Correct option is D
The correct answer is (D) (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
Explanation:
• Irish Famine (1845): Caused by Late Blight of Potato ($Phytophthora$ $infestans$). It led to massive starvation and migration in Ireland.
• Bengal Famine (1943): Caused by Brown Spot of Rice ($Helminthosporium$ $oryzae$) in British India, resulting in millions of deaths.
• Coffee Rust (1870): Caused by $Hemileia$ $vastatrix$ in Sri Lanka (then Ceylon), which forced the island to switch from coffee to tea production.
• Downy Mildew of Tobacco (1950): Occurred as a significant epidemic caused by $Peronospora$ $tabacina$.
Information Booster:
• The Irish Famine is often considered the birth of Plant Pathology as a science, as it led to the realization that fungi cause diseases.
• The Bengal Famine of 1943 was exacerbated by administrative failures during World War II.
Additional Knowledge:
• P.M.A. Millardet discovered Bordeaux mixture in 1882 in response to Downy Mildew of Grapes, which had devastated French vineyards.
• Anton de Bary (1861) proved that $P.$ $infestans$ was the cause of the Irish potato blight.