Protecting Avocado Seedlings from Grafting Failure During Propagation in Nursery Using Biological and Chemical Control

Monir, Gehan A.; Radwan, M. A.; Hassan, Mabrouk S.S.

doi:10.21608/ejp.2021.84933.1040

Cited by 4 publications

(7 citation statements)

References 11 publications

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“…All the tested treatments as anti-failure agents increased peroxidase activity of the tested orange variety, also Tallon and Olaya (2012) mentioned that the transfer of in vitro shoots to rooting media, containing different concentrations of indole butyric acid (IBA) and indole acetic acid (IAA), resulted in regeneration of complete plantlets of trees of a lemon, Sour orange, and 'Cleopatra' mandarin citrus rootstocks. These results are similar to those reported by Sharma(2002) and Monir et al (2021) they stated that the changes in activities of defense related enzymes as a result of treating avocado scions with some fungicides or biofungicides, all tested treatments such as fungicides or biocides increased peroxidase and polyphenoloxidase activities in comparison with control treatment in the two tested cultivars.…”

Section: Discussionsupporting

confidence: 91%

Impact of Safe Alternative Treatments to Management Graft Failure on Citrus Seedling Caused by Some Phytopathogenic Fungi

Mustafa

2023

Scientific Journal of Horticultural Research

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Commercial citrus trees are composed of a scion grafted onto a rootstock. Because grafting is one of the most expensive methods of plant propagation, grafting efficiency is of large practical importance. Recently, Valencia orange trees on root-stocked Volkamer lemon, showed failure grafting. So, they were re-grafted again on a farm located in Um Ammar region of Ismailia governorate. Isolation trials resulted in Alternaria alternate, Fusarium solani and F. equiseti with frequencies i.e. 66.25% 31.37% and 2.11%, respectively from necrotic tissues. Also, the isolation trials were done from all the tested rootstock and scion in the nursery of Horticulture Research Institute (HRI) and the highest frequencies showed with A. alternata on Volkamer lemon (48%) while the lowest frequencies showed with Trifoliate orange (2%). As for Lasiodplodia theobromae, it was isolated only from Volkamer lemon. Also, the isolated fungi were identified using the traditional methods besides molecular bioassay. Pathogenicity experiment was conducted in greenhouse; for the two more frequencies fungi i.e. A. alternate and F. solani, the highest disease incidence percentage was 100% by A. alternate on Navel orange; Valencia scion with Sour orange and Volkamare lemon rootstock. Also, pathogenicity test of the plant samples of HRI nursery was done and the results showed that A. alternata recorded the highest disease incidence (100%) on Navel orange as scion with Sour orange as rootstock. On the opposite it recorded the least disease incidence on Valencia scion with Sour orange rootstock. In an in vitro experiment, the activity of five treatments (H2O2, indole acetic acid (IAA), xanthan gum, wood vinegar and control without treatment) was examined against the growth of the pathogenic fungi. IAA (1000 ppm) showed 100% inhibition of both tested fungi mycelial growth. Also in vitro fungicides' activity was estimated on growth inhibition against the two citrus pathogenic fungi mentioned before. Kemazed and Kinol (200 ppm) gave complete inhibition (100%), to F. solani. Also, Kemazed, Kinol, H2O2, IAA, and wood vinegar were accomplished in the nursery to assess their efficacy on failure grafting on either scion and rootstock. The wood vinegar and IAA as alternative fungicides gave superior activity against the fungi on the failure grafting percentage compared with the control treatments, whereas they recorded 77.77% reduction in case of A. alternate. Treatments of H2O2 gave the highest increase in enzyme activities, while wood vinegar increased the peroxidase, and polyphenol oxidase activities only.

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Section: Discussionsupporting

confidence: 91%

Impact of Safe Alternative Treatments to Management Graft Failure on Citrus Seedling Caused by Some Phytopathogenic Fungi

Mustafa

2023

Scientific Journal of Horticultural Research

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“…The highest values of production of peroxidase and polyphenoloxidase activities in the two tested avocado cultivars Hass and Fuerte were observed after dipping the scions in Amistar Top and Bellis, followed by Kocide (2000) and Serenade ASO (B. subtilis QST713). While the lowest values of peroxidase and polyphenoloxidase activities were recorded after dipping the scions in Star copper and Bio Zeid (Trichoderma album) (Monir et al, 2021).…”

Section: Discussionmentioning

confidence: 94%

“…To determine the effect of the tested commercial products with the concentrations showed in Table (1) on the defense enzyme activities and total phenolic content in three date palm seedlings Barhey, Majdol and Zaghloul cvs. two years old, samples of leaves were taken 24 hours after soil drench of the tested compounds to determine total phenolic content (TPC) and polyphenoloxidase (PPO) activity (Monir et al, 2021).…”

Section: Effect Of the Tested Commercial Products On Total Phenolic C...mentioning

confidence: 99%

Efficacy of Different Commercial Products on Controlling Date Palm Root Rot Under Greenhouse Conditions.

