2010 ◽  
Vol 36 (3) ◽  
pp. 140-146
Author(s):  
John Hartman ◽  
Ed Dixon ◽  
Shawn Bernick

Bacterial leaf scorch is a very serious tree disease, especially for oaks in Kentucky, U.S. landscapes. From 2003 to 2007, several potentially therapeutic disease management treatments were tried on diseased pin oaks (Quercus palustris) growing in golf course, street tree, and horse farm environments. Treatments included root flare soil drenches of paclobutrazol, adjuvant-assisted basal trunk applications of anti-microbial compounds, and springtime root flare injections of oxytetracycline. Paclobutrazol drenches caused expected growth regulator effects but did not consistently reduce bacterial leaf scorch of golf course and street trees. Antibiotics applied directly to trunks of infected trees with an adjuvant had no effect on levels of bacterial leaf scorch. Compared to untreated trees, springtime root flare injections of oxytetracycline reduced scorch levels and delayed by about two weeks, the time of appearance of late summer scorch symptoms. Injections done three weeks after full expansion of first leaves provided better results than injections done earlier or later in the spring. Therapeutic treatments do not provide a cure for trees infected with bacterial leaf scorch, but may prolong tree life.


2013 ◽  
Vol 33 (2) ◽  
pp. 115-119 ◽  
Author(s):  
Joe Luksovsky ◽  
Thomas M. Craig ◽  
Glenda M. Bingham ◽  
Tracy Cyr ◽  
David Forrest

2016 ◽  
Vol 39 ◽  
pp. S31
Author(s):  
J.G. Werneck ◽  
L.G. Prado ◽  
L.J.R. Siqueira ◽  
E.A. Costa

2020 ◽  
Vol 50 (4) ◽  
pp. 910-916
Author(s):  
Burcu BARAN KETENCİOĞLU ◽  
İnsu YILMAZ ◽  
Nuri TUTAR ◽  
İnci GÜLMEZ ◽  
Fatma Sema OYMAK

Author(s):  
Pedro Afonso SILVA ◽  
Mihai CERNEA ◽  
Luís MADEIRA de CARVALHO

Since the introduction of the last equine broad-spectrum anthelmintic group in the 1980’s, the investment in new drugs to control horse’s parasites did not result in new advancements. These drugs allowed a very effective and extensive control of equine nematodes through successful interval dosing programs, firstly introduced in the 1960’s. However, the widespread and indiscriminate use of anthelmintics in these intensive treatments have led to increasing resistance in the major equine nematodes. Reports of reduced effectiveness are virtually worldwide and repercussions in livestock production farms have already been seen.Based on recent questionnaires about horse farm practices, preventive measures and international recommendations, it is clear that most of them are still not being widely implemented. It is also clear that these recommendations are outdated and new approaches must be considered to correctly tackle this rapidly evolving issue in horse management, as more accurate diagnostic methods are currently available, such as Mini-FLOTAC. This article intends to do a general review of the history and current situation of anthelmintic resistance in horses, with emphasis in Europe, as well as, how to diagnose and delay or even prevent its further development, mentioning new methods of diagnostic and directions in which to develop research.


Sign in / Sign up

Export Citation Format

Share Document