John O. Oladokun

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• Doctor of Philosophy
• Postdoc. Ext. Associate at Texas A&M University

Lily (Lilium asiatica) is an important plant grown for its range of flower colors and heavy scent. In March 2024, potyvirus-like symptoms consisting of light-yellow mottling and mosaic were noticed on 12/20 lily plants in a private property in Weslaco, Hidalgo County, Texas. Two symptomatic plants (WTX1 and WTX2) were sampled randomly for virus dia...

During summer 2022, a cluster of Madagascar periwinkle plants with white and mauve flowers were observed with foliar mild yellow mosaic symptoms on a private property in Harlingen, Cameron County, Texas. The symptoms were reproduced on mechanically inoculated periwinkle and Nicotiana benthamiana plants. Virions of 776 to 849 nm in length and 11.7 t...

Investigations conducted during the spring 2020 season to diagnose the associated viral agent of a severe mosaic disease of wheat in a Texas Panhandle field revealed the presence of wheat Eqlid mosaic virus (WEqMV; genus Tritimovirus, family Potyviridae) in the analyzed samples. The complete genome sequences of two WEqMV isolates were determined, a...

Crinum sp. (family Amaryllidaceae) is an ornamental flower bulb that is commonly called crinum lily, cape lily, cemetery plant, spider lily, and swamp lily. In April 2023, two plants of Crinum sp. var. Maiden's Blush with yellow stripe symptoms (Fig. S1) were submitted to the Texas Plant Virus Diagnostic Laboratory, Weslaco, TX for virus diagnosis....

Potato leafroll virus (PLRV) and Potato virus Y (PVY) are two important viruses causing serious potato yield losses in the North-east region and other planting areas in India. As a consequence, it is urgent to develop an efficient and quick method for the identification and diagnosis in the field. The results presented here showed that the reverse...

Tomato leaf curl disease (ToLCD) is a severe threat to tomato production. Yield losses are generally high in the absence of effective management strategies. Whitefly vector transmitting ToLCD is challenging to control and resistance is absent in most cultivated tomato gene pools against the tomato leaf curl virus (ToLCV). The use of resistant culti...

Potato affecting viruses is an important biotic factor that hampers both the quality and yield of potato production worldwide. The occurrence of potato viruses has been historically recorded in India. Viruses such as potato virus X (PVX), potato virus Y (PVY), potato virus A (PVA), potato virus M (PVM), potato virus S (PVS), potato leafroll virus (...

Alfalfa mosaic virus (AMV, family Bromoviridae, genus Alfamovirus) has an extensive host range. The reports of AMV available in India were dated far back as 1979 and 1981 found in alfalfa and brinjal crops respectively. In January 2019, field surveys were conducted for viral diseases infecting potato in Sonitpur and Jorhat districts of Assam state...

Tomato is the most economically important fruit‐vegetable crop grown worldwide. However, viral diseases remain an important factor limiting its productivity with estimated quantitative and qualitative yield losses in tomato crop often reaching up to 100 per cent. Many viruses infecting tomato has been reported, while new viral disease have also eme...

The consumption of cassava crop per capita calories in many Africa countries ranked it as the second most important staple food crop. Despite its diverse utilities, the yield potential of cassava is greatly hampered by viral diseases and these differ from country to country, depending on the type of viruses present. Unfortunately, the recent sudden...

The consumption of cassava crop per capita calories in many Africa countries ranked it as the second most important staple food crop. Despite its diverse utilities, the yield potential of cassava is greatly hampered by viral diseases and these differ from country to country, depending on the type of viruses present. Unfortunately, the recent sudden...

Tomato is principally subjected to severe yield losses due to adverse effects of a number of factors particularly biotic factors (pathogens). The lacks of tomato genotypes resistance to diseases have increased both the financial cost and environmental impact of tomato production while reducing the yield and quality. Therefore developing tomato geno...

Farmers’ fields where cucurbit crops were grown in seven Local Government Areas (LGA) of Ogun state were surveyed in 2009 and 2010 for incidence and severity of virus symptoms and the identity of the viruses infecting the crops were determined using DAS-ELISA. Six viruses including Zucchini yellow mosaic virus (ZYMV), Watermelon mosaic virus (WMV),...

Cucurbits are economic crops in Nigeria which serve as additional nutritional supplements and also good sources of income for farmers. Viral diseases are a worldwide problem of cucurbits and a major limiting factor for cucurbit production. A survey of farmer’s fields where cucurbit crops were grown was carried out to assess the incidence and severi...

Cucurbits are economic crops in Nigeria which serve as additional nutritional supplements and also good sources of income for farmers. Viral diseases are a worldwide problem of cucurbits and a major limiting factor for cucurbit production. A survey of farmer’s fields where cucurbit crops were grown was carried out to assess the incidence and severi...