scholarly journals Megabruchidius dorsalis (Fåhreus, 1839) (Coleoptera: Chrysomelidae: Bruchinae) is a new adventive species in the Kharkiv Region (Ukraine)

2018 ◽  
Vol 26 (2) ◽  
pp. 15-18 ◽  
Author(s):  
I. P. Lezhenina ◽  
Yu. V. Vasylieva

Larvae, pupae and imagoes of Megabruchidius dorsalis have been found in October 2018 as a result of examination of the beans of the honey locust (Gleditsia triacanthos) in the arboretum of the Dokuchaiev Kharkiv National Agrarian University. The seed beetles colonized in 52% of the beans harvested in the current year and in 81% of the beans harvested in the previous years.

2015 ◽  
Vol 18 ◽  
pp. 266-274 ◽  
Author(s):  
Chuan-Rui Zhang ◽  
Amila A. Dissanayake ◽  
Muraleedharan G. Nair

2019 ◽  
Vol 81 (3) ◽  
pp. 146-150
Author(s):  
Marcel Robischon

Object-based learning is an approach that aims to foster observational skills and sensory awareness. Paradoxical plant objects that do not lend themselves to all-too-easy explanations and interpretations can be used to practice the search for ecological explanations and the formation of evolutionary hypotheses. They can be the basis of particularly fruitful and rewarding learning experiences. Gleditsia triacanthos, the honey locust, is a commonly planted ornamental tree. It exhibits striking structures of defense against – and fruit that point to a mutualism with – large animals. These structures, possibly developed in coevolution with Pleistocene faunas, invite a discussion of the complex, neither fully antagonistic nor fully mutualistic, relationships between plants and animals.


2004 ◽  
Vol 18 (sp1) ◽  
pp. 1325-1329 ◽  
Author(s):  
ENRIQUE J. CHANETON ◽  
C. NOEMÍ MAZIA ◽  
MARINA MACHERA ◽  
ANDREA UCHITEL ◽  
CLAUDIO M. GHERSA

2021 ◽  
Vol 39 (2) ◽  
pp. 68-76
Author(s):  
Philip Westra ◽  
Curtis Hildebrandt ◽  
Hudson K. Takano ◽  
Todd A. Gaines ◽  
Franck E. Dayan

Abstract Field trials were conducted to assess the impact of aminocyclopyrachlor on green ash (Fraxinus pennsylvanica Marshall) and honey locust (Gleditsia triacanthos L.) trees in an urban environment. Aminocyclopyrachlor is a relatively new, selective, plant-growth-regulator herbicide in the pyrimidine carboxylic acid family. Treatments were applied to Kentucky bluegrass (Poa pratensis L.) sod growing with and without trees present. Evaluations included determination of a safe spraying distance from target trees and the effect of application timing on tree response. This multi-year study showed that green ash was highly tolerant to aminocyclopyrachlor while honey locust developed severe injury in trees closest to applications. Honey locust trees up to 7 m (23 ft) from the tree trunk to the edge of the application displayed moderate to severe injury symptoms and fall treatment in October and November had the lowest tree injury compared to all other application timings. Honey locust trees exhibiting moderate to severe cosmetic injury would not be acceptable to landowners; recovery over time was minimal. Trees located 13 m (43 ft) away displayed no injury for any treatment timing. Soil analysis demonstrated that aminocyclopyrachlor dissipation was the same underneath green ash and honey locust trees, and that dissipation was faster in the presence of growing trees. Taken together, these results provide a basic groundwork necessary for improving aminocyclopyrachlor labels, and a better understanding of this herbicide's effect on certain woody species. Index words: Herbicide injury, aminocyclopyrachlor, herbicide fate, tree safety. Species used in this study: Green ash, Fraxinus pennsylvanica Marshall, honey locust, Gleditsia triacanthos L. Chemicals used in this study: Aminocyclopyrachlor.


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