Causes and Control Measures of Luffa Flower Rot in Greenhouses

Winter temperatures are inherently unsuitable for luffa growth, but improved greenhouse technology makes it possible to eat luffa even in winter. Flower rot in luffa is also a fairly common phenomenon, which has a great impact on luffa yield and has brought considerable economic losses to farmers. So what causes luffa flower rot? How should it be controlled? Let's take a look together.

I. Analysis of Symptoms and Causes of Rotten Melon

1. Along with the rotting of the flower, the style also develops black rot. This may be a disease caused by a deficiency of calcium and boron elements in the soil, and it is also caused by poor root absorption capacity and uncoordinated water supply. You can spray foliar fertilizer containing calcium and boron elements, and at the same time pay attention to nourishing the roots and enhancing the root absorption capacity, which can very effectively prevent this phenomenon from occurring.

2. The edges of the petals become dry and withered, showing dry rot, and the entire petal appears stale. This may be a manifestation of phytotoxicity or gummy stem blight. Gummy stem blight occurs more severely under low-light conditions, especially after consecutive cloudy days. You can spray thiophanate-methyl or spray agents such as Shibaogong to reduce the occurrence of the disease.

3. Watery rot starts from the edges of the petals, and in severe cases the petals may even drip water, accompanied by a tea-colored appearance, but without white mold appearing. This phenomenon may be caused by bacterial soft rot, but if white mold grows, it may be caused by flower rot or cottony leak, and the bacteria occur more severely under high-temperature and high-humidity conditions. You can spray agents such as streptomycin, norfloxacin, and new plantamycin to reproduce soft rot, and spray agents such as Kelu, Kejia, Anke, and Redomir to control flower rot or cottony leak.

II. Control Measures

1. Concentration of the flower-dipping agent

The flower-dipping agent is generally based on naphthalene acetic acid and 2,4-D, combined with an appropriate amount of nutrient solution and an agent for controlling gray mold for flower dipping, which can effectively prevent luffa flower rot.

2. Smoking

Smoking is also a way to control luffa flower rot. It is generally 3-4 days after flower dipping that the peak period of flower rot occurs, and this is also the best period for smoke control. Procymidone smoke agent and chlorothalonil smoke agent can be used alternately for control.

3. Preventing phytotoxicity

Luffa flowers are delicate, and improper spraying can easily cause phytotoxicity. Therefore, when spraying during the flowering period, you must pay attention to the choice of agent, and the spraying concentration must be used according to the instructions. Do not arbitrarily increase the concentration of the medication, so as to avoid phytotoxicity.

The above is an introduction to the causes and control measures of luffa flower rot in greenhouses. I hope it can help you. If you want to learn more related knowledge, please follow us.