scholarly journals Susceptibility of novel Italian rice varieties to panicle blast under field conditions

2020 ◽  
Author(s):  
Gabriele Mongiano ◽  
Patrizia Titone ◽  
Simone Bregaglio ◽  
Luigi Tamborini
Keyword(s):  
Plant Protection ◽  
Stem Elongation ◽  
Disease Incidence ◽  
Public Institutions ◽  
Field Conditions ◽  
Rice Varieties ◽  
Panicle Blast ◽  
Protection Strategies ◽  
The Common ◽  
Visual Assessments

AbstractA panel of 48 of Italian rice varieties recently included in the Common Catalogue of Agricultural Species was evaluated for susceptibility to rice blast (Magnaporthe oryzae B. Couch) in open field conditions. Trials were performed under highly favourable conditions for the pathogen, and visual assessments focused on the severity and incidence of panicle blast symptoms. Only 8% of newly released varieties were classified as resistant, whereas 40% were highly susceptible. Our results confirmed that a fungicide treatment with tricyclazole reduces the disease incidence and severity and that the effect is measurable up to six weeks after treatment. A double application of tricyclazole at stem elongation and booting stage was more effective than the single application at booting. This study provides ready-to-use information to support rice growers in variety choice and planning of plant protection strategies, as well as public institutions in the emanation of guidelines for integrated pest management.

scholarly journals Susceptibility of novel Italian rice varieties to panicle blast under field conditions

2021 ◽  
Author(s):  
Gabriele Mongiano ◽  
Patrizia Titone ◽  
Simone Bregaglio ◽  
Luigi Tamborini
Keyword(s):  
Field Conditions ◽  
Rice Varieties ◽  
Panicle Blast

scholarly journals Field assessment of a pulse width modulation (PWM) spray system applying different spray volumes: duty cycle and forward speed effects on vines spray coverage

2021 ◽  
Author(s):  
Marco Grella ◽  
Fabrizio Gioelli ◽  
Paolo Marucco ◽  
Ingrid Zwertvaegher ◽  
Eric Mozzanini ◽  
...  
Keyword(s):  
Precision Agriculture ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Plant Protection ◽  
Plant Protection Products ◽  
Field Conditions ◽  
Advanced Technology ◽  
Real Field ◽  
Spray Application ◽  
Spray System

AbstractThe pulse width modulation (PWM) spray system is the most advanced technology to obtain variable rate spray application without varying the operative sprayer parameters (e.g. spray pressure, nozzle size). According to the precision agriculture principles, PWM is the prime technology that allows to spray the required amount where needed without varying the droplet size spectra which benefits both the uniformity of spray quality and the spray drift reduction. However, some concerns related to the effect of on–off solenoid valves and the alternating on/off action of adjacent nozzles on final uneven spray coverage (SC) have arisen. Further evaluations of PWM systems used for spraying 3D crops under field conditions are welcomed. A tower-shaped airblast sprayer equipped with a PWM was tested in a vineyard. Twelve configurations, combining duty cycles (DC: 30, 50, 70, 100%) and forward speeds (FS: 4, 6, 8 km h−1), were tested. Two methodologies, namely field-standardized and real field conditions, were adopted to evaluate the effect of DC and FS on (1) SC variability (CV%) along both the sprayer travel direction and the vertical spray profile using long water sensitive papers (WSP), and (2) SC uniformity (IU, index value) within the canopy at different depths and heights, respectively. Furthermore, the SC (%) and deposit density (Nst, no stains cm−2), determined using short WSP, were used to evaluate the spray application performances taking into account the spray volumes applied. Under field-controlled conditions, the pulsing of the PWM system affects both the SC variability measured along the sprayer travel direction and along the vertical spray profile. In contrast, under real field conditions, the PWM system does not affect the uniformity of SC measured within the canopy. The relationship between SC and Nst allowed identification of the ranges of 200–250 and 300–370 l ha−1 as the most suitable spray volumes to be applied for insecticide and fungicide plant protection products, respectively.

Some Issues of Morbidity with Temporary Incapacity for Work in the Ural Federal District

2021 ◽  
pp. 37-44
Author(s):  
AS Shastin ◽  
VG Gazimova ◽  
OL Malykh ◽  
TS Ustyugova ◽  
TM Tsepilova
Keyword(s):  
Public Health ◽  
Russian Federation ◽  
Disease Incidence ◽  
Federal District ◽  
Incidence Rates ◽  
Statistical Information ◽  
Working Age ◽  
The Russian Federation ◽  
The Common ◽  
Working Age Population

