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Tip Blights are a group of diseases that cause damage to the terminal ends of shoots and branches of many types of plants. Many tip blight pathogens are serious issues on conifers, and initial damage is noticeable as curling, browning needles and shoots on new growth at the end of branches. This damage is often confused with damage caused by insects like pine shoot moth larvae, however upon closer inspection diagnosis is easily seen through the lack of larvae present, as well as the black lesions left on new seasons plant tissue that has been affected by tip blight. The most common and most damaging type of tip blight is Diplodia Tip Blight, which affects many types of conifers including various species of pine, spruce, and fir. In addition to damaged terminal growth and easily seen black lesions/spores on tan leaf tissue and affected cones, diplodia tip blight also can cause cankers which can be quite severe and cause branch death. Where tip blights like arborvitae tip blight are secondary diseases and not entirely damaging themselves, Diplodia tip blight causes severe injury to affected trees. This disease used to be referred to as Sphaeropsis tip blight and is often called pine tip blight, spruce tip blight, or other similar names. When dealing with affected plants, it is essential that damaged plant tissue is removed to prevent propagation of the disease year after year. All cones with disease spores, even fallen cones, should be removed in the summer when disease activity stops and the plant is dry to prevent the spread of spores. All damaged shoots should be pruned from the tree along with branches that have cankers. It is essential that pruners be sterilized after every cut by being dipped in alcohol, so as to not continue the spread of the disease during pruning. Once all plant material with the disease has been removed and destroyed, fungicide applications should be applied in subsequent years. When looking for how to control diplodia tip blight in conifers, ensure that you use professional fungicides and apply them preventatively, as curative applications will not control the disease at all. Fungicides must be applied before bud break of new shoot growth, followed by a second application when the new growth is at half candle, and then a third application once the new growth has reached full candle and completed growth. Failure to apply fungicides at all three stages can result in disease resurgence on the infected plant.