scholarly journals Monitoring the Edible Chestnut Bark Cancer (Cryphonectria Parasitica) and its Prevention and Combat Measures in the Pedoclimatic Conditions of the Baia Mare Basin

2018 ◽  
Vol 75 (2) ◽  
pp. 117-118
Author(s):  
Lucia MIHALESCU ◽  
Zorica VOŞGAN ◽  
Flavia POP ◽  
Anca DUMUŢA ◽  
Aurel MAXIM
Keyword(s):  
Health Status ◽  
Chemical Method ◽  
Cryphonectria Parasitica ◽  
Tree Health ◽  
Chestnut Tree ◽  
Baia Mare ◽  
Primary Assessment

Our research aims to assess the chestnut tree health status in three various locations: Baia Mare, Tauti Magheraus, Baia Sprie, in order to find the most efficient methods to prevent and to combat the bark cancer which develops in the clime conditions of Baia Mare basin. The primary assessment was performed through the determination of the attack degree (AD %), of its frequency (F%) and its intensity (I%) . We took in observation 10 chestnut trees from each location. We determined the number and size of both trunk and branches lesions for each chestnut tree. The intensity of the attack in the three studied areas ranked from the highest intensity 47.5% for Baia Sprie location followed by the intensity of 33.0 % for Tautii Magheraus, to the intensity of 26.5% for Baia Mare. Our analysis performed after the administration of the combat chemical method, we found that this measure was not efficient because the infection did not diminish; thus we recommend the dry chestnut tree elimination, its hygiene cuts, using the biologic combat.

scholarly journals In Vitro Studies Regarding the Control of Cryphonectria parasitica with Hydroalcoholic

2012 ◽  
Vol 69 (1) ◽  
Author(s):  
Carmen Emilia PUIA ◽  
Daniela Andreea GRIGORESCU ◽  
Raluca Vasilica MICLEA
Keyword(s):  
Plant Extracts ◽  
Castanea Sativa ◽  
Colony Growth ◽  
Cryphonectria Parasitica ◽  
Great Success ◽  
Area Formula ◽  
Chestnut Tree ◽  
Baia Mare ◽  
Endothia Parasitica

Cryphonectria parasitica  (Murr.) Bar [syn. Endothia parasitica (Murr. And.] (anamorf: Endothiella sp .) is the causal agent of chestnut bark disease or chestnut blight. This disease produced great damages throughout the world, it has nearly eliminated the American chestnut tree ( Castanea dentata (Marsh.) Borkh.) from its natural range and has heavily affected the European chestnut tree ( Castanea sativa (P.) Mill). Successful protection against Cryphonectria parasitica is a very difficult problem because the conventional control methods against the fungus are not applicable with a great success because of the extreme fungus pathogenity and on the other hand because of the characteristics of sites and host plants. In our experiments the isolates of C. parasitica were picked from the Baia Mare area and for the control with plant extracts the isolates were inoculated on PDA medium that contained the extract using the poison food technique. The different extracts in three different concentrations were tested in 80 mm diameter Petri plates incubated at 25ºC and assessed after three, six and nine days of incubation. The fungistatic effect of the extracts was established by examining the presence or the absence of the colony growth. The colonies were measured establishing the colony area that appeared on the treated plates using the ellipse area formula. The results were expressed as the inhibition percent of the tested plant extracts.

A CHEMICAL METHOD FOR THE DETERMINATION OF 2-HYDROXYOESTRONE IN HUMAN URINE

1973 ◽  
Vol 71 (4_Suppl) ◽  
pp. S110
Author(s):  
H. P. Gelbke ◽  
R. Knuppen
Keyword(s):  
Human Urine ◽  
Chemical Method

scholarly journals A CHEMICAL METHOD FOR THE DETERMINATION OF PTEROYLGLUTAMIC ACID AND RELATED COMPOUNDS

1947 ◽  
Vol 168 (2) ◽  
pp. 705-710
Author(s):  
B.L. Hutchings ◽  
E.L.R. Stokstad ◽  
J.H. Boothe ◽  
J.H. Mowat ◽  
C.W. Waller ◽  
...  
Keyword(s):  
Chemical Method ◽  
Pteroylglutamic Acid ◽  
Related Compounds

scholarly journals Diversity of microfungi on branches of Castanea sativa in Slovakia

2013 ◽  
Vol 58 (2) ◽  
pp. 741-746 ◽  
Author(s):  
Katarína Adamčíková ◽  
Gabriela Juhásová ◽  
Marek Kobza ◽  
Emília Ondrušková
Keyword(s):  
Castanea Sativa ◽  
Cryphonectria Parasitica ◽  
Microscopic Fungi ◽  
Chestnut Tree ◽  
New Localities ◽  
Castanea Sativa Mill

Abstract Localities in Castanea sativa Mill. plantations were visited in a study aimed at identifying the mycoflora of C. sativa in Slovakia [excluding Cryphonectria parasitica (Murr.), Barr for which much data is available]. Samples from chestnut tree branches and stems were examined visually and microscopically. Seven species of microfungi were recorded, three with their anamorphs. Coryneum modonium (Sacc.) Griffon & Maubl. and Phomopsis castaneae Woron. were the most common. Libertella quercina Tul. & C. Tul. was identified in both states (anamorph and teleomorph) at two new localities. The records of Gloniopsis praelonga (Schwein.) Underw. & Earle and Dothidotthia celtidis (Ellis & Everh.) M. E. Barr are the first for Slovakia. These species were rare, found only in one locality. Two microscopic fungi were detected: Valsa ambiens (Pers.) Fr. [Cytospora ambiens (Nitschke) Sacc.] and Diplodina castaneae Prill. & Delacr.

scholarly journals A comparison of different methods to remove dissolved oxygen: Application to the electrochemical determination of imidacloprid

2015 ◽  
pp. 149-155 ◽  
Author(s):  
Ana Djurovic ◽  
Zorica Stojanovic ◽  
Snezana Kravic ◽  
Zvonimir Suturovic ◽  
Tanja Brezo ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Chemical Method ◽  
Sodium Sulfite ◽  
Physical Method ◽  
Electrochemical Determination ◽  
Carbon Electrode ◽  
Nitrogen Stream ◽  
Sulfite Ion ◽  
Sulfite Solution

This study compares different methods for the removal of oxygen from the solution prior to the chronopotentiometric determination of the insecticide imidacloprid on glassy carbon electrode. The research included the application of the chemical method involving addition of sulfite ion, and the physical method of purging the sample with nitrogen stream, as well as their combination. By comparing analytical signals of imidacloprid, chemical method showed almost the same efficiency as conventional physical method, while the best reproducibility was achieved by applying chemical method with addition of the saturated sodium sulfite solution. The method is very simple and can be applied for deoxygenation of the solution prior to the chronopotentiometric analysis. The application of the chemical deoxygenation significantly shortened duration of the chronopotentiometric analysis of imidacloprid from approximately 15 min to 1 min.

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