Introduction: In the context of a decreasing size of the working-age population, monitoring of the health status and disease incidence in this cohort shall be one of the most important tasks of public and occupational health professionals. Health risk management for the working population in the Russian Federation requires complete and reliable data on its morbidity, especially in view of the fact that its average age demonstrates a stable growth. It is, therefore, crucial to have precise and consistent information about the morbidity of the working-age population. Objective: The study aimed to assess incidence rates of diseases with temporary incapacity for work in the constituent entities of the Ural Federal District of the Russian Federation. Materials and methods: We reviewed data on disease incidence rates published by the Federal State Statistics Service in the Common Interdepartmental System of Statistical Information, Section 15.12, Causes of Temporary Disability, and Section 2.9.I.4, Federal Project for Public Health Promotion. The constituent entities under study were ranked according to the number of cases and days of temporary incapacity per 100 workers and E.L. Notkin scale was used to determine grade the incidence. The statistical analysis was performed using STATISTICA 10 software. Long-term average values of certain indicators, median values, standard deviation (σ) and coefficients of variation were estimated. The difference in the indices was assessed using the Mann-Whitney test. Results: Compared to 2010, incidence rates of diseases with temporary incapacity for work in the constituent entities of the Ural Federal District in 2019 demonstrated a significant decline. The sharp drop was observed in 2015. We also established that the Common Interdepartmental System of Statistical Information contains contradictory information on disease incidence. Conclusion: It is expedient to consider the issue of revising guidelines for organization of federal statistical monitoring of morbidity with temporary incapacity for work and to include this indicator in the system of public health monitoring.

scholarly journals Evaluation of Short Duration Drought Tolerant Rice Varieties in Drought Prone Areas of Subarnapur District of Odisha

2020 ◽  
pp. 21-26
Author(s):  
S. Pradhan ◽  
F. H. Rahman ◽  
S. Sethy ◽  
G. Pradhan ◽  
J. Sen
Keyword(s):  
Short Duration ◽  
Upland Rice ◽  
Plant Protection ◽  
Block Design ◽  
Rice Variety ◽  
Rice Varieties ◽  
Agronomic Practices ◽  
Drought Tolerant ◽  
Randomized Block Design ◽  
Sowing Seed

A study was conducted in farmer’s field through technology demonstrations during Kharif season of 2018 and 2019 in Subarnapur district of Odisha to recommend the most suited short duration drought tolerant upland rice variety particular to the locality. Six different varieties like Sahabhagi dhan, Mandakini, Jogesh, DRR-44, and DRR-42 & Khandagiri were taken with four replications in Randomized Block Design in both years. Technology demonstration included not only the improved short duration varieties, but also a package of good agronomic practices viz. line sowing, seed treatment with Bavistin, proper fertilization with dose @ 80:40:40 NPK/ha, pre emergence herbicide application with pretilachlor, needful manual weeding and  need based plant protection chemicals. The results of demonstration showed that farmers could increase rice productivity notably by adopting improved variety Sahabhagi dhan and DRR-44. These varieties recorded higher grain yields of 64% and 46%, respectively, and fetched a sum return of Rs 25620 and Rs 25275 over farmers’ local variety Khandagiri.

scholarly journals Combined Influence of Chitosan and Calcium Chloride on Fusarium Dry Rot Disease Under Field Conditions

2020 ◽  
Vol 14 (1) ◽  
pp. 339-344
Author(s):  
Sabah R. Mohammed ◽  
Ivan D. Eskov ◽  
Elsayed M. Zeitar
Keyword(s):  
Plant Height ◽  
Calcium Chloride ◽  
Tuber Yield ◽  
Foliar Application ◽  
Growth Parameters ◽  
Disease Incidence ◽  
Field Conditions ◽  
Dry Rot ◽  
Fusarium Dry Rot ◽  
Rot Disease

Background: Fusarium dry rot disease caused by Fusarium sambucinum Fuckel (F. sambucinum) can infect the potato tubers in the field and during storage. Yield losses by F. sambucinum reach 60%. Traditional methods to control Fusarium dry rot are fungicides application, which led to developing many isolates resistant to these fungicides. Objective: The aim of this study is to evaluate the effect of calcium chloride (CaCl2) and chitosan, alone or in combination, on plant development, tuber yield, and Fusarium dry rot disease incidence under field conditions. Methods: Soil inoculated with F. sambucinum before planting. We treated the seed tubers with CaCl2 (0.5 or 1%), chitosan 0.5%, or both. The foliage was sprayed twice with CaCl2 (0.5 or 1%), 0.1% chitosan, or both. During the vegetation period, growth parameters, such as germination (%), plant height (cm), and branches number per plant, were measured. At harvest, we calculated the total and the marketable number of tubers and tuber yield. In addition, during storage, we assessed the incidence of Fusarium dry rot disease on tubers. Results: Results revealed that combined pre-planting application with 1% CaCl2 and 0.5% chitosan with 2 hours intervals, then spraying foliar with 1% CaCl2 and 0.1% chitosan twice with ten days intervals starting at 40 days after planting resulted in: a) increasing the germination, enhancing the growth parameters such as plant height and branches number per plant; b) enhancing the marketable tuber yield by 75.2 and 97.6% in Sante and Kolobok varieties, respectively; c) reducing Fusarium dry rot disease incidence by 61.9-72.7%. Conclusion: The work highlighted that the combined pre-planting and foliar application of CaCl2 and chitosan might be recommended for potato producers to reduce the incidence of Fusarium dry rot disease and augment yields.

