scholarly journals Sensitivity of Botrytis cinerea to fenpyrazamine in Japan and its disease control efficacy against the low-sensitive isolate

2020 ◽  
Vol 45 (4) ◽  
pp. 241-244
Author(s):  
Dai Hirotomi ◽  
Soichi Tanaka ◽  
Fukumatsu Iwahashi ◽  
Norio Kimura
Keyword(s):  
Disease Control ◽  
Botrytis Cinerea ◽  
Control Efficacy ◽  
Sensitive Isolate

scholarly journals Botrytis cinerea control on Sauvignon blanc using a recycling sprayer

2012 ◽  
Vol 65 ◽  
pp. 249-255
Author(s):  
V. Raw ◽  
D.C. Mundy ◽  
A.R.G McLachlan ◽  
C. Clifford ◽  
M. Walter
Keyword(s):  
New Zealand ◽  
Disease Control ◽  
Botrytis Cinerea ◽  
Wine Industry ◽  
Target Area ◽  
Economic Threshold ◽  
Control Efficacy ◽  
Sauvignon Blanc ◽  
Bunch Rot ◽  
Excellent Coverage

The New Zealand wine industry is strongly committed to sustainable production The SprayPro Rseries sprayer is designed to recycle unused chemical sprays not deposited on the target area Sauvignon blanc vines in Marlborough New Zealand were studied during 2011/2012 The vineyard area was 5 ha at 80 flowering where the full canopy was sprayed and 10 ha at pre bunch closure (PBC) targeting the fruiting zone only Disease control efficacy of spray recycling was investigated using Botrytis cinerea as the model pathogen Pathogen colonisation of necrotic leaf discs placed in the canopy at 80 flowering and PBC showed even control of B cinerea At PBC 80 of the watersensitive papers had adequate to excellent coverage Botrytis bunch rot incidence and severity were evenly expressed throughout the block but increased during preharvest; severity was well below the 3 economic threshold Recycling of botryticides did not affect disease control

scholarly journals Plant Disease Control Efficacy of Platycladus orientalis and Its Antifungal Compounds

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1496
Author(s):  
Sohyun Bae ◽  
Jae Woo Han ◽  
Quang Le Dang ◽  
Hun Kim ◽  
Gyung Ja Choi
Keyword(s):  
Disease Control ◽  
Rice Blast ◽  
Plant Disease ◽  
Methanol Extract ◽  
Crop Protection ◽  
Ethyl Acetate Fraction ◽  
Antifungal Compounds ◽  
Control Efficacy ◽  
Platycladus Orientalis ◽  
Plant Disease Control

Plants contain a number of bioactive compounds that exhibit antimicrobial activity, which can be recognized as an important source of agrochemicals for plant disease control. In searching for natural alternatives to synthetic fungicides, we found that a methanol extract of the plant species Platycladus orientalis suppressed the disease development of rice blast caused by Magnaporthe oryzae. Through a series of chromatography procedures in combination with activity-guided fractionation, we isolated and identified a total of eleven compounds including four labdane-type diterpenes (1–4), six isopimarane-type diterpenes (5–10), and one sesquiterpene (11). Of the identified compounds, the MIC values of compounds 1, 2, 5 & 6 mixture, 9, and 11 ranged from 100 to 200 μg/mL against M. oryzae, whereas the other compounds were over 200 μg/mL. When rice plants were treated with the antifungal compounds, compounds 1, 2, and 9 effectively suppressed the development of rice blast at all concentrations tested by over 75% compared to the non-treatment control. In addition, a mixture of compounds 5 & 6 that constituted 66% of the P. orientalis ethyl acetate fraction also exhibited a moderate disease control efficacy. Together, our data suggest that the methanol extract of P. orientalis including terpenoid compounds has potential as a crop protection agent.

