Orange trees (Citrus × sinensis (L.) Osbeck) are the third-most cultivated citrus fruit species in Chile. In recent years, several three orange orchards of ‘Lane late’ and ‘Fukumoto’ cultivars grafted on ‘Robidoux’ trifoliate (Poncirus trifoliata Raf.) have shown chlorosis, canopy reduction, wilting, root necrosis, defoliation, plant death symptoms. This study aims to characterize morphological symptoms observed diseased central Chile identify fungal pathogens that involved. Isolation...

Distribution of Fusarium crown rot (FCR) and common root (CRR) pathogens associated with wheat (Triticum aestivum) in 91 fields Montana were determined during the 2008 2009 crop seasons using real-time quantitative polymerase chain reaction (qPCR) conventional isolation methods. Correlations (P < 0.001) found between detection methods for both diseases. FCR was detected 57% CRR 93% surveyed. Percent incidence based on from individual tillers Bipolaris sorokiniana (15%), F. culmorum (13%),...

Crown rot pathogens are associated with higher losses for wheat crop farmers, but information about the distribution and prevalence of these in Chile is inadequate.Distribution (Triticum aestivum L.) crown were examined a survey 48 commercial fields from December 2011 to February 2012 southern Chile.These located between Collipulli (37º56'00" S; 72°26'39" W) Purranque (40º50'30" 73°22'03" W).Severity disease was determined through visual assessment first internode 20 tillers obtained each...

Fusarium crown rot (FCR) of wheat (Triticum aestivum L.) is a perennial problem for producers worldwide. Integration the different management tools was assessed to determine new strategy reduce FCR. Difenoconazole–mefenoxam fungicide seed treatment reduced FCR severity 29–50% in glasshouse trials, while with Bacillus pumilis isolate 314-16-5 and Trichoderma harzianum T-22 provided control statistically than untreated or treated L324-92 Pseudomonas fluorescens 2-79. Assessment resistance...

Hazelnut (Corylus avellana L.) is the second most cultivated nut crop in Chile. Pathogens associated with fungal trunk diseases (FTD) pose a serious threat to this crop, because these fungi colonize wood causing loss of productivity and eventually death plants (Martino et al., 2025). During Spring 2018 2020, FTD symptoms such as necrosis, vascular discoloration branches, cankers, wilted branches were detected survey conducted 24 hazelnut orchards located between Maule Araucanía regions,...

Fusarium crown rot disease: biology, interactions, management and function as a possible sensor of global climate change.Cien.Inv.Agr.40(2):235-252.Wheat crops are commonly affected by the dryland root complex (DLRRC) under dry semiarid conditions.This is associated with seedling blight, rotting roots, crowns stems wheat plants.Several pathogens this complex, but disease (FCR) most common worldwide importance.Increased drought frequency changes in rainfall regimes change may increase...

Seed treatments with antagonistic bacteria could reduce the severity of crown and root rot diseases in wheat crops. The objective this study was to evaluate potential activity a bacterial consortium three Chilean strains Pseudomonas protegens against pathogens Gaeumannomyces graminis var. tritici, Rhizoctonia cerealis, Fusarium culmorum. Two field experiments were carried out on artificially infested soil during two consecutive seasons (2016-2017 2017-2018) an Andisol southern Chile. Control...

Lentil is cultivated in Chilean Mediterranean drylands, areas with soils that are nutrient depleted and eroded. Inoculation of lentil rhizobia co-inoculation growth promoting rhizobacteria would allow higher biomass an opportunity for early nodulation increased nitrogen fixation. The objective this research was to select rhizosferic bacteria (PGPR) from lentils evaluate their effect on rhizobia. Sixty three isolates where obtained nine the mediterranean area. These were fingerprinted through...

Due to the smaller size of berries plants and some vegetables, their production in containers has grown worldwide. To understand effect increasing doses ammoniacal N, we evaluated production, firmness fruits concentration macronutrients leaves four blueberry (Vaccinium corymbosum L.) cultivars (Duke, Legacy, Cargo, Suziblue) south central Chile. All were pots with substrate during third growing season. The results showed an interaction N dose cultivar most parameters evaluated, except for...

