Variation in susceptibility of wheat parts to major fusarium head blight pathogens

Fusarium head blight (FHB) of wheat is caused by a complex of pathogens with
F graminearum, F. culmorum, F. poae, F. avenaceum and F. tricinctum being
the most common worldwide. Besides ears, the species have been isolated from
wheat roots, foot, stems, ears and leaves. Greenhouse studies were carried out
to investigate differences in susceptibility of wheat parts - leaves, stems,
kernels and spikelets - to the five Fusarium species inoculated at mid-anthesis.
Tissue susceptibility was assessed by establishing Fusarium spp. re-isolation

Influence of cropping systems and crop residues on the occurrence Of fusarium head blight of wheat (triticum aestivum l.) and associated Mycotoxins in narok county, kenya

Wheat (Triticum aestivum L.) is an important cereal grain cultivated worldwide. Fusarium head
blight (FHB) and the associated mycotoxins pose a threat to food security and safety in Kenya,
as they cause quantitative and qualitative yield losses, deterioration of grain nutritional value and
human and animal health risks. This study assessed the effect of cropping systems and the role of
soil and crop residues on the occurrence of FHB and associated mycotoxins in Narok County of

Management of fusarium head blight of wheat through host resistance and microbial agents

Fusarium head blight (FHB) is a world wide disease of wheat and other small grain cereals
caused by several Fusarium species that reduce yield quantity and quality. A study covering 120
farms was done in July-November, 2008 in Nyandarua North, Imenti North and Narok districts
of Kenya to determine level of fungal genera inoculum and mycotoxin contamination. FHB
incidence was determined as the proportion of diseased heads perl OM2. Isolation of the fungus
was done from stems, heads, grains, heads and soil samples on PDA. In vitro activity of

Occurrence of fusarium headblight of wheat in Nakuru district and its management using biocontrol agents

Fusarium head blight (FHB) has recently re-emerged as a devastating disease of small grains
throughout the world. Different management strategies have been tried but control of the
disease has not yet been achieved. Survey for the occurrence of FHB of wheat was carried
out during the 2006 cropping season in five agro-ecological zones of Nakuru. The disease
incidence was determined as the number of blighted heads over the total number of heads in
a 10m2 while severity was determined as the proportion of the spikelets bleached. Wheat and

Fusarium culmorum: Infection process, mechanisms of mycotoxins production and their role in pathogenesis in wheat

Fusarium culmorum is an important pathogen of wheat causing seedling blight, foot rot, and head blight (Fusarium head blight (FHB)) or scab. The pathogen is dominant in cooler areas like north, central and western Europe. The fungus reproduces asexually by means of conidia, which form the main mode of dispersal. Head blight is by far the most serious concern of Fusarium infection on pre-harvest wheat and other small grain cereals. The significance of F. culmorum in wheat production is attributed to both head blight and mycotoxin contamination of the grain harvested from infected ears.

Efficacy of Biological Control and Cultivar Resistance on Fusarium Head Blight and T-2 Toxin Contamination in Wheat

Laboratory and green house experiments were carried out to evaluate the efficacy of fungicides, biological agents and host resistance in managing FHB and the associated T-2 toxin. In vitro activity of fungicides and antagonists was de-termined by paired culture method. Effect of microbial agents on FHB severity and mycotoxin content was determined by co-inoculating F. graminearum and F. poae with Alternaria spp., Epicoccum spp. and Trichoderma spp.

Occurrence of mycotoxin producing Fusarium species and other fungi on wheat kernels harvest in selected districts of Kenya

Wheat samples collected from 5 wheat growing districts of Kenya were investigated for contamination by
different fungi. Kernels were plated on agar media and the fungi that grew were identified by cultural and morphological
characteristics to genus level. Fusarium isolates were identified to species level and isolates of F. graminearum were
tested for mycotoxin production in culture. The major genera of fungi isolated according to decreasing frequency were

Characterization of Fusarium culmorum isolates by mycotoxin production and aggressiveness to winter wheat

Twenty seven isolates of Fusarium culmorum were investigated for their aggressiveness on ears and leaves of wheat as well as for mycotoxin production by inoculating winter wheat (cv. Contra) in field trials conducted at Hennef, Germany, in 1996 . Additionally, in vitro mycotoxin production was determined on autoclaved cracked corn [maize]. Head blight and the negative effect of F. culmorum on 1000-grain weight greatly varied among isolates (30-90% of ears bleached; 14-61% reduction of 1000-grain weight).

Occurence of Fusarium species and associated T2-Toxin in Kenyan Wheat

Survey covering 120 wheat fields was conduc- ted in three wheat-growing districts of Kenya during the 2008 cropping season to determine the incidence of Fusarium head blight (FHB) and T2-toxin contamination in grain. FHB incidence was determined as the number of blighted ears per 10 m2. Information gathered included wheat production practices, rainfall and temperature data. Fungal pathogens were isolated from wheat stems, heads, straw, grains and soil and identified based on cultural and morphological characteristics.

Effects of Mulch and Potato Hilling on Development of Foliar Blight (Phytophthora infestans) and the Control of Tuber Blight Infection

Foliar and tuber blight caused by Phytophthora infestans accounts for
significant losses in potatoes in field and storage. Nevertheless, limited research has
been published on the effects of cultural practices on late blight control. Field
experiments were conducted in two years on Howard gravely loam soil in New York
State to evaluate the effectiveness of mulching using oat straw and hilling in
preventing tuber blight infection for cvs Allegany and Katahdin. Potato hilling and