Flea beetles (Phyllotreta spp.), cabbage stink bugs (Eurydema ventrale) and onion thrips (Thrips tabaci) cause significant economic problems to cabbage growers in Slovenia. The aim of our study was ...to assess the potential effect of the epicuticular wax on leaves as defence mechanism against these three cabbage pests. The impact of epicuticular wax content in relation to damage levels of cabbage pests was studied under field conditions at the Experimental Field of the Biotechnical Faculty in Ljubljana on 12 cabbage cultivars (Brassica oleracea L. var. capitata). These insect pests showed weak preference on cabbage heads with high epicuticular wax. There was a strong negative relationship between epicuticular wax content and the level of plants infested (r2 = -0.8399 for flea beetles, r2 = -0.7413 for cabbage stink bugs and r2 = -0.7042 for onion thrips). The cv.‘Holandsko pozno rdeče’, showed itself to be the most resistant to the cabbage stink bugs and onion thrips, while cv. ‘Red Dinasty’ was the most resistant against flea beetles.
Kapusov bolhač (Phyllotreta spp.), pisana stenica (Eurydema ventrale) in tobakov resar (Thrips tabaci), povzročajo gospodarsko pomembne težave pridelovalcem zelja v Sloveniji. Cilj naše raziskave je bil oceniti potencialni učinek epikutikularnega voska na listih kot obrambnega mehanizma proti naštetim škodljivcem. Vpliv količine epikutikularnega voska na poškodbe, ki jih povzročajo škodljivci, smo proučevali na 12 kultivarjih zelja (Brassica oleracea L. var. capitata), vzgojenih na Laboratorijskem polju Biotehniške fakultete v Ljubljani. Škodljivci so pokazal majhno preferenco do zeljnih glav, ki imajo visoko vsebnost epikutikularnega voska. Med koncentracijo epikutikularnega voska in poškodovanimi listi je bila namreč ugotovljena močno značilna negativna povezava (r2 = -0.8399 za kapusovega bolhača, r2 = -0.7413 za pisano stenico in r2 = -0.7042 za tobakovega resarja). Cv.‘Holandsko pozno rdeče’, se je pokazal kot najbolj odporen kultivar ob napadu tobakovega resarja in pisane stenice, medtem, ko je bil cv. ‘Red Dinasty’ najmanj odporen proti napadu kapusovega bolhača.
Raziskava o vplivu nekaterih biofizikalnih (vsebnost epikutikularnega voska) in biokemičnih (obarvanost listov, skupni polifenoli in antioksidacijski potencial) dejavnikov na odpornost zelja ...(Brassica oleracea L. var. capitata) proti poškodbam, ki jih povzročajo kapusovi bolhači (Phyllotreta spp.), kapusove stenice (Eurydema spp.) in tobakov resar (Thrips tabaci), je potekala v letu 2010 na Laboratorijskem polju Biotehniške fakultete v Ljubljani. V poljski poskus je bilo vključenih 20 genotipov zelja in sicer 9 zgodnjih, 5 srednje zgodnjih in 6 srednje poznih genotipov (glede na dolžino rastne dobe), 3 rdeči in 17 belih genotipov (glede na barvo listov) ter 14 hibridov in 6 sort (glede na poreklo). Statistična analiza je pokazala, da biofizikalna in biokemična sestava listov zelja najbolj vpliva na odpornost te vrtnine na napad kapusovih bolhačev. Ti namreč kažejo šibko preferenco do zgodnjega in rdečega zelja ter do hibridov, ki imajo visoko vsebnost epikutikularnega voska (r2 = –0,6137, r2 = –0,7603 in r2 = –0,6812). Prav tako smo pri kapusovih bolhačih ugotovili močno negativno korelacijo med antioksidacijskim potencialom in obsegom poškodb pri srednje poznem zelju (r2 = –0,7185), pri rdečem zelju (r2 = –0,7811) in pri sortah zelja (r2 = –0,7802).
This unique resource presents current issues in sports and exercise medicine which outlines new areas of knowledge and provides updates on current knowledge in the broad field of sports and exercise ...medicine.Written by experts in their own sub-disciplines, Current Issues in Sports and Exercise Medicine discusses the physiology behind sports injuries and presents new and exciting approaches to manage such injuries. In addition, the book explores the relationship between exercise, health and performance by providing new information in areas such as exercise and immunity, the use of iron supplementation for performance, how exercise affects reactive oxygen species, and the proposed benefits of real and simulated altitude training.This book is well referenced and illustrated and will be a valuable resource for sports medicine specialists, physiologists, coaches, physical conditioners, physiotherapists and graduate and medical school students.
