Genetic Resistance. Can be developed within 5-10 years by insects (much sooner in tropical areas). It is a developed immunity to pesticides that, through natural selection, can make the insects come back stronger. Weeds and plant disease organisms also develop this, but much more slowly. Tolerance Level
greenhouse definition: The definition of a greenhouse is a building made of glass panes in which heat and humidity can be regulated in order to grow plants. (noun) An example of a greenhouse is where vegetables can be grown when the outside weather is bel...
â¢ GREENHOUSE EFFECT (noun). The noun GREENHOUSE EFFECT has 1 sense: 1. warming that results when solar radiation is trapped by the atmosphere; caused by atmospheric gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth.Familiarity information: GREENHOUSE EFFECT used as a noun is very rare.Dictionary entry details.. warming that results when solar radiation is trapped by the atmosphere; caused by atmospheric gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth.