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Leaf Blight
Soil Pests and Diseases Nutrients

Posted By: Plant Magic

Common Plant Diseases and How to Fix Them: Leaf Blight

Certain plant pests and diseases like Pythium are very common with hydroponic growth and easily treated with products such as Pyth. Leaf blight affects crops such as tomato, rice, corn carrot, pepper, and beans. Leaf blight can be a bacterial or a fungal disease, with several pathogens capable of causing leaf blight and with plants presenting similar initial symptoms.

Plants affected by leaf blight start with round to oval-shaped leaf spots, with colours being yellow, brown, or black. These spots can be extremely small or present as water-soaked lesions initially but, as the disease develops, leaf spots will begin to show contrasting colours, such as a brown centre with a yellow halo or any other colour variation.


Late Blight

Affecting both potatoes and tomatoes, late blight can affect these plants after prolonged, cool rainfall. Temperatures between 15? and 24? make plants more susceptible, with tomato leaves presenting damp, wilted patches and plants potentially defoliating within a week of infection. Tomato plants surviving late blight produce fruits with leathery patches and don’t ripen appropriately.

Potato tubers or tomato fruits can be affected if dark brown patches occur in stems and spread. Potato plant leaves also present similar symptoms to tomatoes’, however, late blight spreads slower to new plants. When potatoes aren’t dug up early enough, late blight often spreads to tubers and causes decay with a red-brown colour. These potatoes eventually rot and won’t store well.

Essence Leaf is ideal to fight against leaf diseases very quickly, making sure that plant grow stronger and healthier. Protect your plants from airborne pathogenic fungi and combat fungi pathogens already infecting your plants.


Carrot Leaf Blight

Carrot leaf blight attacks around mid to late-summer when there is a period of continued rainfall. Symptoms begin with both the stems and the leaves having dark red-brown spots and the edges of leaves withering. Plants grow weak and with the tendency to break at the stem should you attempt to pull them from the ground.

Additional moisture with temperatures of between 18? and 24? worsens the disease. Crops should be rotated and spaced correctly to allow for proper air flow and for light to reach all plants. Make sure to always pull weeds from around carrot plants and to remove affected leaves before the blight spreads to other plants.

Carrots in Soil

Leaf Blight or Nutrient Deficiency?

It can be easy to confuse leaf blight for a nutrient deficiency at first glance, particularly with both potassium and manganese deficiencies. A potassium deficiency also causes leaf spots that may seem identical to the leaf spots caused by leaf blight. These symptoms are usually present in old leaves, with the leaf edges being more affected.

Severe potassium deficiencies may cause old leaves to become necrotic. Providing plants with an adequate source of potassium to balance the nutrient’s level is essential and easily done by utilising a PK booster.

With a manganese deficiency, there is interveinal necrosis that may be confused with leaf blight. This nutrient deficiency affects young leaves, with the leaf base being more affected than the leaf edges. Alkaline soils are more susceptible to manganese deficiencies, so ensuring that your soil’s pH levels are adjusted will help to prevent this issue. A sulphur supplement, which can be added with the Platinum - Premium PK 9-18, helps to balance alkaline soils.

Make sure to let us know if you have any questions about any of our products - our friendly team is always happy to help, so get in touch today.

Our Blog: Hydroponic Tips & Tricks

Whether you are an expert who already has a thriving crop of healthy plants, or you are trying to grow your very first hydroponic yield, we can help you to grow the strong and healthy crops you have always wanted.

Here at Plant Magic Plus, our team of gardening experts work very hard behind the scenes to provide you with the high quality nutrients, additives and growing media that will help you to get the most out of your growing plants.

But we understand that successful horticulture is about more than just having good quality chemicals, nutrients or fetilisers, that's why we have written this blog to provide you with the insights, tips and techniques you will need to give your garden that extra magic touch.

From helpful advice about watering your plants in soil and a guide to magnesium nutrients, to top tips about growing hydroponic vegetables and a comprehensive overview of microbes, we’ve got everything covered.


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