Resource Book on Horticulture Nursery Management

in the form of fertilizers, insecticides, fungicides, weedicides, etc.
The newly introduced chemicals are often found to replace the older ones. Some
chemicals impart hazardous effects on humans, animals, plants and environment.
Therefore care should be taken to select the appropriate chemicals for use.
Restricted or Banned chemicals in the form of fertilizers, weedicides, pesticides,
fungicides, acaricides, bactericides, etc should be avoided. The State Agriculture
Department, Central Department, State Agriculture Universities should be consulted from
time to time for the updated status in this regards.
4.3 Glossary
Bacteria: Prokaryotic microorganisms, which are involved in decomposition.
Bio-pesticide: The term biopesticide is used for the microbial preparation or biological
pest control agents that are applied in a similar manner to chemical pesticides.
Caterpillar: Caterpillars are the larval form of a member of the order Lepidoptera.
Coleoptera: The order of insects comprising the beetles.
Crop Rotation: Crop rotation is the practice of growing a series of dissimilar types of
crops in the same area in sequential seasons for various benefits such as to avoid the
buildup of pathogens and pests which occurswhen one species is continuously
cropped.
Diptera: The order of insects comprising the flies.
Disease: A disease is an abnormal condition affecting the body of an organism.
Fungi: A fungus is a member of a large group of eukaryotic organisms that includes
microorganisms such as yeasts and molds as well as the more familiar mushrooms.
Fungicide Fungicides are chemical compounds or biological organisms used to kill or
inhibit fungi and fungal spores.
Mycoplasm: Mycoplasma is a genus of bacteria that lack a cell wall. Without a cell wall,
they are unaffected by many common antibiotics such as penicillin or other
betalactam antibiotics that target cell wall synthesis.
Nematode: The nematodes are the most diverse phylum of pseudocoelomates and one of
the most diverse of all animals.
Parasite: A parasite is an organism that lives on or inside another organism to the
detriment of the host organism.
Pathogen: A pathogen or infectious agent is a microbe or microorganism such as a virus,
bacterium, prion, or fungus that causes disease in its plant host.
Pesticide: A pesticide is any substance or mixture of substances intended for preventing,
destroying, repelling or mitigating any pest.
Predator: An organism which consumes live organisms as its source of food.
Trap crop: A trap crop is a plant that attracts agricultural pests, usually insects, away
from nearby crops.
Variety: A variety is a plant or group of plants selected for desirable characteristics that
can be maintained by propagation.
Vector: An insect or mite that transmits viruses.
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