10. A monocyclic disease does not produce: a) chlamydospores b) secondary inocul

Question

10. A monocyclic disease does not produce: a) chlamydospores b) secondary inoculum spores c) sexual spores d) teliomorphs e) mycelium 11. Which of the following sequences is the correct one when describing the process of infection by a biotrophic plant pathogen? a) germination, haustorium formation, appressorium formation, penetration peg b) appressorium formation, penetration peg formation, haustorium formation, c) hastorium formation, penetration peg formation, appressorium formation, d) germination, appressorium formation, penetration peg formation, haustorium e) germination, penetration peg formation, appressorium formation, haustorium formation germination germination formation formation

Explanation / Answer

10. b. Secondary inoculum spores.

Since monocyclic disease is only caused in a single season, so these pathogens do not produce secondary inoculum spores and hence no secondary infection is seen.

11. d. germination, appressorium formation, penetration peg formation, haustorium formation.

Conidia germinate to form appressorium, which forms the penetraion peg that penetrates plant tissue; it spreads as haustorium, the epiphytic hyphae again produces conidia.

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