scholarly journals MANAGEMENT OF APHID BORNE POTATO VIRUS Y (PVY) THROUGH CHEMICAL AND BIO-CHEMICAL METHODS

2017 ◽  
Vol 2 (2) ◽  
pp. 159
Author(s):  
Altaf Hussain ◽  
Muhammad Arif ◽  
Aqleem Abbas
Keyword(s):  
Disease Severity ◽  
Potato Virus Y ◽  
Disease Incidence ◽  
Field Conditions ◽  
Individual State ◽  
Chemical Methods ◽  
Neem Extract ◽  
Severity Level ◽  
Level 1 ◽  
Disease Severity Level

The aim of this study was the management of potato virus Y (PVY) in potato cv. Desiree through chemical and non-chemical methods. The experiment was carried out at the New Developmental Farm (NDF), The University of Agriculture, Peshawar during spring season, 2014 under field conditions. One of the major objectives of the experiment was to assess the effectiveness of the treatments application in their individual state as well as in combinations under field conditions. The treatments were mineral oil, insecticide, biocide and their combinations. Among various treatments, Diver was effective with disease severity level (1) and % disease incidence (40) in individual state and in combination (Diver + Confidor) and (Diver + Confidor + Neem extract) gave good results with % disease incidence (33.33) and with disease severity level (1). Neem extract was found to be less effective when used individually with % disease incidence (56.66) and with disease severity level (3), whereas Confidor when applied individually was more effective than Neem extract with % disease incidence (50) and with disease severity level (2). Moreover Diver in combination with Neem extract was found to be less effective in management of PVY as compared to Diver in combination with Confidor with % disease incidence (40) and disease severity level (1). Three aphid species were found in the field i.e Myzus persicae (Sulzer), Aphid gossypii (Glover) and Macrosiphum euphorbiae (Thomas). In case of aphid’s population, Confidor was more effective in reducing aphid’s population as compared to Diver and Neem extract. Finally, it can be concluded that Diver alone was more effective in the management of PVY. However in combination, Diver with Confidor significantly managed PVY under field conditions

scholarly journals Synergistic Antifungal Activity of Graphene Oxide and Fungicides against Fusarium Head Blight In Vitro and In Vivo

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2393
Author(s):  
Xiuping Wang ◽  
Fei Peng ◽  
Caihong Cheng ◽  
Lina Chen ◽  
Xuejuan Shi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Plant Pathogens ◽  
Antimicrobial Agents ◽  
Plant Protection ◽  
Disease Incidence ◽  
Agricultural Science ◽  
Plant Diseases ◽  
Synergistic Activity

Plant pathogens constantly develop resistance to antimicrobial agents, and this poses great challenges to plant protection. Therefore, there is a pressing need to search for new antimicrobials. The combined use of antimicrobial agents with different antifungal mechanisms has been recognized as a promising approach to manage plant diseases. Graphene oxide (GO) is a newly emerging and highly promising antimicrobial agent against various plant pathogens in agricultural science. In this study, the inhibitory activity of GO combined with fungicides (Mancozeb, Cyproconazol and Difenoconazole) against Fusarium graminearum was investigated in vivo and in vitro. The results revealed that the combination of GO and fungicides has significant synergistic inhibitory effects on the mycelial growth, mycelial biomass and spore germination of F. graminearum relative to single fungicides. The magnitude of synergy was found to depend on the ratio of GO and fungicide in the composite. In field tests, GO–fungicides could significantly reduce the disease incidence and disease severity, exhibiting a significantly improved control efficacy on F. graminearum. The strong synergistic activity of GO with existing fungicides demonstrates the great application potential of GO in pest management.

scholarly journals PHYTONCIDES IN THE COMPOSITION OF COMMON BIRD CHERRY

2021 ◽  
Vol 447 (3) ◽  
pp. 70-75
Author(s):  
P.N. Naguman ◽  
A.A. Zhorabek ◽  
A.S. Amanzholova ◽  
I.V. Kulakov ◽  
A.N. Rakhimbaeva
Keyword(s):  
Plant Protection ◽  
Folk Medicine ◽  
Antimicrobial Properties ◽  
Biologically Active ◽  
Natural Immunity ◽  
Prussic Acid ◽  
Destructive Effect ◽  
Inflammatory Processes ◽  
The Common ◽  
Anti Inflammatory

