The cabbage butterfly, also known as the cabbage white butterfly, is a common pest that affects cruciferous vegetables, especially cabbages. The larval stage of this insect is commonly referred to as the cabbage caterpillar and is one of the most damaging pests in vegetable farming.
These larvae feed on the leaves of the plants, and their excrement contaminates the foliage, making it unsuitable for consumption. In rainy conditions, the damaged leaves are more prone to soft rot. The ideal temperature for the development of this pest is between 20°C and 25°C, with a relative humidity of around 76%. The damage caused by the cabbage butterfly is usually most severe during spring and autumn when the weather is cooler—conditions that favor its reproduction and activity.
To manage this pest, biological control methods are widely used. For example, 1.8% Avedine EC can be applied at a rate of 3000–4000 times dilution, or 0.9% ECDF at 2000–3000 times. Another option is using Bacillus thuringiensis (Bt) at a dilution of 500–800 times or 1000 times. Farmers can also prepare their own biopesticides by collecting infected cabbage butterfly larvae from the field and making a virus solution.
Identifying susceptible larvae involves observing the effects of the granulosis virus. Initially, the larvae may not show obvious symptoms, but over time, they turn from greenish to yellowish-white. As the disease progresses, the larvae stop molting, their body segments become swollen, and eventually, they die. The dead larvae release yellowish-white, odorless fluids and often hang upside down or in an "eight-shaped" position on the leaves.
Once collected, the diseased larvae are crushed and mixed with water to create a virus solution. When stored in a refrigerator at around 7°C, the solution retains its effectiveness for up to a year. This homemade biopesticide works best when applied to early-stage larvae (instars 1–3), providing effective control. The number of applications varies depending on the vegetable type. For example, cabbage is typically sprayed 1–2 times from planting to harvest, while kale may require 3–4 sprays with intervals of 10–15 days. A recommended dosage is 3–5 grams of 5-year-old corpses per acre, mixed with 37–50 kg of water for spraying.
Amino Acid Chelate Compound
The main effects and production process of
Amino Acid chelate: improve bioavailability: after the metal ions in amino acid chelate are combined with amino acid, its absorption and utilization in human body or plants and animals are greatly improved, improve stability: amino acid chelate is more stable in and out of the body and does not easily react with other components, thus maintaining the activity of minerals.
Promote plant growth: In agriculture, amino acid chelate can be used as trace element fertilizer to improve the absorption of trace elements by plants and enhance their disease resistance and growth rate.
High purity amino acids and metal salts are selected as raw materials. Common amino acids include glycine, lysine, etc. Metal salts include zinc sulfate, magnesium sulfate, etc. The amino acid solution is mixed with the metal salt solution in a certain proportion and the reaction is carried out under suitable pH and temperature conditions. This process is usually carried out in a stirred reactor to ensure a homogeneous reaction.
The quality of the produced amino acid chelate is tested to ensure that its purity and stability meet the requirements. Finally, the product is packaged to prevent moisture and contamination.
Amino acid chelates are widely used in human and animal nutritional supplements and plant fertilizers because of their high efficiency and safety.
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