Since 1997, the main approach has turned to biological control.
Two insects are also being used as a biological control.
The second species might potentially be used for biological control.
Biological control, however, creates none of these problems, he said.
Their use as a biological control is also a noteworthy cause.
If biological controls are used, they must target specific problems.
Some of them, and there was a big debate about it, even used biological controls.
These species have been used in biological control of the pest.
But still, nearly all the scientists agree that biological control itself should not be abandoned.
Briefly, in 1948 the idea of an international organization on biological control was conceived.