Everyone knows that forest air is very good for health, and one of the most important reasons for this is the presence of phytoncides in it, which kill or suppress pathogens and have a healing effect. Also, phytoncides are one of the factors of the natural immunity of plants (plants sterilize themselves with the products of their vital activity). Their large number is allocated by plants. One of them is the common bird cherry. Cherry-a representative of the genus of plums of the Rosaceae family. The view includes low trees and shrubs. Cheremukha-forest orderly. Its flowers and leaves are rich in phytoncides, thanks to which they exude an alluring aroma. However, when they break down, they release prussic acid, which is dangerous for all living things. This gave them the opportunity to attract and destroy pests. Phytoncides are volatile biologically active substances formed by plants that kill or inhibit the growth and development of bacteria, microscopic fungi, and protozoa. In addition to all of the above, bird cherry has exceptional properties. The strong, somewhat intoxicating scent of flowers and leaves cleanses the air of germs. Antimicrobial properties of phytoncides have led to a large number of studies on their use in medicine, veterinary medicine, plant protection, storage of fruit and vegetable products, in the food industry and other areas of practice. Almost all parts of the plant have bactericidal, fungicidal and insecticidal properties. In folk medicine, bird cherry has long been used as an astringent, fixing, anti-inflammatory and anti-scurvy agent. Bird cherry produces the most powerful phytoncides containing prussic acid. Protozoa die under the influence of bird cherry phytoncides in 5 minutes. On the basis of numerous studies, the time of death of protozoa after noncontact exposure to phytoncidal plants has been established. Especially a lot of phytoncides are released by young leaves in spring and summer, in autumn phytoncides are released much less. The presence of tannins and essential oil in the fruit has an anti-inflammatory effect, which is used to treat inflammatory processes in the gastrointestinal tract and dysentery. The infusion of cherry fruits has a destructive effect on microorganisms. Preparations of the fruits of the common cherry have an antiseptic effect. They are used in dental practice in the treatment of inflammatory processes of the oral mucosa, paradontosis, toothache and hypovitaminosis.

Physiological responses of grapevines to biodynamic management

2015 ◽  
Vol 31 (5) ◽  
pp. 402-413 ◽  
Author(s):  
Renato Vasconcelos Botelho ◽  
Roberta Roberti ◽  
Paola Tessarin ◽  
José María Garcia-Mina ◽  
Adamo Domenico Rombolà
Keyword(s):  
Plant Protection ◽  
Disease Incidence ◽  
Physiological Responses ◽  
Chemical Properties ◽  
Mineral Elements ◽  
Organic Production ◽  
Defense Compounds ◽  
Natural Defense ◽  
Physico Chemical ◽  
Biodynamic Preparations

AbstractA 3-year (2011–2013) field trial was carried out in a mature vineyard (Vitis vinifera L., cv. Sangiovese), planted in 2003, to assess physiological responses of grapevines to biodynamic management. Starting in 2007, the vineyard was managed with organic production protocols in accordance with EC Regulations (834/2007). In 2008, the vineyard (2 ha) was divided in two large plots, with each plot having similar soil physico-chemical properties. One of the plots was managed with organic protocols per EC Regulations and the other with biodynamic practices, consisting of spray application of preparations 500, 500 K, fladen and 501. During the 2011–2013 season, the biodynamic preparations were used at least twice per year, with the exception of 501 that was applied only once in 2013. Concentration of hormones and mineral elements in biodynamic preparations were determined. Biodynamically managed vines showed lower stomatal conductance in all years and lower leaf water potential in 2012. Leaf photosynthetic activity was not influenced by cultivation method. Biodynamic management led to an increase in leaf enzymatic activities of endochitinase (EC 3.2.1.14), exochitinase (β-N-acetylhexosaminidase, EC 3.2.1.52 and chitin 1,4-β-chitobiosidase) and β-1,3-glucanase (EC 3.2.1.39), which are typically correlated with plant biotic and abiotic stresses and associated with induced plant resistance. Year effects were observed with 1,3-β-glucanase, whose activity in 2012 was 4.1-fold higher than in 2013. Disease incidence and grape yields were not different between organic and biodynamic treatments. This study provided a strong indication of a stimulation of natural defense compounds in grapes grown under biodynamic cultivation, but subsequent effects on plant protection and productivity require further evaluation.

Sign in / Sign up

Export Citation Format

Share Document