What is the reason behind the plums turning black inside

Plums are delicious fruits that are enjoyed by many due to their sweet and juicy flesh. However, sometimes you may come across plums that appear perfectly fine on the outside but have turned black inside. This occurrence can be perplexing and leave you wondering what could be the reason behind it.

One of the primary causes of plums turning black inside is a condition called fungal rot. Fungal spores are present everywhere, including on fruits. Under favorable conditions, these spores can germinate and infect plums, leading to their decay. When a plum becomes infected, it starts to deteriorate from the inside, causing the flesh to turn black.

Fungal rot can be caused by various fungi, including species of Botryosphaeria, Penicillium, and Monilinia. These fungi generally gain entry into the plum through injuries or wounds on the fruit’s surface. Damages caused by insects, birds, or improper handling during harvest and storage can make plums vulnerable to fungal infection.

Poor storage conditions can also contribute to plums turning black inside. Plums are highly perishable fruits and require proper handling and storage to maintain their freshness. Exposure to high humidity levels, especially in the presence of fungal spores, can accelerate the growth of fungi and result in the blackening of the fruit’s flesh.

Moreover, plums that are overripe or have been stored for an extended period are more prone to developing rot. Overripe fruits tend to soften, making it easier for fungi to infect the flesh. Therefore, it is essential to consume or preserve plums when they are still fresh and firm to minimize the risk of internal decay.

Another possible reason for plums turning black inside is bacterial infection. Bacteria like Erwinia amylovora, commonly known as fire blight, can cause plum fruits to rot from the inside. Fire blight primarily affects flowers and fruits, leading to their discoloration and decay. Plum trees infected with fire blight can transfer the bacteria to the fruits, resulting in blackening of the flesh.

To prevent plums from turning black inside, there are several precautions you can take. First and foremost, handle the fruits gently and avoid causing any injuries or bruises. If you notice any damaged plums, it is best to consume them promptly or discard them to prevent the infection from spreading.

Additionally, ensure that the plums are stored in a cool and dry place. Excess moisture can create a favorable environment for fungi to grow and infect the fruits. Regularly inspect the plums, especially those nearing ripeness, as they are more vulnerable to internal rot.

If you are planning to preserve plums for an extended period, consider storing them in the refrigerator. Lower temperatures can slow down the growth of fungi and bacteria, increasing the shelf life of the fruits.

In conclusion, plums turning black inside can be attributed to fungal or bacterial infections. Proper handling, storage, and inspection of plums are crucial in preventing internal decay. Enjoying fresh and healthy plums requires being mindful of the fruits’ condition and taking appropriate measures to ensure their quality.