Plant Protection Science, 2012 (vol. 48), issue 4
Index of Volume 48 Author Index, Author Institution Index, Subject IndexIndex
editors
Plant Protect. Sci., 2012, 48(4):I-VII | DOI: 10.17221/6396-PPS 
Biological evidence for practical immunity of apricot cultivar Harlayne to Plum pox virus
Jaroslav POLÁK, Petr KOMÍNEK
Plant Protect. Sci., 2012, 48(4):143-148 | DOI: 10.17221/31/2011-PPS
Ten-year results of the practical immunity investigation of apricot cv. Harlayne are presented. Two-year-old trees of cv. Harlayne were inoculated by chip-budding with six different strains and isolates of Plum pox virus (PPV). PPV inoculated trees grew in the field and were evaluated from 2001 to 2011. No PPV symptoms appeared in the leaves of cv. Harlayne within ten years (2002-2011), and within eight years (2004-2011) in the fruits and stones. None of the six isolates of three different PPV strains was detected in the leaves and fruits by ELISA. Suckers of the rootstock Prunus myrobalana developed around cv....
Rhizobium japonicum as a biocontrol agent of soybean root rot disease caused by Fusarium solani and Macrophomina phaseolina
Rakib A. Al-Ani, Mustafa A. Adhab, Majda H. Mahdi, Hadi M. Abood
Plant Protect. Sci., 2012, 48(4):149-155 | DOI: 10.17221/16/2012-PPS
The activity of Rhizobium japonicum against the soil-borne pathogens Fusarium solani and Macrophomina phaseolina as causative agents of soybean root rot disease in both culture medium and soil was evaluated. Rhizobial culture filtrate caused an inhibition of the fungal radial growth of Fusarium solani and Macrophomina phaseolina on potato dextrose agar medium amended with the filtrate compared with control. The addition of rhizobial culture suspension to the soil contaminated by the two pathogens, Fusarium solani and Macrophomina phaseolina and their interaction, in pots, improved seed...
Variability in resistance to clubroot in European cauliflower cultivars
Pavel Kopecký, Ivana Doležalová, Martin Duchoslav, Karel Dušek
Plant Protect. Sci., 2012, 48(4):156-161 | DOI: 10.17221/58/2011-PPS
Fifty genotypes of cauliflovwer (Brassica oleracea var. botrytis) were evaluated for resistance to clubroot disease (Plasmodiophora brassicae Wor.) under controlled conditions in a plant growth chamber. The cultivars with the highest resistance were Brilant, Agora, and Bora, while the most susceptible were the cultivars White Top, White Fox, and Octavian. The variation in disease index is probably due to different pathogenicity rates of clubroot pathotypes and genetic heterogeneity of European cauliflower cultivars. The obtained results will be tested in an infested and non-infested field.
Characterising the genetic diversity of Pseudomonas syringae pv. syringae isolated from rice and wheat in Iran
Somayeh Dariush, Ali Akbar Ebadi, Maryam Khoshkdaman, Babak Rabiei, Ali Elahinia
Plant Protect. Sci., 2012, 48(4):162-169 | DOI: 10.17221/64/2011-PPS
Sheath rot of rice and leaf blight of wheat caused by Pseudomonas syringae pv. syringae are the important bacterial pathogens of rice and wheat in Iran. The randomly amplified polymorphic DNA (RAPD) method was used to investigate the genetic diversity of 60 strains of P. s. pv. syringae obtained from rice and wheat in different growth stages. Cluster analysis by UPGMA method showed that strains were grouped into two clusters. The AMOVA analysis indicated that about 18% of the total genetic variation existed between two populations of rice and wheat, which showed the lack of host specialization in P. s. pv....
Nematicidal activity of a biopolymer chitosan at different molecular weights against root-knot nematode, Meloidogyne incognita
Mohamed S. Khalil, Mohamed E. I. Badawy
Plant Protect. Sci., 2012, 48(4):170-178 | DOI: 10.17221/46/2011-PPS
The nematicidal activity of four molecular weights (2.27 × 105, 3.60 × 105, 5.97 × 105, and 9.47 × 105 g/mol) of a biopolymer chitosan was assayed against the root-knot nematode, Meloidogyne incognita, in vitro and in pot experiments. In laboratory assays, the nematode mortality was significantly influenced by exposure times and chitosan molecular weight. Low molecular weight chitosan (2.27 × 105 g/mol) was the most effective in killing the nematode with EC50 of 283.47 and 124.90 mg/l after 24 and 48 h of treatment, respectively. In a greenhouse bioassay, all the compounds...