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INTRODUCTION
INTRODUCTION
Plant diseases limit the productivity of the plant. The diagnosis of plant diseases depends mainly on the observation of disease symptoms and the presence of pathogenic agents in or on the diseased tissue. Determining the causative agent of a disease is usually the first step in attempting to overcome the disease. Plant diseases caused by biotic (living) agents such as fungi, bacteria, viruses, nematodes and parasitic plants, but they also study plant disorders caused by abiotic (non-living) agents such as nutrient imbalances, air pollution and other unfavorable growth conditions .
The application used by us to detect plant diseases is PictureThis. Picture This was born from the curiosity of a child. This application is also to help more people learn about plants, trees, insects and the world around them. It also helps in identifying plants as well as learning how to care for them. The app also has a team of over 80 experts to provide plant disease diagnosis and smart care recommendations to users. The app's mission is to be a botanist in everyone's pocket, helping people everywhere build a better relationship with nature. The goal is to make PictureThis an essential app for every plant lover, allowing more people to experience the joy of interacting with nature.
OBJECTIVE
OBJECTIVE
To diagnose plant diseases based on symptoms and signs of pathogen.
To diagnose plant disease by using smart phone applications.
MATERIALS
MATERIALS
Disease plant sample
Dissecting microscope
Compound light microscope
Glass slide
Cover slip
Lactophenol cotton blue
Smart phone
Inculating loop
PROCEDURES
PROCEDURES
Disease symptoms and signs of pathogens were noted and described if visible.
Information was reviewed for plant samples, specimens, plant varieties, age, stage and other relevant information.
Available references had been consulted.
Plant samples were prepared for microscopic observation under a dissecting microscope.
The plant disease app was installed from the App Store which is PictureThis.
The application was used to identify the symptoms of the disease.
Results were recorded from microscopic observation and application identification.
RESULT
RESULT
Tabebuia rose
Tabebuia rose
Brown spot
Brown spot
Dark brown, irregular spots on both upper and lower leaf surfaces.
Lesions typically will have a yellow or chlorotic halo when held up to a back light.
Leaves become yellow to rusty brown.
Tamarin indica
Tamarin indica
Bacteria leaf blight
Bacteria leaf blight
Wilting and yellowing of leaves, or wilting of seedlings
Infected leaves turn grayish green and roll up.
Leaves turn yellow to straw-colored and wilt.
Citrus microcarpa
Citrus microcarpa
Leaf spot
Leaf spot
Fairly defined margins and brown, black, tan, or reddish centers.
Loss of leaves.
Arabica coffee
Arabica coffee
Brown spot
Brown spot
Dark brown, irregular spots on both upper and lower leaf surfaces.
Lesions typically will have a yellow or chlorotic halo when held up to a back light.
Leaves become yellow to rusty brown.
Citrus microcarpa
Citrus microcarpa
Canker
Canker
Small, round blister-like formations on leaves, branches, stems, new shoots and fruit.
Watery apperances.
Arabica coffee
Arabica coffee
Carcopora leaf spot
Carcopora leaf spot
Small, brown flecks develop with a reddish border, expanding to circular spots
4mm wide with an ashy-grey centre.
A ragged hole and fungus appeared.
STEP OF USING PIICTURE THIS
STEP OF USING PIICTURE THIS
Open Picture This application and click on the camera icon in the middle.
2. Tap the middle green circle button and the app will process it.
3. After a few second, it will provide all the information that will be needed.
DISCUSSION
The process of diagnosing plant illnesses based on pathogen symptoms and indicators entails closely observing plant symptoms, such as discolouration, wilting, lesions, or stunted growth, which may point to the presence of bacteria, viruses, nematodes, or fungi. The symptoms that are frequently observed are virus particles, bacterial exudates, or fungal spores. These can demonstrate that a pathogen is present. However, since many plant diseases share symptoms, it is impossible to diagnose them based only on outward signs. Accurate diagnosis and efficient disease control also depend on local environmental factors and plant conditions.
QUESTION
QUESTION
What is the name of a casual pathogen found on the plant samples?
= Alternaria alternata and Xanthomonas axonopodis
What is the name of disease?
= Leaf spot and canker
How to manage the disease?
= To treat leaf spot, prune and remove severely affected leaves and provide regular treatments of neem oil or other fungicide to the foliage. Additionally, temporarily keep the plant away from other plants. To treat canker, cut off all infected areas, prune back to about 10-15cm (4-6in) beyond the affected area and sterilize pruning tools to prevent spreading the disease. Spray with a suitable fungicide three times a year.
CONCLUSION
CONCLUSION
Overall, we are able to diagnose plant diseases based on the symptoms and signs of the pathogen. We also managed to get information by using the PictureThis application in the management of plant diseases. Therefore, using this application can speed up the time in determining the potential pathogen involved and taking appropriate action. Thus, the PictureThis application provides assistance to all users because it can be accessed quickly to diagnose a plant disease. Other users can obtain accurate information and can prevent disease in the tree before it gets worse. Therefore, the use of this application can help its users from various angles such as reducing the number of damaged plants and providing effective measures to users.
REFERENCES
REFERENCES
Angels, L. (2024, September 7). How to Get Rid of Brown Spots on Leaves. The Spruce. https://www.thespruce.com/treating-brown-spots-on-leaves-5076039
Diagnosis of Plant Health Problems. (n.d.). CT.gov - Connecticut’s Official State Website. https://portal.ct.gov/CAES/Fact-Sheets/Plant-Pathology/Diagnosis-of-Plant-Health-Problems
Plant disease - Symptoms and signs. (n.d.). Encyclopedia Britannica. https://www.britannica.com/science/plant-disease/Symptoms-and-signs
Grabowski, M. (2024). Leaf spot diseases of trees and shrubs. Extension.umn.edu. https://extension.umn.edu/plant-diseases/leaf-spot-diseases-trees-and-shrubs
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