Identify the incorrect pair
Identify the incorrect pair
Select an option to attempt
Correct Answer: Option A
Explanation
Xanthomonas campestris pv. campestris is a phytopathogenic bacterium (causes black rot of brassicas). Industrially, it is cultivated for the production of xanthan gum — a high-molecular-weight anionic polysaccharide exopolysaccharide (-1,4-glucan backbone with trisaccharide side chains of mannose-glucuronic acid-mannose). Xanthan gum is a food additive (E415) used as a thickener, stabiliser, and emulsifier in foods, cosmetics, and oil drilling fluids. It is NOT used as a biopesticide. Established biopesticides: Bacillus thuringiensis (Bt) — Cry toxin-producing bacterium (insecticide); Trichoderma harzianum — fungal biocontrol agent against soil pathogens; Nuclear Polyhedrosis Virus (NPV) — baculovirus used against lepidopteran pests.