The Distribution and Spread of (Homoptera: Aphididae) in the North-Central States with Notes on its Hosts, Biology, and Origin

(excerpt) Hyadaphis tataricae (Aizenberg). an aphid known from eastern Europe, is rapidly becoming a pest on ornamental honeysuckles (Lonicera spp.) throughout the north-central states. The source of the infestation is not known but it could have been introduced from eastern Canada where it has been present since 1976 (Boisvert et aI. 1981), or by separate introduction from eastern Europe. The first observations in the United States were made in the north-eastern corner of Illinois (Lake County) in 1979 (Voegtlin 1981). Observations of damage levels in that area support the hypothesis that its introduction to the north-central states originated there

Notes on \u3ci\u3eHyadaphis Foeniculi\u3c/i\u3e and Redescription of \u3ci\u3eHyadaphis Tataricae\u3c/i\u3e (Homoptera: Aphididae)

The occurrence of Hyadaphis foeniculi in North America is discussed and a list of its synonyms in the North American literature is presented. H. tataricae is redescribed and a key to separate the two is given along with comparative drawings and photo- graphs

A Method for Making Customized, Thick Labels for Microscope Slides.

This paper describes a technique for creating customized, thick (= 1 mm) slide labels, and fastening them permanently to slides so they can be stored vertically by stacking or horizontally like cards in a file without putting pres­sure on the coverslip. After 20 years, thick labels created by this technique have shown no sign of degradation; labels fastened to slides with silicone caulking have remained securely attached. A storage system, using insect drawer sized trays that hold large numbers of thick labelled slides, is shown. The use of thick labels and such a storage system simplifies the curation of large numbers of slides

Morphological Differentiation Between \u3ci\u3eAphis Spiraecola\u3c/i\u3e and \u3ci\u3eAphis Pomi\u3c/i\u3e (Homoptera: Aphididae)

Aphis pomi and Aphis spiraecola, are both found on agriculturally important hosts such as apple and pear, and in trap collections. Their morphological similarity makes identification difficult. Examination of specimens of both species fom a wide geographical range demonstrated that available keys, especially those based on European material, were not always accurate for North American specimens. Data taken from North American specimens is presented and a key is provided to aid in the identification of trapped alatae preserved in alcohol as well as slide mounted alatae and apterae of these two species

A New Species of \u3ci\u3eAphis\u3c/i\u3e in Minnesota (Hemiptera: Aphididae) on Narrow-Leaved Purple Coneflower, \u3ci\u3eEchinacea Angustifolia\u3c/i\u3e

Aphis echinaceae, n. sp. is described from specimens collected in Douglas County, Minnesota, on Echinacea angustifolia (DC.). The aphid is illustrated with biometric data for alate and apterous vivipara. Its short cauda and siphunculi, and presence of secondary sensoria on antennal segments III, IV, and V in both morphs makes this Aphis morphologically similar to A. debilicornis (Gillette and Palmer), A. lugentis Williams and A. caliginosa Hottes and Frison, and root feeding aphids of the subgenus Pseudoprotaphis Kadyrbekov and genus Protaphis Börner. A diagnosis is provided

Blinded by a Social Cause? Differences in Cognitive Biases between Social and Commercial Entrepreneurs

How are social entrepreneurs different from commercial entrepreneurs? This study sheds light on this issue by applying the perspective of entrepreneurial cognition and by arguing that social entrepreneurs are even more susceptible to cognitive biases than commercial entrepreneurs. The empirical study of 205 Swiss entrepreneurs could confirm that social entrepreneurs tend to be more overconfident and prone to escalation of commitment than commercial entrepreneurs, while the study found no differences for illusion of control. The findings indicate that cognitive biases are an important puzzle piece to understand the differences between social and commercial entrepreneurs

Development of a Scale Measuring Discursive Responsible Leadership

The paper advances the conceptual understanding of responsible leadership and develops an empirical scale of discursive responsible leadership. The concept of responsible leadership presented here draws on deliberative practices and discursive conflict resolution, combining the macro-view of the business firm as a political actor with the micro-view of leadership. Ideal responsible leadership conduct thereby goes beyond the dyadic leader-follower interaction to include all stakeholders. The paper offers a definition and operationalization of responsible leadership. The studies that have been conducted to develop the discursive responsible leadership scale validated the scale, discriminated it from other leadership scales, and demonstrated its utility in affecting unethical behavior and job satisfaction in organizations. Responsible leadership is shown to be first, dependent on the hierarchical level in an organization; second, capable of reducing unethical treatment of employees; and finally, a means of enhancing the job satisfaction of employees. The paper concludes with study limitations, future research directions and practical implication

Feeding Records of Aphids (Hemiptera: Aphididae) From Wisconsin

Basic to our understanding of any animal and its habitat requirements is knowing what it eats. Reported here are observations of feeding by 27 species of aphids encountered in Wisconsin over 1992-2002