In Poland, about 20% of forest nurseries use irrigation water coming from natural superficial reservoirs, presumed to be the first source of infection caused by harmful pathogens belonging to the Oomycota class, especially Phytophthora genus and Pythium genus. The forest nursery is the only place where forest managers can react before pathogens leave it with asymptomatic plants or soil attached...

Sequence analysis of the ribosomal DNA internal transcribed spacers (ITS) was used to establish phylogenetic relationships among 23 isolates of Pythium insidiosum, the etiological agent of pythiosis in mammals. The isolates were divided into three distinct clades that exhibited significant geographic isolation. Clade I consisted of isolates from North, Central, and South America, while clade II...

ABSTRACT Planting the cotton cv. Sure-Grow 747 in cotton seedling disease plots during the 2001 growing season resulted in high levels of preemergence damping-off among the seedlings. Four cotton pathogens, Pythium aphanidermatum, P. ultimum, an unidentified Pythium sp., and Rhizopus oryzae, were isolated from diseased seed embryos and seedlings. Disease incited by the Pythium spp. could be con...

The structure of hyphal walls of Pythium debaryanum was investigated by electron microscopy of shadowed replicas and thin sections, before and after digestion by snail gut enzymes or by 1 n HCl at 100 C for 1 hr, and by X-ray diffraction. We found that the wall had two phases, one composed of microfibrils of unknown composition and a second consisting of an amorphous matrix, part of which stain...

OBJECTIVE To evaluate the efficacy of fish as predators of the Aedes aegypti larvae in laboratory conditions. METHODS The male and female of five different fish were included in the experiment. The tests to measure their consumption ability lasted five weeks for each species. Each trial involved four test tanks and four control tanks. Two control tanks contained just one fish, and the other t...

In the present study, nested polymerase chain reaction-single-strand conformation polymorphism (nested PCR-SSCP) was used for detection of point mutations in flower color genes in Salvia splendens. Totally 916 bp of Ss5MaT1 cDNA segments were obtained in eight varieties of Salvia splendens flowers by RT-PCR. Four sets of specific primers were synthesized according to the obtained cDNA cloning f...

Feeding Ecology and Pest Status of the Mole rats (Tachyoryctes splendens) in Farmland, Masha, Southwest Ethiopia Yidnekachew Arega Terefe Addis Ababa Univertsity, 2017 A study on the abundance, distribution, feeding habit, pest status and impacts of mole rats on agricultural productivity was carried out on the farmlands of Masha during July, 2016 ─ February, 2017. Two study sites (Beto and Gemb...

This study investigated the effects of nesting status and the presence of an audience on 11-ketotestosterone (11KT) levels in male Siamese fighting fish, Betta splendens. Prior studies have demonstrated that both nesting status, an indicator of territory-holding power and reproductive state, and the sex of a conspecific audience lead to differences in male behavior during aggressive encounters....