Screening and Cross-Resistance Analysis of Alternative Fungicides Against Carbendazim-Resistant Colletotrichum Gloeosporioides Penz. From Mango (Mangifera Indica L.)

Zhang, L.H.; Li, M.; Gao, Zhiqiang; Zhang, Z.K.; Yang, F.Z.; Xie, Yingxin; Hu, Mengjun; Yu, Yongxiang

doi:10.17660/actahortic.2013.992.52

Cited by 7 publications

(3 citation statements)

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“…of Camellia oleifera (oil-tea) anthracnose in the nursery were sensitive to prochloraz and indicated that the fungicide had not developed resistance to prochloraz at present. After testing 23 fungicides, Zhang et al [ 66 ] found prochloraz to be the most toxic against mycelial growth of eight isolates of C. gloeosporioides in China. These results prove that prochloraz can be used as one of the effective fungicides to control anthracnose of V. odoratissimum , and it is also very valuable to prevent and control other plant diseases caused by Colletotrichum species.…”

Section: Discussionmentioning

confidence: 99%

Colletotrichum siamense, a Novel Causal Agent of Viburnum odoratissimum Leaf Blotch and Its Sensitivity to Fungicides

Li,

Liao,

Wan

et al. 2023

JoF

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Viburnum odoratissimum Ker-Gawl is native to Asia and is usually used as a garden ornamental. In September 2022, a leaf blotch on V. odoratissimum was observed in Nanjing, Jiangsu, China. The disease causes the leaves of the plants to curl and dry up and defoliate early. It not only seriously affects the growth of the plants but also greatly reduces the ornamental value. The pathogenic fungus was isolated from the diseased leaves, and the fungus was identified to be Colletotrichum siamense based on morphological features and multilocus phylogenetic analyses of the internal transcribed spacer (ITS) region, actin (ACT), calmodulin (CAL), beta-tubulin 2 (TUB2), chitin synthase (CHS-1), Apn2-Mat1-2 intergenic spacer and partial mating type (ApMat), and glyceraldehyde-3-phosphate dehydrogenase (GAPDH) genes. Pathogenicity tests were performed by inoculating healthy leaves with conidia. C. siamense can grow at 15–35 °C, with an optimal growth temperature at 25–30 °C. The results of sensitivity to nine fungicides showed that C. siamense was the most sensitive to prochloraz in the concentration range of 0.01 μg/mL to 100 μg/mL. Therefore, spraying prochloraz before the optimum growth temperature of pathogenic fungus can achieve effective control. It provided useful information for future studies on the prevention and treatment strategies of C. siamense. This is the first report of leaf blotch caused by C. siamense on V. odoratissimum in China and worldwide.

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Section: Discussionmentioning

confidence: 99%

Colletotrichum siamense, a Novel Causal Agent of Viburnum odoratissimum Leaf Blotch and Its Sensitivity to Fungicides

Li,

Liao,

Wan

et al. 2023

JoF

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“…This resistance is known in several species of genus Colletotrichum. Xu et al (2014) founded some C. gloeosporoides isolates with lower sensitivity to fungicide active ingredients tebuconazole and prochloraz and Zhang et al (2013) isolates resistant to carbendazim. Some isolates of C. cereale were resistant to thiophanate-methyl (Young et al, 2010) and benzimidazole (Wong et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Sensitivity of Colletotrichum acutatum Isolates to Selected Fungicides

Jílková¹,

Víchová²,

Pokorný³

et al. 2015

Acta Univ. Agric. Silvic. Mendelianae Brun.

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Laboratory tests of six isolates of the pathogen Colletotrichum acutatum from diff erent host plants demonstrated the varying sensitivity of pathogen with regard to mycelium growth and conidial germination a er treatment with seven fungicides containing various active ingredients. None of the evaluated isolates was tolerant to the selected active ingredients in the fungicides. In tests of mycelium growth sensitivity, isolates from lupin and strawberry were most frequently identifi ed as the most sensitive of all evaluated fungicides. The saffl ower isolate, on the other hand, most frequently exhibited the lowest reaction to fungicides. Diff erences in conidial germination of individual isolates were not detected in fungicides with the active ingredients dithianon, folpet and mancozeb, for which inhibition reached 100% in almost all isolates. The most signifi cant diff erences in sensitivity among individual isolates were recorded in fungicides with the active ingredients azoxystrobin and metiram. In the case of the fungicide with active ingredient azoxystrobin, the highest inhibitory eff ect was achieved in the saffl ower isolate and the lowest in the white lupin isolate. A er treatment with the fungicide with active ingredient metiram, the lowest germination rate was recorded in isolates from saffl ower and strawberry and the highest in isolates from hypericum and lupin.

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“…The poor thermal stability of ZJ and FZ (melting at 55–72 °C, 53 °C, respectively) increases the difficulty of preparing a suspension concentrate (SC), since the grinding apparatus will get stuck during grinding as a result of the tackiness of the substance. , Most commercially available formulations of ZJ and FZ are an emulsifiable concentrate (EC) like other low-melting-point agrochemicals . However, petroleum-based solvents in the EC formulation lead to exposure to the environment, causing safety hazards to human and a negative impact on the environment generally. , SC is preferred for the industry, owing to the environmental protection and convenient production, but outstanding physical properties such as thermal stability and flow ability are required. , Besides, ZJ and FZ with a low melting temperature sometimes suffer oiling-out during the crystallization and postprocessing, making production more difficult. − For fungicides, extensive and repetitive applications of a fungicide would cause the high level of resistance. − …”

Section: Introductionmentioning

confidence: 99%

Enhancing Stability and Formulation Capability of Fungicides by Cocrystallization through a Novel Multistep Slurry Conversion Process

Jin

Gong

et al. 2020

Crystal Growth & Design

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Solid agrochemicals with poor thermal stability pose a huge challenge to their production and application. Herein, two low-melting-point fungicides, pyraclostrobin (ZJ) and flusilazole (FZ), were designed to form cocrystals with the high melting point fungicide of thiophanate-methyl (TM), respectively. An infrequent multistep slurry conversion crystallization process was discovered and studied, which accelerated the formation of cocrystals, and the mechanism was revealed. Oiling-out of FZ and ZJ was the key process to multistep slurry conversion crystallization. The heterogeneous system possessed the advantage of high energy, which accelerated the synthesis of cocrystals. Furthermore, the variations of physicochemical properties containing thermal stability, tap density, formulation ability, and storage stability of both the parent fungicides and cocrystals were analyzed and compared. Packing coefficient and crystal structure analysis revealed the structure–property relationships of cocrystals. The single-crystal structure showed the strong N-H···N hydrogen bonds between the FZ and TM, and N-H···O and N-H···S interactions in the ZJ-TM cocrystal. Strong hydrogen bonds stabilize the structures of cocrystals, which enables ZJ-TM and FZ-TM to be made into a greener water suspension concentrate, instead of an emulsifiable concentrate with pollution.

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Screening and Cross-Resistance Analysis of Alternative Fungicides Against Carbendazim-Resistant Colletotrichum Gloeosporioides Penz. From Mango (Mangifera Indica L.)

Cited by 7 publications

References 0 publications

Colletotrichum siamense, a Novel Causal Agent of Viburnum odoratissimum Leaf Blotch and Its Sensitivity to Fungicides

Colletotrichum siamense, a Novel Causal Agent of Viburnum odoratissimum Leaf Blotch and Its Sensitivity to Fungicides

Sensitivity of Colletotrichum acutatum Isolates to Selected Fungicides

Enhancing Stability and Formulation Capability of Fungicides by Cocrystallization through a Novel Multistep Slurry Conversion Process

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