Ekka, what could be Phloem necrosis, caused by a mycoplasma-like organism (formerly believed to be a virus infection), and is usually spread from diseased to healthy elms by an insect, the leaf hopper, (Scaphoideus leuteolus). which could be the shells that you have come across. No known cure for this (like Dutch Elm Disease) Only the Leafhoppers can be controlled with a spray containing 1 pound Carbaryl (2 pounds 50 percent, or 1-1/2 pounds 80 percent Sevin wettable powder) per 100 gallons of water. In hydraulic sprayers, apply at the rate of 20 to 25 gallons per 50-foot elm.
The ants that you have found would possibly be feeding on the larvae of the Leafhopper and subsequently nesting near to their food source.
Hope this is ok. |