Članek prikazuje pogostost poškodb z ostrimi predmeti med zdravstvenimi delavci v operacijskem bloku Kliničnega centra Ljubljana. Prvi del članka prikazuje vzroke in možnosti za nastanek incidentov. ...Zdravstveni delavci smo na svojem delovnem mestu izpostavljeni možnostim okužbe ob stiku s kužnim pacientom, njegovimi telesnimi tekočinami, izločki in iztrebki. Tveganje je odvisno od intenzivnosti in pogostosti stikov, kar je odvisno tudi od narave dela ter možnosti za zaščito, dovzetnosti zdravstvenega delavca za okužbo in podobno. V drugem delu članka je opisana in razložena raziskava o incidentih v zadnjih dveh mesecih leta 2001. Raziskava je bila izvedena med 120 operacijskimi medicinskimi sestrami, medicinskimi sestrami pri anesteziji in bolničarji, zaposlenimi v operacijskem bloku Kliničnega centra Ljubljana. Rezultati raziskave kažejo na ozaveščenost zdravstvenih delavcev glede možnosti poškodb z ostrimi predmeti in na dejstvo, da se incidenti stalno dogajajo in nepravilno oskrbujejo.
Za potrebe načrtovanja varstva kostanjevih dreves smo v letih 2003 in 2004 ocenjevali poškodbe, ki jih povzročajo gosenice kostanjevega listnega zavrtača (Cameraria ohridella Deschka&Dimić) na ...listih divjega kostanja (Aesculus hippocastanum L.) v parku Tivoli v Ljubljani. V letu 2003 smo določili stopnjo napadenosti dreves s pomočjo računalniškega programa, v letu 2004 pa smo se odločili za vizualno ocenjevanje napadenosti listov. Liste smo glede na delež izvrtin uvrstili v osem razredov. Rezultati poskusa so pokazali, da so bila drevesa v letu 2003 bolj napadena s kostanjevim listnim zavrtačem kot v naslednjem letu. Površina izvrtin v avgustu 2003 je pri več kot 80% listov v povprečju zavzela od 10% do 50% njihove celotne površine, v septembru istega leta pa od 50% do 100%. V letu 2004 so bili listi napadeni s kostanjevim listnim zavrtačem v obeh mesecih pod 25%, vendar smo opazili, da so bili istočasno okuženi z listno sušico divjega kostanja (Guignardia aesculi Peck./Stev./) tudi do 50%. Pri spremljanju napadenosti listov glede na starost kostanjevih dreves v letu 2003 smo ugotovili, da obstajajo statistično značilne razlike med obravnavanji. Podatki kažejo, da so bila junija najmlajša drevesa manj napadena, v juliju pa bolj napadena od ostalih dveh obravnavanj. V avgustu in septembru so bila drevesa srednje starosti manj napadena od najmlajših in najstarejših dreves, a hkrati močno okužena z glivo Guignardia aesculi.
The impact of water-soluble carbohydrate composition in relation to damage levels of onion thrips (Thrips tabaci Lindeman), were studied under field conditions at the Experimental Field of the ...Biotechnical Faculty in Ljubljana on 7 cabbage cultivar (Brassica oleracea L. var. capitata). Onion thrips showed weak preference on cabbage heads with high amount of total carbohydrate, fructose and glucose and higher preference on heads with high concentration of sucrose. While amount of total carbohydrate, fructose and glucose were negatively correlated with damage levels (r2 = -0.7667; r2 = -0.6947; r2 = -0.8263), sucrose amount was not. There was a strong positively relationship between sucrose amount and the level of plants infested (r2 = +0.7378). The cv."Hinova", which had the highest amount of total carbohydrate, showed itself to be the most resistant to the onion thrips.
The plant spacing of early cabbage (Brassica oleracea L. var. capitata) was studied at the Experimental Field of the Biotechnical Faculty in Ljubljana, during the 2001 and 2002 growing season. The ...cultivars, which included "Vestri", "Parel", "Delphi", "Destiny" and "Hermes", were each spaced at 20, 30 and 40 cm within rows and 30 cm between rows or populations equivalent to 166,000, 108,000 and 82,000 plants ha-1. The experimental variables measured were marketable yield (per head and per hectare), yield characteristics (head diameter and head volume), quality characteristics (core volume, head density, soluble solids and dry matter) and onion thrips damage ratings. There was no interaction effect of cultivar and planting spacing on the measured variables. Marketable yield per head, head diameter and volume, core volume and head density generally increased as the within-row plant spacing increased, whereas, dry matter was significantly decreased at lower plant spacing. Soluble solids were not affected by plant spacing. The yield potential of cabbage was higher at cv. "Vestri" than at the other cultivars. The onion thrips damage rating was severe at the lowest plant spacing and contributed to the reduced yield. A higher damage rating was established in the cv. "Parel" but this didn't have a statistically significant influence on the weight loss of yield.
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