UNIT-I (B.Sc-SDC-PN1EM)
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7. Explain about Nursery Diseases and their management
Ans: Agricultural production of the world sustains annual loss
of about 20 to 30% on an average due to plant diseases on
different crops and in different countries. Plant diseases is one of
the major bottlenecks in Agricultural Production in imigated
crops, monoculture cultivations, widely grown rainfed crops as
well as in plant nurseries.
Favorable Conditions for Diseases Infestation
Plant diseases are caused by various sources like micro-
organisms, including fungi, bacteria, viruses, mycoplasmas, etc.
or may be incited by physiological causes including high or low
Answers
Answer:
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