Evaluation of pyrimethanil (Scala) for the control of Botrytis cinerea on harvested Geraldton waxflower

1999 ◽  
Vol 39 (5) ◽  
pp. 639 ◽  
Author(s):  
M. N. Taylor ◽  
A. H. Wearing ◽  
D. C. Joyce ◽  
D. H. Simons
Keyword(s):  
Disease Control ◽  
Botrytis Cinerea ◽  
Disease Severity ◽  
Real Potential ◽  
Postharvest Treatment ◽  
Leaf Drop ◽  
New Treatments ◽  
Water Treated Control

Pyrimethanil (Scala) is a fungicide that might be used for control of Botrytis cinerea infecting Geraldton waxflower. New treatments are sought to reduce the risk of developing strains of B. cinerea that are resistant to fungicides commonly used against it, such as benomyl (Benlate) or iprodione (Rovral). Scala was applied to waxflower as a postharvest dip at 1.5 or 2 mL product/L. Disease severity on and flower and leaf drop from waxflower bunches pre-inoculated with B. cinerea were significantly (P = 0.05) reduced by treatment with Scala. Further, flower and foliage vase lives were significantly (P = 0.05) longer as a result of postharvest treatment with Scala as compared with water-treated (control) stems. Similar degrees of disease control where achieved with either Scala or Rovral. The results demonstrate that Scala has real potential as an alternative fungicide for control of B. cinerea on waxflower.

scholarly journals Effects of SHAM on the Sensitivity of Sclerotinia sclerotiorum and Botrytis cinerea to QoI Fungicides

Plant Disease ◽  
2019 ◽  
Vol 103 (8) ◽  
pp. 1884-1888 ◽  
Author(s):  
Hongjie Liang ◽  
Jinli Li ◽  
Chaoxi Luo ◽  
Jianhong Li ◽  
Fu-Xing Zhu
Keyword(s):  
Botrytis Cinerea ◽  
Sclerotinia Sclerotiorum ◽  
Mycelial Growth ◽  
Control Efficacy ◽  
Vitro Assay ◽  
Qoi Fungicides ◽  
Quinone Outside Inhibitor ◽  
Fungal Phytopathogens ◽  
The Ideal

It is a common practice to add salicylhydroxamic acid (SHAM) into artificial medium in the in vitro sensitivity assay of fungal phytopathogens to the quinone outside inhibitor (QoI) fungicides. The rationale for adding SHAM is to inhibit fungal alternative oxidase, which is presumed to be inhibited by secondary metabolites of plants. Therefore, the ideal characteristics of SHAM should be almost nontoxic to phytopathogens and have no significant effect on control efficacy of fungicides. However, this study showed that the average effective concentration for 50% inhibition (EC50) of mycelial growth values of SHAM were 97.5 and 401.4 μg/ml for Sclerotinia sclerotiorum and Botrytis cinerea, respectively. EC50 values of the three QoI fungicides azoxystrobin, kresoxim-methyl, and trifloxystrobin in the presence of SHAM at 20 and 80 μg/ml for S. sclerotiorum and B. cinerea, respectively, declined by 52.7 to 78.1% compared with those without SHAM. For the dicarboximide fungicide dimethachlone, the average EC50 values in the presence of SHAM declined by 18.2% (P = 0.008) for S. sclerotiorum and 35.9% (P = 0.012) for B. cinerea. Pot experiments showed that SHAM increased control efficacy of the three QoI fungicides against the two pathogens by 43 to 83%. For dimethachlone, SHAM increased control efficacy by 134% for S. sclerotiorum and 86% for B. cinerea. Biochemical studies showed that SHAM significantly inhibited peroxidase activity (P = 0.024) of B. cinerea and esterase activity (P = 0.015) of S. sclerotiorum. The strong inhibitions of SHAM per se on mycelial growth of B. cinerea and S. sclerotiorum and significant influences on the sensitivity of the two pathogens to both the QoI fungicides and dimethachlone as well as inhibitions on peroxidase and esterase indicate that SHAM should not be added in the in vitro assay of sensitivity to the QoI fungicides.

scholarly journals COMPARAÇÃO DE DOIS MÉTODOS DE APLICAÇÃO DE FUNGICIDAS, IRRIGAÇÃO POR GOTEJAMENTO E PULVERIZAÇÃO CONVENCIONAL NO CONTROLE DO MOFO CINZENTO (Botrytis cinerea Pers.: Fr.) EM VASOS COM PLANTAS DE LISIANTHUS (Eustoma grandiflorum (Raf.) Shinn.)

