ver, if you notice an aphid attack then it is best to treat it as soon as possible. The reason is that they can quickly encourage and spread fungal diseases.
The main disease of Daphne are fungal infections and general ill health causing browning or yellowing of leaves. These are almost always caused by environmental factors, the key on being too much or too little watering. Get the moisture correct at the roots and your Daphne should be problem free.
They are also susceptible to Honey Fungus but this is not specific to Daphne, so are many shrubs. If they are affected by this fungus it's best to remove the shrub and plant something which can resist it.
All parts of daphnes are toxic, the berries being particularly so. One active compound is daphnin, a glycoside, combining glucose with daphnetin. Some species have been shown to contain a further toxin, mezerein. Symptoms of ingestion include burning sensations and lesions of the mouth and upper digestive tract, gastroenteritis and diarrhoea, and in severe cases, damage to the kidneys (nephritis), irregular heart rhythm, and coma.
Daphne Companion PlantsDaphne
looks good planted in a mixed shrub border or with tall growing perennials such as peonies and baptisia. You can also plant daphne near walkways, windows and patios to enjoy the sweet fragrance in spring. Daphne is also an attractive woodland plant when grown in filtered light under tall deciduous trees. Often woodland plantings are more protected from winter winds as well as the intense summer sun.