In May, the weather is generally pleasant with gradually rising temperatures and significant temperature differences between day and night. Occasional rain showers may occur, making the air slightly humid while the soil remains dry. This climate is ideal for the development and spread of common vegetable diseases, so farmers should remain vigilant and take necessary precautions.
For protected vegetables, especially Solanaceae crops like tomatoes and peppers, issues such as blossom end rot, sunscald, soft rot, powdery mildew, and tomato leaf mold are frequently observed. In melon crops, powdery mildew, downy mildew, blossom end rot, and viral infections are also common. To manage these diseases effectively, farmers should combine good agricultural practices with scientific pesticide use. Additionally, applying foliar fertilizers, plant growth regulators, and calcium supplements can help prevent nutrient deficiencies. In major vegetable production areas like Shouguang in our province, calcium deficiency often causes fruit to lose value early in the season, making timely calcium supplementation essential.
Common pests in protected vegetables include leaf miners (Liriomyza sativae), whiteflies, tea thrips, spider mites, aphids, and thrips. It is recommended to use physical and biological control methods in greenhouses to reduce chemical dependency and maintain a healthier growing environment.
In open-field vegetables, cabbage, and sugar beets, pests like the diamondback moth (Plutella xylostella) and the beet armyworm (Spodoptera exigua) are prevalent. At high temperatures, biological insecticides such as Bt (Bacillus thuringiensis) are effective for controlling these pests. For instance, 0.36% matrine aqueous solution at 800 times dilution, 5% anti-Tai Bao at 1000 times, or 15% DuPont hit suspension at 3500–4500 times can be used. These treatments can also help manage the diamondback moth.
Leguminous crops such as beans are prone to pod borer infestations and spider mites, along with diseases like rust, leaf mold, powdery mildew, and downy mildew. In open melons and eggplants, the 28-spotted ladybug is a common pest that requires attention.
Farmers are advised to monitor their crops regularly, implement integrated pest management strategies, and stay updated on local weather conditions to better prepare for potential threats. By combining cultural, biological, and chemical control measures, they can ensure healthy crop growth and higher yields.
Polysaccharide
Polysaccharide is a polymeric carbohydrate composed of more than 10 monosaccharides and sugar chains bound by glycosidic bonds. Polysaccharides composed of the same monosaccharides are called homopolysaccharides, such as starch, cellulose and glycogen; Polysaccharides composed of different monosaccharides are called heteropolysaccharides. For example, gum Arabic is composed of pentose and galactose. Polysaccharide is not a pure chemical substance, but a mixture of substances with different degrees of polymerization. Polysaccharides are generally insoluble in water, have no sweetness, can not form crystals, and have no reducibility and rotation change. Polysaccharides are also glycosides, so they can be hydrolyzed. In the hydrolysis process, a series of intermediate products are often produced, and finally monosaccharides are obtained by complete hydrolysis.
Ganoderma lucidum polysaccharide is a secondary metabolite of the mycelium of Ganoderma lucidum, which exists in the mycelium and fruiting body of Ganoderma lucidum.
Ganoderma lucidum polysaccharide has unique physiological activity and clinical effect, and is safe and non-toxic. It can be widely used in medicine, food and cosmetics industries. Ganoderma lucidum polysaccharide can improve the body's immunity. When the body's immunity of cancer patients is damaged by radiotherapy and chemotherapy, it can be combined with radiotherapy and chemotherapy to cure the disease. In addition, Ganoderma lucidum polysaccharide can also inhibit the release of allergic reaction media, so as to block the occurrence of nonspecific reaction, so it can inhibit the recurrence and metastasis of cancer cells after operation. Ganoderma lucidum preparations that have been put into use include tablets, injections, granules, oral liquids, syrups and wines, all of which have achieved certain clinical effects. As a functional factor, Ganoderma lucidum polysaccharide can be made into health food, and can also be added into beverages, cakes and oral liquids as Food Additives, which greatly enrich the food market. Because Ganoderma lucidum polysaccharide has the effect of anti free radical, it can be used in cosmetics to delay aging.
Black Truffle Extract, Ganoderma Extract, Coprinus Comatus Extract , Cordyceps Militaris Extract
Xi'an Tian Guangyuan Biotech Co., Ltd. , https://www.tgybiotech.com