Which of the following is not correctly matched?
(1) covered smut of barley - Ustilago nuda
(2) root-knot disease - Meloidogyne javanica
(3) late blight of potato - Phytophthora infestans
(4) smut of bajra - Tolysporium penicillariae
Correct answer: (1) covered smut of barley - Ustilago nuda
Explanation:
The root knot nematodes, Meloidogyne sppare are the most dominant group of plant parasitic nematodes in almost every vegetable field and cause enormous losses every year in the nursery. The common species are Meloidogyne arenaria, M. incognita and M. javanica. The pathogen responsible for smut of Bajra is Tolyposporium penicillariae. Ustilago hordei causes covered smut of barley and Ustilago nuda causes loose smut of Barley. The causal organism of late blight of potato is Phytophthora infestans.