There is no better feeling in the world than walking into your own garden and picking a big, red, juicy tomato off of the vine. Slicing into the gorgeous fruit and putting it onto your sandwich can be almost as satisfying as eating it. Homegrown, vine ripened tomatoes are one of the best things about summer!
As great as the feeling of your own fresh tomatoes can be, the feeling of utter dismay can be accompanied with growing them too. Pests munching on the plant can destroy your crop of delicious fruit. Disease can ravage the plant to the point of death. If that happened, it would be a horrible summer without a bountiful harvest of tomatoes.
Looking For Signs Of Pest Damage
First off, before troubleshooting for pest problems, it is important to remove all weeds and grasses from the planting bed. Remove all mulch from the area to expose as much of the soil as possible.
There are numerous things to look for while checking for tomato pests. Leaves with holes on them are common signs of a variety of pests. Most gardeners know what healthy plants look like. If your tomato plant doesn’t appear to be doing well, an investigation is needed.
Top 3 Tomato Pests
The fruit worm is a very common bug that can ruin a crop of yummy tomatoes. Fruit worms are approximately 1 1/2 inch in length and are a green-yellow color. They have 6 legs and 10 pro-legs. These pests burrow holes into the tomato and will make it inedible. Applying an insecticide that contains methymyl will clear up the fruit worm problem readily. Also, if you catch them early enough you can hand pick them off the plant for an organic pest control option.
Leaf miners are nasty little buggers that create holes in the tomato plant’s leaves. They are less than a tenth of an inch long and can be transparent or vivid yellow. Their heads are pointy. Using a microbial insecticide will get rid of leaf-miners and save your crop.
Greenhouse whiteflies are persistent little bugs that are similar in body style to moths. They have a yellowish hue to them. They eat the sap from your tomato plants. They cause the plant to stop growing normally as well as yellowing of the leaves, leaf dropping and lack of proper fruit production. The leaves and stem should be treated with insecticidal soap to remove and resist further infestation of whiteflies.
Top 3 Tomato Diseases
There are many signs of disease. Leaf issues and lack of thriving tend to be the most common symptoms. Check out the signs of the top three tomato diseases: Early Blight, Late Blight, and Verticillium Wilt.
Dark, ringed spots on leaves, yellow leaves or dead leaves can be a sign of Early Blight. These leaf problems will cause any growing fruits to be burned up by the sun. The bio-fungal insecticide named Serenade will help stop further fungal growth. It is pertinent that all plants be removed in fall as the fungi will survive through the winter and attack new plants in the spring. All debris should be removed from the garden area to prevent continued growth for the next season.
Late Blight was the nasty disease that caused the Great Irish Potato Famine. It caused many deaths and created the influx of Irish into America. The tomato leaves will have greasy gray spots with an area of white mold around it occasionally. This is highly contagious to other plants but Serenade will deter growth, it will not kill the disease. A thorough cleaning of the garden is warranted as Late blight will exist in the soil until new plants are installed and it will flourish again.
Verticillium Wilt will cause your tomato plant’s leaves to dry up and turn yellow. The name of the disease makes you think the leaves will wilt but they don’t. This fungus lives in the soil and can survive for several years without a host plant. Verticullium Wilt stops the plant from being able to absorb water which eventually will kill the plant. There are no treatments for it. The garden must be cleaned and left barren until the disease is no longer present.
Identifying a Nutrient Deficiency In Tomatoes
Nitrogen is essential for your tomato plant’s proper and healthy leaf growth. If your soil is lacking in Nitrogen, the plants will have smaller leaf growth, yellowed leaves, less shoot extension and minimal fruit production. Adding the proper amount of fish emulsion to the garden area will cure the problem. Do not add more than is required. Too much Nitrogen causes the plant to focus too much on growth, and not on stable root systems or fruit production.
Tomato plants that show a reddish or purplish hue to their leaves might have a phosphorous deficiency. The stems can be slender with leaf mottling as well as minimal fruit growth, if any. Finely ground up rock phosphate will do the trick. Too much cannot harm your tomato plant so don’t be frugal with its use. It will not harm the plant.
Want to learn more about troubleshooting tomato problems?
For more information, please visit:
Recognizing Tomato Problems by Colorado State University Extension
A Guide to the Identification of Common Tomato Problems
Thanks for identifying the problems but also providing some solutions.
There is a nice solution for easily monitoring tomato pests like tomato leaf miner. It’s called Trapview.
If I remove all my soil, what mixture should I put ? Like , top soil ? Potting soil ? Etc. my whole garden this pass summer was horrible. I plant creole tomatoes . Even my cucumber leaves have a white marking on them like something dragged its body all over the leaf. Like in circles .
I used the large 50 # bags of Miracle garden soil when i removed my soil .. I just use more off time to time and with a bag of compost manure as a dressing, and add coffee grounds 2 to 3 times a year and Epsom Salt for tomatoes, peppers and cucs etc, Google is wonderful
Pictures of each example would have been very helpful.
My Roma tomatoes get maybe 5 hrs of lite.. and I have good soil just lack of light the blosooms don’t set and shake hard every 3 days or so .. Lack of bees this .. Should i use Blosom set chemicaly .. My others in sun are fine with just shaking very firmly !! What should I do .. Use the Chemical spray or just wait it is only July 9th , 2016 West side , garden level with deck above me garden out my windows on west side 🙂