Pay attention to the prevention of "Crisis" white rot and downy mildew

Crenson Seedless Grape, also known as Karen and Lady Red, is a new variety of late-maturing seedless grape originally introduced from the United States. This variety is highly valued for its excellent flavor and high yield potential. However, it has a notable weakness: poor disease resistance, especially to white rot and downy mildew. These diseases can cause severe damage during the rainy season if not properly managed, leading to early defoliation, fruit rot, and even total crop loss in extreme cases. As a result, farmers often suffer significant economic losses. Over the past few years, we have developed effective strategies to manage these diseases in a sustainable and environmentally friendly way. Below are the key prevention and control methods for white rot and downy mildew during the rainy season. **1. White Rot** **Symptoms:** White rot primarily affects the leaves, shoots, and fruit clusters of Crenson Seedless Grapes. Young shoots are particularly vulnerable during hot and rainy summers. Once infected, the fruit stems and berries become soft and decayed. Severe infections lead to premature leaf drop, which significantly reduces both yield and fruit quality. Infected leaves develop large brown, ring-shaped spots that eventually break down, causing the leaves to lose their function. New shoots may also be affected through wounds, resulting in water-soaked, brown lesions. In severe cases, the shoots may die, stunting the growth of young vines. High humidity and frequent rain create ideal conditions for the spread of this disease, with heavier infections occurring in poorly drained soils. **Control Measures:** White rot typically occurs between mid-June and August, when temperatures are high and rainfall is frequent. After fruit bagging, apply a 1:0.7:200 Bordeaux mixture every 15 days to protect the leaves and shoots. Alternating with 80% carbendazim at 1000 times dilution or 80% chlorothalonil at 800 times dilution can enhance effectiveness and reduce the risk of resistance development. **2. Downy Mildew** **Symptoms:** Downy mildew is one of the most destructive diseases affecting the leaves of Crenson Seedless Grapes. It becomes more prevalent from mid-June to September, especially under wet and humid conditions. Cool, moist weather, fog, and frequent rain all contribute to its spread. The disease tends to affect younger leaves more than older ones. Fortunately, once the fruit is bagged, it is generally protected from infection. However, unbagged fruits may still be at risk. **Control Measures:** It is essential to spray Bordeaux mixture promptly after fruit bagging to provide protection. Apply it every 10–15 days, depending on the severity of other diseases. During periods of heavy rain or when downy mildew is severe, additional fungicide applications are necessary. For example, apply a 52.5% propamocarb solution diluted to 2000 times, 66.8% azoxystrobin at 1000 times, or 59% cyprodinil at 600 times. Rotate between different fungicides to prevent the development of resistant strains. Regular monitoring and timely intervention are crucial for long-term disease management.

Health Food Additives

Mogroside is a sweet component of Siraitia grosvenorii.

Mogroside, also known as Mogroside (or Mogroside), has high plant content and good water solubility. At present, the product with purity of more than 98% has been used as food additive. [1] it is extracted from Mogroside, a special economic plant in Guangxi. Its sweetness is 300 times of sucrose, and its heat is zero. It has the effects of clearing heat, moistening lung, relieving cough, moistening intestines and defecating Diabetes and other diseases have preventive and therapeutic effects. Siraitia grosvenorii sweet can be used in all kinds of food. The content and sweetness of Mogroside V are both higher in Siraitia grosvenorii fruit, and its sweetness is about 300 times that of sucrose. It is a low calorie, non nutritive, non fermentative Sweetener and the main sweet ingredient.

Product Name:Organic Monk Fruit Extract

Active Ingredient:MogrosideV 25% 40% 50%

Latin Name: Siraitia grosvenorii

Grade: Healthcare products

The Specification Of Luo Han Guo Extract:

1. Luo Han Guo Extract 98% Mogroside V

2. Luo Han Guo Extract 80% Mogrosides / 25% Mogroside V

3. Luo Han Guo Extract 85% Mogrosides

4. Luo Han Guo Extract 90% Mogrosides /30% Mogroside V

5. Luo Han Guo Extract 95% Mogrosides

6. Luo Han Guo Extract 25%,30%,40%,50% Mogroside V

7. Luo Han Guo Extract Concentrated juice 60~65 Brix, 1% ~2% Mogroside V

1. Antioxdant
2. Decrease blood sugar
3. Anti-cancer
4. To relieve cough and expectorant
5. Improve immunity

6. Protect liver

1. Contains zero Calories per serving!
2. Safe Even For Diabetics and Hypoglycemics!

3. Cool the lung

4. Treatment of Cough

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Product Recommended

Coenzyme Q10,Coenzyme Q10 Powder,Mogroside 40%,Sucralose Powder

Xi'an Tian Guangyuan Biotech Co., Ltd. , https://www.tgybiotech.com