Irriga ◽  
2006 ◽  
Vol 11 (3) ◽  
pp. 328-338
Author(s):  
Ieoschua Katz ◽  
Antonio Ribeiro da Cunha ◽  
Antonio De Pádua Sousa ◽  
Egberto Egon de Herdani
Keyword(s):  
Disease Control ◽  
Botrytis Cinerea ◽  
Drip Irrigation ◽  
Eustoma Grandiflorum ◽  
Stage Number ◽  
Thiophanate Methyl ◽  
Fungicide Application ◽  
Potted Plants ◽  
Application Methods ◽  
Lower Production

COMPARAÇÃO DE DOIS MÉTODOS DE APLICAÇÃO DE FUNGICIDAS,IRRIGAÇÃO POR GOTEJAMENTO  E PULVERIZAÇÃO CONVENCIONAL    NO CONTROLE DO MOFO CINZENTO (Botrytis cinerea Pers.: Fr.) EM VASOS COM PLANTAS DE LISIANTHUS (Eustoma grandiflorum (Raf.) Shinn.)  Ieoschua Katz1; Antonio Ribeiro da Cunha2; Antônio de Pádua Sousa1; Egberto Egon de Herdani11Departamento de Engenharia Rural, Faculdade de Ciëncias Agronömicas, Universidade Estadual Paulista, Botucatu, SP, [email protected] Departamento de Recursos Naturais, , Faculdade de Ciëncias Agronömicas, Universidade Estadual Paulista, Botucatu, SP  1 RESUMO Novas técnicas de combate às doenças têm sido usadas, como os defensivos hidrossolúveis via água de irrigação, a quimigação, um procedimento recente que reduz a mão de obra, com uniformidade na aplicação, menor contato do operador com produtos tóxicos, e menores impacto ambiental e custo de produção. Visando o controle do mofo cinzento (Botrytis cinerea) na cultura do Lisianthus, este trabalho teve o intuito de avaliar dois métodos de aplicação de fungicidas, a aplicação via gotejamento (fungigação) e a pulverização, com diferentes tratamentos. Os fungicidas utilizados foram: thiofanato metílico (50 g i.a. L-1), thiofanato metílico + chlorothalonil (50 g i.a. L-1 + 35 g i.a. L-1) e iprodione (50 g i.a. L-1). Avaliou-se o número de lesões, o número de botões florais e a altura das plantas de Lisianthus. Foi possível concluir que, tanto na fase de crescimento (número de lesões na planta) como na fase final (número de botões florais) da cultura de Lisianthus, os tratamentos 2 (thiofanato metílico + chlorotalonil) e 3 (iprodione) foram os mais eficientes. Considerando que o tratamento 2 é uma mistura de dois fungicidas, o primeiro sistêmico e o segundo de contato, independente das vias de aplicação, a mistura aumentou a eficiência em relação ao tratamento 1 (thiofanato metílico). Com isso, a aplicação por gotejamento (fungigação), revelou eficiência equivalente à técnica de pulverização. UNITERMOS: Lisianthus, quimigação, irrigação por gotejamento, controle de doenças .  KATZ , I.; CUNHA, A. R. da; SOUSA, A. de P.; HERDANI, E.E.de. COMPARISON OF TWO METHODS OF FUNGICIDE APPLICATION, DRIP IRRIGATION AND CONVENTIONAL SPRAYING CONTROL FOR CINEREOUS MILDEW (Cinerea botrytis Pers.:Fr.) IN POTTED PLANTS OF LISIANTHUS (Eustoma grandiflorum (Raf.) Shinn.)  2 ABSTRACTPlant disease control techniques are used through the irrigation water, which reduces the labor and it improves application uniformity with smaller contact of the operator with toxic products, lower environmental impact and lower production cost. In order to control Botrytis cinerea the Lisianthus culture, this work aimed to evaluate two fungicide application methods with different treatments. The fungicides were: thiophanate methyl (50 gi.a. L-1), thiophanate methyl + chlorothalonil (50 g i.a. L-1 + 35 g i.a. L-1) and iprodione (50 g i.a. L-1). Number of lesions, number of diseased floral buttons and height of the Lisianthus plants were evaluated. It was possible to deduce, that in the growth stage (number of lesions in the plant) as well as in the final stage (number of floral buttons) of the Lisianthus culture, the most efficient treatments were 2 (thiophanate methyl + chlorothalonil) and 3 (iprodione). Considering that treatment 2 is a mixture of two fungicides, a systemic and a contact one, independently of application methods, the mixture increased efficiency in relation to treatment 1 (thiophanate methyl). Thus, chemigation was as efficient as spreading technique. KEYWORDS: Lisianthus, chemigation, drip irrigation, disease control

scholarly journals Baseline Sensitivity of Botrytis cinerea to the Succinate Dehydrogenase Inhibitor Isopyrazam and Efficacy of this Fungicide

