Field and Laboratory Studies to Evaluate Five Soybean Varieties for Their Relative Susceptibility to the Two Spotted Spider Mite Tetranchus Urticae Koch Infestation (A Carina : Tetranychidae :Actenididea)

El-Sanady, Mariam A.; Soliman, Soliman M.; Younis, Alham A.

doi:10.21608/ejar.2008.202946

Cited by 2 publications

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“…As compared to "Sugar Lace", the "Snow Wind" consistently had the highest content of carbohydrates and soluble sugar, as well as the highest density of T. urticae. This was in conformance with previous studies on other crops, which found that the soybean cultivars most susceptible to T. urticae infestation had the highest levels of total carbohydrate when compared to the tolerant cultivars (El-Sanady et al 2008). Similarly, Ali et al (2015) demonstrated that the increased presence of carbohydrates in tomato leaves positively correlated with mite infestation severity.…”

Section: Physiological Changes In Sugar Pea Leaf Contents Affecting T...supporting

confidence: 91%

Sugar pea leaf contents and their influence on population fluctuations of Tetranychus urticae under field conditions at Ismailia governorate

Ismail

2023

Acarines: Journal of the Egyptian Society of Acarology

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A field trial on three sugar pea (Pisum sativum (L.), Fabaceae) cultivars was conducted during the winter season of 2022-23. These cultivars were from two distinct varieties: macrocarpon (cv., Snow Wind and Sugar Lace) and saccharatum (cv., Super Sugar Snap). The aim of the study was to investigate the influence of sugar pea leaf contents and weather conditions on the population fluctuations of Tetranychus urticae Koch (Prostigmata: Tetranychidae). The results showed that T. urticae counts were found to be related to total carbohydrate, soluble sugar, flavonoid, phenol, chlorophyll, and carotenoid contents in the three cultivars throughout the season. The study"s findings revealed that mite densities, including adult, nymph, and egg counts, varied between cultivars, indicating different degrees of infestation. Surprisingly, no predators were observed on any of the three cultivars. The "Sugar Lace" had the highest phenol content and the lowest mite densities. Furthermore, it consistently showed higher levels of flavonoids than the other cultivars. Conversely, "Snow Wind" and "Super Sugar Snap" have higher carbohydrate, soluble sugar, chlorophyll, and carotenoid levels, as well as higher mite population. The variation in infestation among cultivars was, therefore, attributed to changes in leaf phytochemistry. According to the study"s results, including pest-resistant cultivars into Integrated Pest Management (IPM) programs could be beneficial in mite pest control. Selecting cultivars with good phytochemical profiles is a long-term solution for reducing the need for chemical control.

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Section: Physiological Changes In Sugar Pea Leaf Contents Affecting T...supporting

confidence: 91%

Sugar pea leaf contents and their influence on population fluctuations of Tetranychus urticae under field conditions at Ismailia governorate

Ismail

2023

Acarines: Journal of the Egyptian Society of Acarology

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“…It also coincides with Parry (1969) who illustrated the presence of oil glands on both the upper and lower epidermis of the leaves. The greater thickness of the cuticle epidermis especially that of the lower surface could be considered as a physical tolerance factor against spider mites (El-Sanady et al 2008). Shakoor et al (2010) reported that leaf thickness is a very important factor affecting the reproduction and development of mite populations.…”

Section: Histological Studiesmentioning

confidence: 99%

Journal of Plant Protection Research

Allam¹,

Soudy²,

Hassan³

et al. 2018

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Tetranychus urticae (Acari: Tetranychidae) infesting many plants but Mentha viridis L., and Mentha piperita L., were low in number of infestation. Therefore the objective of this study was to identify the resistance of M. viridis and M. piperita plants against T. urticae by studying the external shape and internal contents of those plants. For morphological studies, dried leaves were covered with gold utilizing an Edwards Scan coat six sputter-coater. For histological studies, arrangements of Soft Tissue technique were used. For phytochemical studies, the plants were cut, dried and then high performance liquid chromatography (HPLC) was used. While feeding the mites were collected from the area between oily glands, trichomes and respiratory stomata in both mint species. The most important leaf structures in aromatic plants are the oily glands found on the external part of the leaves (both upper and lower epidermis). The number of oil glands in M. viridis leaves was greater than in M. piperita; the trichomes on the epidermis of M. viridis were greater in number than in M. piperita; the spongy mesophyll in M. viridis was much thicker than in M. piperita. The essential oils in the leaves of both mint species contained 71 compounds representing 99.61% of the total oil constituents identified from M. viridis before infestation, and 90.95% after infestation, and about 99.65% from M. piperita before infestation, and 99.98% after infestation.

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Field and Laboratory Studies to Evaluate Five Soybean Varieties for Their Relative Susceptibility to the Two Spotted Spider Mite Tetranchus Urticae Koch Infestation (A Carina : Tetranychidae :Actenididea)

Cited by 2 publications

References 0 publications

Sugar pea leaf contents and their influence on population fluctuations of Tetranychus urticae under field conditions at Ismailia governorate

Sugar pea leaf contents and their influence on population fluctuations of Tetranychus urticae under field conditions at Ismailia governorate

Journal of Plant Protection Research

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