Natural areas including woodlands, prairies, and even hedgerows in urban landscapes can be overtaken by invasive weeds – which are also “natural”. To some, the idea of using herbicides in “natural” settings may seem a little ironic, but in fact herbicides are a useful and valuable tool for land owners and managers. Although causing window-feeding when young, the larger larvae eat holes in the leaflets and even cause defoliation. The green larvae are more numerous on the undersides of the leaflets. We've had several reports of bristly rose slug causing rose foliage to be lacelike. The Cassini 17-year cicada is much smaller and the underside of its abdomen is all black.
![pharaoh cicada pharaoh cicada](https://images.forwardcdn.com/image/1300x/center/images/cropped/gettyimages-50844749-1619464855.jpg)
The pharaoh cicada is the larger of the two and has thick orange stripes across the underside of its abdomen. These species can be differentiated by both their size and markings. This year we can see two species of periodical cicadas, the pharaoh cicada (Magicicada septendecim) and Cassini 17-year cicada (Magicicada cassinii). Home, Yard, and Garden readers can use the links below with the degree day accumulations above to determine what insect pests could be active in their area.īrood X periodical cicadas (Magicicada spp.) are emerging now in Edgar, Clark, Crawford and Vermillion counties and will continue to emerge until late-June.
![pharaoh cicada pharaoh cicada](https://vf-angelsport.de/media/image/product/200516/lg/spinmad-cicada-king-18g.jpg)
We can use degree days to help predict insect emergence and activity.
![pharaoh cicada pharaoh cicada](https://i.ytimg.com/vi/rTqwR4gZ3vc/maxresdefault.jpg)
Insect development is temperature dependent. Modified Growing Degree Days (Base 50⁰ F, March 1 through June 1)