Tomato leaf curl can be caused by watering problems, deficiency, or diseases caused by a virus.Depending on the pattern of leaf curl and the part of the plant getting affected, top leaves or bottom leaves, leaf curl in a tomato plant can have different causes. Let’s find out why.Tomato plants are commonly grown in gardens by both amateur and professional gardeners. They are a great addition to your kitchen garden and plucking fresh tomatoes from your own garden for daily use is very satisfying and fulfilling. Unfortunately, the tomato plant is sensitive to herbicides and is susceptible to damage from various factors like stress, biology, diseases, and the environment. Tomato leaf curl is a common symptom related to possible damage in tomato plants. The tomato yellow leaf curl virus can cause leaf curl in a particular direction, and if left untreated, the leaves will yellow, wilt, and die. Tomato plant leaf curling is a symptom that can be caused by various factors, most of which do not cause lasting damage and can be treated easily. Tomato leaves curling symptoms can be caused by watering problems, diseases, herbicide damage, pests like broad mites, viral infection, etc. The most important part in treating tomato leaf curling is to correctly identify the cause for leaves curling. Depending on the direction of leaf curl, rolling up or down, and the position of tomato yellow leaf curl, at the bottom of the plant or top, the cause for the symptoms can be deduced and required steps can be taken to treat the tomatoes and leaves. Keeping your plant healthy by pruning regularly, checking for pest infestation, removing infested leaves, replenishing nutrients like nitrogen in the soil, and proactively treating any possible disease or damage will help in preventing stunted growth, maintaining bountiful fruit production, and promoting healthy plant growth.If this article about why do tomato leaves curl was helpful to you, also check out other popular and interesting articles like why do pipes burst, and why do your ears pop.What are tomato leaf curl and their types?Tomato leaves curling is a very common symptom found in growing tomato plants of all ages. This symptom doesn’t usually indicate harmful long-term disease in the plant and can be treated easily, once the cause of leaf curl has been found. Different causes of leaf curl can lead to the leaf curling in distinct ways. Depending on the type of leaf curl, the cause of leaf curl can be discovered and treated. The various types of leaf roll in tomato leaves are as follows.Leaves curl up when there are faults in watering. It is the most harmless and common type of leaf curl. Leaves will roll up when the plant is dealing with some type of environmental problem. Too much sun, hot temperatures, strong wind, watering problems, etc., are the most common causes for this type of leave curl. Leaves will curl up when there is a lack of water and moisture in the soil and will eventually dry and fall off. These environmental problems can be easily fixed and the result will show on your plant within a few days.Leaves will curl down when the plant is being overwatered. Correcting the watering of a plant can be tricky for beginners; excessive watering can cause root rot by excess moisture in the soil, yellowing of green leaves, fungal diseases, etc. The leaves curl up to cut off the water supply as a self-defense mechanism.Physiological leaf curl is caused by factors like stress and nutrient deficiency. It can be recognized by an upward roll of leaves and an inward roll of leaflets. You can notice it in lower and older lower leaves at the bottom of the plant. The rolling of affected leaves is accompanied by a sign like the leathery texture of a leaf, and retention in green color. If left untreated, it can cause severe damage by affecting all the normal leaves in the plant. Before the leaves begin to curl, the leaves will begin to yellow. It is best to replenish the nutrients like nitrogen in the soil at the early stage of damage when the leaves have only yellowed a bit.Leaf curl on the top of the plant is also known as the yellow leaf curl virus. It causes the new leaves at the top of the plant to curl and twist. This curl is not deadly for the plant but can cause stunted growth in the plant. The tomatoes on the plant, if any, will not be damaged and the disease does not spread to nearby plants. You can keep the infected plant in your garden till the end of the season and then replace it in the next one.What are the causes of leaf curl?Leaf curl is a very common symptom in tomato plants but can have many underlying causes. The cause of leaf curl can be discovered by observing the type of leaf curl. The various causes of leaf curl in a tomato plant are as follows.Environmental factors like stress, extreme sun, hot temperatures, lack of water and moisture, or herbicide damage cause upward leaf curl. This type of leaf curl is not severe and will not affect the tomato plant or its growth in the short term. It can cause damage if left untreated.Root rot and excessive moisture cause the downward curling of leaves. The leaves begin to curl downward to stop water from reaching the leaves. Stop watering the tomato plants till the top inch of the soil moisture is absent. If the root has begun rotting too much due to soil moisture, you can also cut the rotten part. This puts the plant at a very high risk of infection and shock, most plants do not survive. It’s best to remove the whole plant instead and replace it with other plants.Micronutrient deficiency causes the leaves at the bottom of the plant to curl up. Usually, the leaves turn yellow before they begin to curl. Nitrogen is one of the essential nutrients used by plants and can cause damage when the soil is deficient in it and other nutrients. Using compost and fertilizers will help maintain a healthy percentage of nutrients in the soil.Tomato mosaic virus causes mottling in healthy green leaves and will cause leaf curl up and get twisted in tomato plants. It might start affecting the fruits by inducing browning of the internal fruit wall, new growth, and total fruit yield for the season. Other factors like high temperatures might make the symptoms more severe.Herbicide drift also causes leaves to curl up. Many amateur gardeners don’t realize how sensitive tomato plants are to herbicide damage. You must be careful with the type and quantity of herbicide and compost you are using while gardening. If the chemicals in it are too strong they will damage the leaves irreversibly and pruning the damaged portions of the plant will be the only solution.Pests like broad mites and whiteflies also threaten the health and yield of the plant by damaging the stems, leaves, and fruits. Yellowing of normal leaves coupled with curled leaves is a sign of possible viral infection.How to treat curling leaves in tomato plants?Tomato plants are sensitive to the chemicals present in herbicides, insecticides, and compost, which is why gardeners find treating curling leaves in tomato plants tricky. Since curling leaves can have many causes the first step is to observe the type of curling the position of curled leaves in the plant. Depending on those observations gardeners deduce the actual cause of curling. Pests like broad mites and whiteflies can be treated with insecticides, pesticides, or herbicides. Before gardening, make sure you do enough research on the amount of medicine to be used and how to treat the plants using it. For environmental factors like too much sun, wind, or heat and high temperatures, simply place it in a different area where the environment isn’t as harsh. Control watering quantity to prevent root rot and leaf curling. If you notice leaf roll at the bottom stems of the plant, add some compost to the soil to replenish lost nutrients.Here at Kidadl, we have carefully created lots of interesting family-friendly facts for everyone to enjoy! If you liked our suggestions for why do tomato leaves curl then why not take a look at why do people dance, or why do leaves fall.
Tomato leaf curl can be caused by watering problems, deficiency, or diseases caused by a virus.
