The potato leafhopper (PLH) is the most serious insect pest of alfalfa in Wisconsin and the Upper Midwest. PLH injury to alfalfa can result in leaf yellowing (“hopperburn”), plant stunting, loss of yield and forage quality, and reduced alfalfa stand persistence. Leafhopper populations are a perennial problem in new alfalfa seedings, and they frequently increase to damaging levels on the second ...

Eight species are described from Ecuador (Napo Prov.) as new on the basis of specimens reared from their larvae. These are: Xoser astonyx n. sp., Orthocomotis parandina n. sp., Anacrusis yanayacana n. sp., Anacrusis guttula n. sp., Sisurcana sanguinoventer n. sp., Sisurcana cirrhochroma n. sp., Sparganothina hermosa n. sp., Lypothora roseochraon n. sp.

The braconid genus Napo was established by Shaw (2012) for a single species Napo townsendi Shaw, 2012 from Napo Province, Ecuador. However, the genus name Napo is preoccupied and was initially introduced by Linnavuori & DeLong (1976) for a deltocephalinae leafhopper genus with Napo brazosellus Linnavuori & DeLong, 1976 as the type species (Hemiptera: Cicadellidae). Thus, the genus Napo Shaw, 20...

Plant-mediated competition among insect herbivores occurs when one species induces changes in plant chemistry, nutrition, or morphology that render plants resistant to attack by others. We explored plant-mediated interspecific interactions between the potato leafhopper (Empoasca fabae) and the Colorado potato beetle (Leptinotarsa decemlineata), two important pests on potatoes. Leafhoppers colon...

Rice dwarf virus (RDV) replicates in and is transmitted by a leafhopper vector in a persistent-propagative manner. Previous cytopathologic and genetic data revealed that tubular structures, constructed by the nonstructural viral protein Pns10, contain viral particles and are directly involved in the intercellular spread of RDV among cultured leafhopper cells. Here, we demonstrated that RDV expl...

Species assemblages are the results of various processes, including dispersion and habitat filtering. Disentangling the effects of these different processes is challenging for statistical analysis, especially when biotic interactions should be considered. In this study, we used plants (producers) and leafhoppers (phytophagous) as model organisms, and we investigated the relative importance of a...

We conducted studies in a Paso Robles, CA, grape (Vitis vinifera L.) vineyard in 2002 and 2003 to estimate the impact of regulated deficit irrigation (RDI) intensity and duration on western grape leafhopper, Erythroneura elegantula Osborn. Treatments were based on deficit intensity, 50 and 25% of standard irrigation (moderate and severe deficits, respectively), and deficit duration, 3 or 6 wk t...

The present investigation was carried out at the experimental farm of Project Coordinating Unit Sesame and Niger (ICAR), College Agriculture, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (Madhya Pradesh) during summer season, 2022. results revealed that peak period for incidence whitefly mirid bug were recorded in 19th standard week while leafhopper 20 week. 40°C maximum 24°C minimum temp...

Rice gall dwarf virus (RGDV), a member of the family Reoviridae, causes repeated epidemics in rice fields in southern China. An RGDV isolate collected from Guangdong Province (southern China) is mainly transmitted by leafhopper vector Recilia dorsalis in a persistent-propagative manner. The infection by RGDV induces the formation of virus-containing tubules in the plant host and insect vector. ...

The intensification of agriculture drives many ecological and environmental consequences including impacts on crop pest populations and communities. These changes are manifested at multiple scales including small-scale management practices and changes to the composition of land-use types in the surrounding landscape. In this study, we sought to examine the influence of local and landscape-scale...