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My Raspberry Leaves Are Turning Yellow

Updated February 21, 2017

Raspberries and blackberries grow on similar bushes and produce clusters of berries at the end of the summer. Raspberry plants are hardy, fast-growing cane plants that produce a large harvest when healthy, and picking raspberries can become a project for the whole family. If your raspberry leaves are yellowing, it's a sign of distress that can affect the size and quality of your harvest.

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There are two types of chlorosis that can affect raspberry leaves. If the leaves are yellow with green veins, the raspberry plant is suffering from an iron deficiency. Over time, iron deficiencies turn the leaves yellow and weaken the bush's production of new growth and raspberries later in the season. If the leaves are green with yellowing veins, the raspberry bush has veinal chlorosis, which is spread by nematodes and caused by a virus. It can stunt leaves and reduce the harvest size.

Raspberry Mosaic Disease

Raspberry mosaic disease is a viral disease that causes a variety of problems for raspberry plants, including the mottled yellowing of leaves from which it draws its name. Other symptoms can include stunted growth, leaf blisters and brown tips on leaves, according to the University of Minnesota Extension. This disease is spread by the raspberry aphid. Pest control is crucial to preventing the contraction of the disease. Infection stunts growth and affects the quality of the raspberries.

Root Rot

Phytophthora root rot is a fungal disease that affects the soil and roots of raspberry plants. As the disease progresses, the leaves of the raspberry bush will turn yellow around the edges and wilt or appear scorched, the University of Minnesota Extension reports. This disease kills raspberry canes and bushes in a short period of time. Treat the plant with a fungicide and remove any raspberry bushes that exhibit severe wilt and damage to stop the disease from spreading.

Pest Problems

Pest problems, including issues with aphids, Japanese beetles, raspberry cane borers and other insects, have the potential to cause the leaves of the raspberry plant to turn yellow in a short period of time. As insects feed on the plant, the leaves lose nutrients and are injured by the bites of the insects; both of these factors contribute to yellowing leaves and ragged edges, which weakens the plant. Apply a pesticide to the bush regularly to protect it from insects.

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About the Author

Bailey Shoemaker Richards is a writer from Ohio. She has contributed to numerous online and print publications, including "The North Central Review." Shoemaker Richards also edits for several independent literary journals and the Pink Fish Press publishing company. She holds a Bachelor of Arts in creative writing from Ohio University.

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