Fusarium pseudograminearum and Bipolaris sorokiniana are causal agents of crown rot common root rot, respectively, wheat cause significant losses worldwide. Understanding the population dynamics between these two pathogens at late stages development is needed. The effect F. B. inocula applied singly or in mixtures seeding to spring ‘Hank’ was measured using seedling stand, grain yield, pathogen populations first internode heading, milk, harvest stage real-time quantitative polymerase chain...

Huanglongbing (HLB) is one of the world's worst diseases citrus trees. The research was conducted to characterize positive samples two local varieties, 'Kinnow' mandarin (Citrus reticulata Blanco) and 'Mosambi' orange (C. sinensis (L.) Osbeck), based on morphological, physical biochemical characters. Physical parameters greening infected healthy both cultivars were significantly different. Citrus fruits lopsided half full green in HLB trees compared healthy. leaves small narrow. Fruit...

Boeremia exigua var. is a recurrent pathogen causing root rot in industrial chicory. Currently, there no chemical or varietal control for this disease, and thus, management strategies need to be developed. This study determined the biocontrol effect of strains Pseudomonas protegens bacteria with antimicrobial compounds on fungus B. under vitro, vivo, field conditions. In addition, colonization by these was estimated phlD-specific PCR-based dilution end point assay. Eighteen isolates spp were...

Fungal trunk disease (FTD) poses a significant threat to hazelnut (Corylus avellana L.) production worldwide. In Chile, the fungus Diplodia mutila, from Botryosphaeriaceae family, has been frequently identified causing this in Maule and Ñuble Regions. However, control measures for D. mutila remain limited. This research aimed evaluate effectiveness of chemical biological fungicides against under vitro, controlled pot experiment, field conditions. An vitro screening 30 was conducted. The...

The objective of this experiment was to evaluate the effect four ammonium N rates on fruit yield and leaf nutrient concentration in blueberry (Vaccinium corymbosum) cultivars grown a substrate. conducted with increasing sulfate (NH4–N) 0, 100, 200, 300%), using plants two-year-old pot-grown nine highbush cultivars, 35 liters (L) pots soilless media, consisting coconut fiber, peat, perlite at 2:2:1 (v/v). Leaf affected by cultivar nitrogen (N) rate. Increasing rate increased N, P...

In southern Chile, forage corn (Zea mays L.) is grown for feeding animals in milk diaries and livestock production. December 2010, plants with small circular spots on leaves were collected from three fields located Río Negro (Los Lagos region). Symptoms began as small, white to brown of 5 10 mm different parts the leaf necrotic tissue irregular burgundy margins border tip leaf. Estimated visual severity was ~5 40% each field samples. Twelve blocks taken edge infected leaves, surface...

Extracts rich in saponins from Quillaja saponaria Mol. and populations of rhizobacteria the genus Pseudomonas, which produce antimicrobial compounds, have been associated with reduction fungus Gaeumannomyces graminis var. tritici, causal agent take-all disease, is responsible for severe loss wheat (Triticum aestivum L.) crops worldwide. However, there a limited background on interaction between these bacteria natural triterpenoids. The aim this research was to assess effect saponin extract...

In Chile, the planted area of European hazelnut (

Legacy and Duke are the main blueberry (Vaccinium corymbosum L.) cultivars grown in Chile, with 32.8% of total Chilean cultivated area this fruit. The market demands fruit firmness, size, weight, quality attributes, which improved by some agronomic management practices such as winter pruning. present study evaluated effect on attributes yield five bud load levels, regulated pruning during two consecutive seasons, ʻLegacyʼ ʻDukeʼ. was conducted three commercial orchards under different...

Silverleaf caused by the basidiomycete Chondrostereum purpureum affects numerous woody species, including fruit tree crops like apple, resulting in wood necrosis and foliar silvering. There are no curative alternatives for this disease, its management is prevention methods. Therefore, aim of study was to develop a rapid diagnostic tool detection identification C. directly from tissues help distinguish pathogen other basidiomycetes that commonly found on apple. The silverleaf isolated...