By the way, the best news-- pigeon problems for the rich at 927 will increase because they removed the spikes and the natural controls.
12.
They are often foreign species accidentally or imprudently imported into a region where there are few natural controls to limit their population and spread.
13.
There are no effective so-called natural controls, like insects or grubs that feed on them or pinpoint chemicals that have no effect on anything else.
14.
Gas Natural controls 90 percent of Spain's natural gas market, and has expanded in Latin America and Spain's electricity industry as it faces increased competition.
15.
Likewise, pesticides sprayed to control mosquitoes may temporarily depress mosquito populations, however they may result in a larger population in the long run by damaging natural controls.
16.
However, although the larvae are voracious feeders, the species seems to have done so little harm as to have escaped notice, presumably because of natural control by parasitoids.
17.
Conversely, some interest is ongoing in certain species of " Henosepilachna " as natural controls of pest thistles, and in fact most Epilachninae attack plants of little agricultural interest.
18.
"Unless some sort of natural control agent comes along, they're going to keep exploding, " said Frank Putz, a biologist with Union Electric Co . in St . Louis.
19.
The first-stage larvae move to find an ootheca of grasshoppers, as these beetles are predators of Acridids eggs ( Acrididae species, especially locusts ), being a natural control agent.
20.
The list of nonnative plants that are able to escape natural controls and invade areas where they are not wanted includes many species that are still being purposely planted in gardens.
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