Hydrilla is a huge impediment to tourism and can lower real estate values. The economic consequence is steep. It includes both the damage incurred by hydrilla as well as attempts at controlling and eradicating it. Control Level Diagnosis: Hydrilla verticillata should be given the "Highest Priority" diagnosis because the threats heavily outweigh the benefits.
The impact of this species upon its invaded environment is overwhelming and destructive. Its rapid spread and complete dominance of invaded environs suggest at the very least that Hydrilla should be maintained if not eradicated.
It is already identified within the noxious weed laws of nine states and many other states have already instituted programs for its control. Eradication has been successful only in a few areas, including Arizona and California. Control Method: Extensive biological research has been conducted in order to better find a method of control and eradication. No substantial success was achieved until the mids when fluridone sonar was used. It could be used on an entire lake and it could be a pretty selective process but it is a costly and time-consuming process.
Mechanical control has been attempted but has proven to be too costly, often taking up to six harvests a year due to the high reproduction rate of the plant. Biological control has also been tested but failed as well, accidentally introducing a few new invasive species.
It seems that early detection and eradication, once the introduction of hydrilla has been detected, remains to be the most important control method. Batcher, Michael S. Mechanical harvestors can be used to remove hydrilla from the water and transport it to shore for disposal. One drawback in the use of mechanical harvesters is that cuttings of hydrilla, which are not removed from the water, help to spread this weed.
Currently, four insects and one fish have been released to control hydrilla, but only two of these insects are established, and only one is commonly associated with hydrilla in the southeastern U. Click here to learn more. Several registered aquatic herbicides provide temporary control of hydrilla. Plant Directory. Impacts Hydrilla has widescale impacts in Florida waters and is highly adaptable to a variety of growing conditions.
Preventive Measures Avoid introducing hydrilla into water bodies. Mechanical Mechanical harvestors can be used to remove hydrilla from the water and transport it to shore for disposal.
Biological Currently, four insects and one fish have been released to control hydrilla, but only two of these insects are established, and only one is commonly associated with hydrilla in the southeastern U.
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