Distribution of Plant-Parasitic Nematodes in Michigan Corn Fields.

Plant-parasitic nematodes (PPNs) can cause substantial economic yield losses to many agronomic crops in the United States. A regional-scale survey was completed across 20 counties to determine PPNs prevalence in Michigan corn and how factors such as soil type, tillage, irrigation, and cropping systems influence their distribution. Ten different major genera of PPNs were identified in Michigan corn fields: (needle), (spiral), (lesion), (root-knot), (cyst), (lance), or (stunt), (pin), (ring), and (dagger).

Functional Response of Generalist Predators to Halyomorpha halys (Hemiptera: Pentatomidae) Eggs.

The brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), is an invasive agricultural pest in the United States with the potential to become a serious economic threat to Michigan agriculture. As a novel pest in Michigan's agroecosystems, the potential for a biological control program that utilizes existing natural enemies for H. halys is currently unknown.