Shehata

Hassan

2023

Menoufia Journal of Plant Protection

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Disease incidence and disease severity of date palm root rot were evaluated on cvs.Barhey, Majdol and Zaghloul during 2021 and 2022 growing seasons in different locations. The highest percentages of disease incidence and disease severity were recorded in nursery located at Beheira governorate, where the lowest were recorded from new orchards in Giza and Qaloubiya governorates during 2021. Isolation trials of the naturally infected date palm root rot yielded four fungal species identified as Fusarium solani, F. moniliforme, F. semitectum and Lasiodiplodia theobromae. Pathogenicity test showed that all isolated fungi were able to induce root rot on date palm seedlings. The highest average disease severity was obtained from the infection with F. solani, followed by F. moniliforme. While, little symptoms showed on the roots inoculated by F. semitectum. Zaghloul cultivar was more susceptible than Barhey and Majdol under artificial inoculation carried out during the two years of the investigation. Efficacy of Biocontrol T34 12% WP (Trichoderma asperellum strain T34), Serenade ASO 1.34% SC, Uniform 39 % SE, Hexaten and Tshgarin 30%SL was evaluated in vitro and under greenhouse conditions for controlling root rot of date palm seedlings. Complete reduction in colony growth of the most frequent fungi was observed due to using Uniform 39 % SE, followed by Hexaten and Tshgarin 30%SL. T34 and Serenade ASO 1.34% SC recorded the lowest efficacy. However, under greenhouse conditions Uniform, Tshgarin and Hexaten gave the highest efficacy for controlling date palm root rot on the two cultivars, Barhey and Zaghloul during the two seasons, while the lowest efficacy was recorded after treatment with T34 and Serenade ASO, respectively. The highest values of total phenol in the three tested date palm cultivars were observed in Barhey cv., while the lowest production were recorded in cv. Zaghloul. The highest values of total phenols was observed after using Uniform and Tshgarin, while the lowest levels of total phenols were recorded by using Serenade ASO. The highest values of polyphenoloxidase activity (PPO) were recorded in cv. Barhey. While the lowest were recorded in cv. Zaghloul. The highest values of PPO were observed after treatment with Tshgarin, while the lowest levels were obtained by using Serenade ASO.

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“…In addition, peroxidase and polyphenol oxidase activities upregulated in two cultivars of avocado; Hass and Fuerte after dipping the scions in Amistar Top and or Bellis. However, after dipping the scions in Star copper or Bio Zeid, the lowest values were noted (Monir et al, 2021). Other studies were performed on some cultivars of date palm trees treated with fungicides; Uniform and/or Tshgarin documented that the highest values of total phenol in Barhey cv.…”

Section: Discussionmentioning

confidence: 98%

“…Each sample was comprised from three replicates of at least six distinct mango trees and immediately put in liquid nitrogen to measure the total phenolic content, chitinase (CHT), peroxidase (PO), and polyphenol oxidase (PPO) activities. (Monir et al, 2021;Shehata and Hassan 2023).…”

Section: Impact Of the Evaluated Products On Defense Related Enzymes ...mentioning

confidence: 99%

Impact of some agrochemical products on early fruit drop of certain Egyptian mango cultivars induced by fungal infection

Shehata,

Hassan,

Banora

2024

Egyptian Journal of Phytopathology

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Protecting Avocado Seedlings from Grafting Failure During Propagation in Nursery Using Biological and Chemical Control

Cited by 4 publications

References 11 publications

Impact of Safe Alternative Treatments to Management Graft Failure on Citrus Seedling Caused by Some Phytopathogenic Fungi

Impact of Safe Alternative Treatments to Management Graft Failure on Citrus Seedling Caused by Some Phytopathogenic Fungi

Efficacy of Different Commercial Products on Controlling Date Palm Root Rot Under Greenhouse Conditions.

Impact of some agrochemical products on early fruit drop of certain Egyptian mango cultivars induced by fungal infection

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