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...
glasshouse, nursery. 1  building, edifice - a structure that has a roof and walls and stands more or less permanently in one place; there was a three-story building on the corner; it was an imposing edifice. 2  hothouse, indoor garden, conservatory - a greenhouse in which plants are arranged in a pleasing manner. orangery - a place where oranges are grown; a plantation of orange trees in warm climes or a greenhouse in cooler areas. Adj. 1. greenhouse - of or relating to or caused by the greenhouse effect; greenhouse gases greenhouse