Plant Disease ◽  
2016 ◽  
Vol 100 (7) ◽  
pp. 1314-1320 ◽  
Author(s):  
Yingying Song ◽  
Zhengqun Zhang ◽  
Lele Chen ◽  
Leiming He ◽  
Hongbao Lu ◽  
...  
Keyword(s):  
Succinate Dehydrogenase ◽  
Botrytis Cinerea ◽  
Spore Germination ◽  
Mycelial Growth ◽  
Field Trials ◽  
Baseline Sensitivity ◽  
Control Efficacy ◽  
Frequency Distributions ◽  
Geographical Regions ◽  
Succinate Dehydrogenase Inhibitor

Isopyrazam is a new broad-spectrum, foliar-absorbed and -translocated succinate dehydrogenase inhibitor fungicide. In this study, 159 Botrytis cinerea isolates collected from different geographical regions of Shandong Province of China were characterized for baseline sensitivity to isopyrazam. Furthermore, the protective and curative activity of isopyrazam on strawberry fruit and the control efficacy in the field were also determined. In contrast to its mycelial growth, the spore germination of B. cinerea was inhibited completely by lower concentrations of isopyrazam, about 1 μg ml−1 on yeast-peptone-acetate medium. Frequency distributions of isopyrazam 50% effective concentration (EC50) values were unimodal curves, with mean EC50 values of 0.07 ± 0.04 (standard deviation) and 0.68 ± 0.36 μg ml−1 for the inhibition of spore germination and mycelial growth, respectively. In addition, there was no positive multiple resistance between isopyrazam and other classes of botryticides such as diethofencarb, iprodione, pyrimethanil, or SYP-Z048. In field trials conducted during 2014 and 2015, isopyrazam used at a concentration of active ingredient at 150 and 200 g ha−1 provided a control efficacy ranging from 76.7 to 87.8% on leaves and from 81.5 to 90.7% on fruit. These results suggest that isopyrazam has the potential to play an important role in the management of gray mold.

scholarly journals Product formulation is crucial to the success of lipid-based bio-fungicides

2018 ◽  
Vol 71 ◽  
pp. 272-284 ◽  
Author(s):  
Kirstin Wurms ◽  
Annette Ah Chee
Keyword(s):  
Powdery Mildew ◽  
Disease Control ◽  
Milk Fat ◽  
Emulsion Stability ◽  
Control Efficacy ◽  
Anhydrous Milk Fat ◽  
Polyglycerol Ester ◽  
Product Formulation ◽  
Fat Globules ◽  
Best Disease

Powdery mildew is a major cause of damage to squash plants. Anhydrous milk fat (AMF) or soybean oil (SBO) may be effective at treating this disease but these active ingredients must be mixed with an emulsifier to enable even distribution and suspension of fat globules, and an antioxidant to prevent rancidity. The overall formulation may affect disease control efficacy, leaf health and product stability. The effect of different emulsifiers and antioxidants on emulsion stability, odour and shelf-life of AMF and SBO bio-fungicides was tested in laboratory assays, and on powdery mildew disease control efficacy and leaf health on glasshouse-grown squash plants. Both AMF and SBO formulations including a polyglycerol ester emulsifier (Grindsted® PGE 20 Veg) resulted in the best emulsion stability, disease control and leaf health. None of the antioxidants tested significantly affected on disease control efficacy in AMF formulations, but SBO formulations containing vitamin E as the antioxidant provided the best disease control efficacy and emulsion stability.

Advanced Copper and Copper Alternatives for Crop Protection – a minireview

2021 ◽  
Vol 17 ◽  
Author(s):  
Jorge Pereira ◽  
Alex King ◽  
Maria Gabriela Nogueira Campos ◽  
Swadeshmukul Santra
Keyword(s):  
Disease Control ◽  
Environmental Impacts ◽  
Low Cost ◽  
Crop Protection ◽  
Control Efficacy ◽  
Low Toxicity ◽  
Bodies Of Water

: Copper (Cu) has been used in agriculture for centuries as a standard bactericide/fungicide due to its low cost, superior disease control efficacy, and relatively low toxicity to humans. However, the extensive use of copper as a pesticide has caused the development of Cu-tolerant microorganisms as well as negative environmental impacts due to the accumulation of copper in soil and bodies of water. Therefore, there is a strong demand for advanced Cu products and alternatives to minimize the Cu footprint in the environment. This minireview will cover the limitations of Cu usage and the strategies being investigated to develop advanced Cu materials and alternatives for crop protection using nanotechnology.

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