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Content: If they killed off all of their host 
			insects, the nematodes would die off too. When we apply commercially 
			available biological control nematodes, we are attempting to 
			overload the natural system and kill many more insects than would be 
			killed by nematodes naturally. If the treatment is successful, and 
			most of the pest insects die, the nematode populations decline as 
			well. Soon the natural balance is restored. When insect populations 
			begin to build back up another nematode application is required. The use of insect parasitic nematodes and 
			other biological control agents to manage insect pests has grown in 
			popularity. This is primarily due to the changing problems 
			associated with pest control. For example, many pests have developed 
			resistance to certain pesticides, new pests have arisen to replace 
			those successfully controlled, the effectiveness of natural control 
			agents (predators, parasites and pathogens) has been reduced by 
			pesticide use, pesticides are no longer inexpensive to use, and 
			there is increased concern about pesticide safety and environmental 
			quality. These beneficial organisms can be an important component of 
			an integrated pest management (IPM) program for ornamental crops and 
			turf grass sites. Before and after applying beneficial 
			nematodes                                
What are beneficial nematodes?