Why does zucchini rot at the flower? Causes and control methods

Zucchini is a common vegetable for us, and during its cultivation, flower rot often occurs, seriously affecting yield and causing huge economic losses to farmers. So what causes zucchini flower rot? How should it be controlled? Let's take a look.

1. Causes of the disease

There are multiple causes of zucchini flower rot, among which the most important is disease, and the representative of these is gray mold, a disease that mainly damages flowers. In addition, when the temperature drops, the flowering period of zucchini has strict temperature requirements; once the temperature is too low, its flowers will stop growing, and over time they will suffer damage. There is also excessively high humidity, which breeds pathogens that infect the flowers, hindering root development and reducing absorption capacity, so the flowers cannot obtain sufficient nutrients to grow and then rot.

2. Symptoms of the disease

At first, water-soaked lesions appear on the flowers, and the lesions gradually expand and develop wet rot. In the later stage, gray-black mold fuzz also appears, which is the typical sign of gray mold infection. Some wet-rotted flowers also show pus-like discharge, generally grayish-white or yellowish-brown, accompanied by a foul odor. Therefore, when controlling the disease, it is essential to distinguish the symptoms well and treat them accordingly, while also strengthening management to prevent the disease from occurring.

3. Control methods

With gray mold as the main target, mixing bacterial agents in during planting can kill the pathogens carried by the seeds and reduce the chance of gray mold occurring. At the same time, adding trace elements such as boron and calcium to the base fertilizer can inhibit the growth of harmful pathogens and reduce disease. Also, during cultivation, attention should be paid to changes in temperature and humidity. Once low-temperature weather occurs, insulation should be carried out promptly, and during the rainy season, drainage should be done promptly to reduce humidity. At the same time, in special weather such as cloudy and snowy days, substances such as chitin fertilizer, Harvest No. 1, and cytokinin can be sprayed to enhance the plant's resistance, and appropriately increasing the application of phosphorus and potassium fertilizer can enhance the plant's disease resistance.

The above is an introduction to the causes of zucchini flower rot and control methods. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.