Citrus greening disease is caused by the bacterium Candidatus Liberibacter asiaticus. There is no known cure for the disease.

Every autumn we revel in the beauty of the fall colors. The mixture of red, purple, orange and yellow is the result of chemical processes that take place in the tree as the seasons change from summer ...

This time of year, many black walnut trees’ leaves may have black spots, turn yellow and begin to drop. This is commonly known as anthracnose, a fungal disease that causes trees to drop their leaves ...

Another study found that carotenoids from pomelo leaves exhibit anticancer activity, potentially helping to inhibit certain ...

It’s autumn, and that means the leaves on the trees are turning beautiful shades of yellow and red, before falling off entirely. It provides cheap entertainment for people and pets. It’s a way ...

Trees are amazing! Not only do they store a lot of carbon from the atmosphere, which helps to combat climate change, they also make a great habitat for lots of the UK's wildlife - from birds ...

Scramble high enough above the tree line in the mountains of Africa, Asia, Hawaii, and the Americas, and you will see thick towers of plants crowned by mops of living and dead leaves. In a poetic ...

Several things come into play when it comes to determining the colors that we find on leaves of our trees. As our days get shorter and our nights get longer there is a chemical change that happens in ...

So, we know why leaves change color. The next step is for them to fall. As the temperatures drop and the nights grow longer, the trees decrease the production of auxin, which is a hormone in trees ...

The trees in your garden and your neighborhood endured a serious dry spell this year, which may affect their fall leaf color. “The weather is the biggest factor that determines when the color ...

Infected trees produce fewer fruit. The fruit that does grow is partially green, smaller, shaped irregularly and bitter tasting. It may drop from the trees before ripening. Leaves may show blotchy ...

It may drop from the trees before ripening. Leaves may show blotchy mottling. According to the U.S. Department of Agriculture, the 2022-2023 growing season was the least productive since 1936.