The mycoherbicide De-vine contains fungal spores of:

Correct option is B

De-Vine is a commercial mycoherbicide developed for the biological control of strangler vine (Morrenia odorata), primarily in citrus orchards.
It contains spores of the fungus Phytophthora palmivora , which causes disease in the target weed, leading to its suppression and eventual death without harming the main crop.
Explanation:
(a) Colletotrichum gloeosporioides – Used in other bioherbicides like Collego, which targets northern jointvetch, not used in De-Vine.
(b) Phytophthora palmivora – Correct. This fungus is the active component in De-Vine, used specifically for controlling Morrenia odorata.
(c) Streptomyces hygroscopicus – A bacterium, not a fungus; used to produce the herbicide Bialaphos, not a component of De-Vine.
(d) Bipolaris sorghicola – Known for affecting sorghum, not used in De-Vine or targeting the specific vine.