherbicide registered, was developed in Abbott Laboratories, and produced from a facultative fungus, Phytophthora palmivora Butl.
This fungus mainly causes the root rot of Morrenia odorata (Hook and Arn) Lindl. and it is able to be very successful for a prolonged period of time by saprophytic that remains in the soil.

So, the correct option is option D. Phytophthora palmivora.

Note: Phytophthora palmivora is an oomycete that causes
1. Bud-rot of palms
2. Fruit-rot
3. kole-roga of coconut
4. Areca nut.
The above written is included among the most serious and life-threatening diseases caused by fungi and molds in the South India region.
The main cause of any infection caused was first identified as Phytophthora palmivora by Edwin John Butler in 1917.