What Is Blight?
Blight is a disease caused by fungi. It’s not just some random fungus or mold that grows on your food. Blight is a fungal infection of the leaves, stems, fruits and other parts of the plant. There are many different types of blight including white spot (Phytophthora infestans), blackspot (Botrytis cinerea) and red blotch (Rhizoctonia solani).
Symptoms Of Blight:
The symptoms of blight vary from one type of blight to another. White spot (Phytophthora infestans) usually causes yellowing leaves and small brown spots on the leaf surface. Blackspot (Botrytis cinerea) usually causes dark brown spots on the leaf surface. Red blotch (Rhizoctonia solani) usually causes reddish brown spots on the leaf surface.
How To Prevent Blight From Affecting Your Tomatoes:
There are several ways to prevent blights from affecting your tomatoes. First thing you need to do is wash all the dirt off your hands before handling any tomatoes. You can use a garden hose or spray bottle filled with water. If you have a pressure washer, turn it up high and let the steam kill any spores of bacteria that may be growing on the tomato skin. You also should make sure you’re not working in a location that has been contaminated with other types of plants.
For example, you wouldn’t want to work on your tomatoes if you just had some petunias in the garden.
You can prevent any plant diseases from attacking your tomato plants by using clean garden tools. This way you can be sure that there are no lingering remnants of other soil-borne diseases on your tools. When you’re done working in the garden, make sure to clean your tools before you work on your next crop or grow.
You can also try planting a mixture of tomatoes and herbs in your garden. This way you always have something else to harvest if one of your crops becomes diseased. Tomatoes plants are very susceptible to several types of diseases because of their vines which can spread fungal spores to the rest of the garden.
How To Recognize Common Blights:
Unlike many other plant diseases, blights are fairly easy to recognize due to their telltale signs. The most common types of blights include the following:
This type of blight is caused by the fungus-like organism called Phytophthora infestans. It produces dry, dark lesions on the stem and leaves of the plant. Reddish or brown pustules then develop on the top of these lesions. These pustules may be submerged or not submerged into the leaf itself.
The most common sign of late blight is the appearance of a flock of small insects feeding on the underside of the leaves. You’ll also notice small, dark, oval spots on the stems. If you cut open the spots, you may find dark, oval, barely visible bodies inside of them.
If you notice some of these signs on your plants, be sure to promptly remove and destroy all infected plants and any crops they may be growing. You should also make sure to dispose of all plant debris properly in order to avoid spreading the infection to other plants. You can also use a non-organic fungicide to combat this fungus if need be.
The early blight, also known as the water mold, is caused by the oomycete, which is a fungus-like organism. These plants usually attack the tomato plant itself and the disease is more prominent during wetter seasons. The early blight fungus causes infected leaves to turn yellow and then to brown. The leaves may also appear to be dripping wet and slimy. You may also notice some stunting on your plants if you have planted them in infected soil.
Sources & references used in this article:
Tomato plant culture: in the field, greenhouse, and home garden by JB Jones Jr – 2007 – books.google.com
Tomato plant disease classification in digital images using classification tree by H Sabrol, K Satish – 2016 International Conference on …, 2016 – ieeexplore.ieee.org
The natural occurrence of two distinct begomoviruses associated with DNAβ and a recombinant DNA in a tomato plant from Indonesia by T Kon, SH Hidayat, S Hase, H Takahashi… – …, 2006 – Am Phytopath Society
High-performance deep neural network-based tomato plant diseases and pests diagnosis system with refinement filter bank by AF Fuentes, S Yoon, J Lee, DS Park – Frontiers in plant science, 2018 – frontiersin.org
Introduction of tomato yellow leaf curl virus in Florida and implications for the spread of this and other geminiviruses of tomato by JE Polston, RJ McGovern, LG Brown – Plant Disease, 1999 – Am Phytopath Society
Cotton leaf curl Multan virus newly reported to be associated with cotton leaf curl disease in China by JH Cai, K Xie, L Lin, BX Qin, BS Chen… – Plant …, 2010 – Wiley Online Library
Automated image capturing system for deep learning-based tomato plant leaf disease detection and recognition by RG de Luna, EP Dadios… – TENCON 2018-2018 IEEE …, 2018 – ieeexplore.ieee.org
Magnesium oxide nanoparticles induce systemic resistance in tomato against bacterial wilt disease by K Imada, S Sakai, H Kajihara, S Tanaka, S Ito – Plant Pathology, 2016 – Wiley Online Library