scholarly journals First Notice of Phytophthora Stem Base Rot on Syringa Vulgaris in a Polish Field Nursery

Author(s):  
Leszek Orlikowski ◽  
Magdalena Ptaszek
Keyword(s):  
Biology ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 718
Author(s):  
Isabel Velada ◽  
Esther Menéndez ◽  
Rita Teresa Teixeira ◽  
Hélia Cardoso ◽  
Augusto Peixe

The author wishes to make an erratum to the published version of the paper [...]


2012 ◽  
Vol 61 (6) ◽  
pp. 1121-1129 ◽  
Author(s):  
L. Covarelli ◽  
G. Beccari ◽  
A. Steed ◽  
P. Nicholson
Keyword(s):  

2000 ◽  
Vol 137 (3) ◽  
pp. 213-221 ◽  
Author(s):  
G L BATEMAN ◽  
S G EDWARDS ◽  
J MARSHALL ◽  
L W MORGAN ◽  
P NICHOLSON ◽  
...  
Keyword(s):  

2003 ◽  
Vol 33 (5) ◽  
pp. 870-884 ◽  
Author(s):  
Rick G Kelsey ◽  
Gladwin Joseph

Sixteen days after a September wildfire, ethanol and water were measured in phloem and sapwood at breast height and the base of Pinus ponderosa Dougl. ex P. & C. Laws. with zero (control), moderate, heavy, and severe crown scorch. The quantity of ethanol increased with each level of injury, resulting in trees with severe scorch containing 15 and 53 times more phloem and sapwood ethanol, respectively, than controls. Ethanol concentrations in the sapwood and adjacent phloem were related, probably as a result of diffusion. Upward movement in xylem sap was most likely responsible for the relationship between sapwood ethanol concentrations at breast height and the stem base. As trees recovered from their heat injuries, the ethanol concentrations declined. In contrast, ethanol accumulated in dead trees that lost their entire crowns in the fire. Various bark and xylophagous beetles landed in greater numbers on fire-damaged trees than on controls the following spring and summer, suggesting that ethanol was being released to the atmosphere and influencing beetle behavior. Beetle landing was more strongly related to sapwood ethanol concentrations the previous September than in May. Sapwood ethanol measured 16 days after the fire was the best predictor of second-year mortality for trees with heavy and severe crown scorch.


Author(s):  
Meng-Chueh Lee ◽  
Kenneth-Yeonkone Ma ◽  
Yen-Chieh Ouvang ◽  
Mang Ou-Yang ◽  
Horng-Yuh Guo ◽  
...  

2015 ◽  
Vol 39 (3) ◽  
pp. 439-445 ◽  
Author(s):  
Laureen Michelle Houllou ◽  
Robson Antônio de Souza ◽  
Elizabete Cristina Pacheco dos Santos ◽  
José Jackson Pereira da Silva ◽  
Marta Ribeiro Barbosa ◽  
...  

ABSTRACTThe study was conducted with shoot tip explants of neem (Azadirachta indica A. Juss) to identify a viable regenerative process. Shoot tips were obtained from neem embryos cultured alternatingly in DKW medium supplemented with BAP and medium without hormones. Initial shoot development was influenced by cotyledon presence. Basal callus, excised from in vitro stem base, also presented organogenic potential. In some cases, plant lines, obtained from each seed, presented different characteristics. The most common characteristic observed in vitro was callus formation at the stem base. However, the rarest characteristics were stem callus formation and leaf senescence. The regenerated shoot tips were further subculture and rooted on a medium supplemented with IBA so that complete plants could be obtained. The rooted plants were transplanted to a greenhouse and successfully acclimatized. No significant differences in in vivo development were observed between neem plants from callus and from shoot tip propagation.


Author(s):  
Tanzina Baby ◽  
Banalata Das ◽  
Anjuman Ara ◽  
Shormin Choudhury ◽  
Jasim Uddain

The experiment was conducted at Sher-e-Bangla Agricultural University's Horticulture Farm, Sher-e-Bangla Nagar, Dhaka-1207, to determine the effect of pruning and GA3 on squash growth and yield over the period from November 2017 to February 2018 Three levels of pruning as P0 = No pruning (control), P1 = 1st pruning at 20 DAT (1st and 2nd leaves) and P2 = 2nd pruning at 30 DAT (3rd and 4th leaves) and four levels of GA3foliar application as G0 = No GA3 (control), G1 = 100 ppm GA3, G2 = 200 ppm GA3 and G3 = 400 ppm GA3 considered for the present study. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Considering growth parameters, pruning treatment had a significant effect on growth, yield contributing parameters and yield of squash except for stem base diameter and individual fruit weight. Regarding GA3 treatments, growth and yield parameters were significantly influenced except fruit diameter. In terms of the combined effect of pruning and GA3 treatments, all the studied growth and yield parameters were significantly influenced. The highest stem length (64.73 cm), number of leaves plant-1 (23.59), stem base diameter (2.09 cm), number of male flower plant-1 (8.69), number of female flower plant-1 (7.52), total number of fruits plant-1 (5.74), fruit length (22.42 cm), fruit diameter (6.15 cm), individual fruit weight (507.66 g), dry weight of fruit (6.61%), weight of fruits plant-1 (2914.33 g) and fruit yield ha-1 (29.14 t) were also found from the treatment combination of P1G1 compared to the other treatment combination. Hence, we can summarize that 1st pruning at 20 DAT (1st and 2nd leaves) with 100 ppm GA3 given the maximum output in terms of yield compared to other treatments.


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