Tuesday, August 25, 2015

Cicada killer damage

The cicada killer Sphecius speciosus wasps are solitary wasps that borrow tunnels in well drained soils with full sun light in areas near trees that harbor cicadas.  Over time they build large aggregations.  It is estimated that 40% of developing larvae may emerge the following year (12 or more per tunnel).  
The females have significant stingers which injects venom and paralyzes the insect. the cicada is then carried into the tunnel where the wasp places it's eggs inside the cicada which is then used for food for the larvae.  The Sphecius speciosus are not aggressive and are not nest protectors.  You can walk  through areas that are active without fear of being attacked.  However if provoked the females can sting and will be quite painful. 
To control the insect, we pour water into the hole covering it immediately after water is applied which flushes out the wasp.  Once the wasp is flushed out of the hole it is caught in the cup used to cover the hole with and then exterminated using no chemicals at all for control. 
They are very active on the eleventh green and have caused damage worthy of controlling the insect and plugging the green.