Biopesticide: Natural Berberine from Berberis aristata
Plant-derived fungicides are a class of fungicides that utilize certain antibacterial substances contained in some plants or induced plant defense substances to kill or inhibit the growth of pathogens. They have advantages such as high efficiency, low toxicity or non-toxicity, easy degradation, high selectivity, and no development of drug resistance.
Based on existing research results, there are many types of active antibacterial components in plants, covering almost all types of plant components, such as terpenes, alkaloids, flavonoids, fatty acids, anthraquinones, esters, phenols, aldehydes, alcohols, organic acids, and essential oils.
Existing research indicates that the antibacterial mechanisms of plant-derived antibacterial active substances are complex and diverse, acting on multiple structures of bacterial cells. By disrupting the integrity of the cell wall and cell membrane, interfering with enzyme systems, and affecting spore germination, hyphal growth, appressorium and fruiting body formation, as well as respiratory metabolism and nucleic acid content, they inhibit bacterial growth and reproduction.
pic1: plutella xylostella
pic 2: cabbage caterpillar
pic 3: Tetranychus cinnabarinus
pic 4: aphid
pic 5: apple ring rot
Bioactivity
Studies have reported that berberine has a strong antifeedant effect on lepidopteran pests such as diamondback moth, and may cause pests to die by affecting the activity of superoxide dismutase and other metabolism-related enzymes in the pests.
Studies have found that berberine ethanol extracts have a good antifeeding effect on diamondback moth and cabbage caterpillar larvae, with an antifeeding rate of over 60%.
In addition, berberine has a toxic effect on Tetranychus carmine, with a control efficacy of over 75% three days after application. Berberine hydrochloride also has certain antifeedant and toxic activity against aphids on cabbage.
Preparation
0.6% Berberine Aqueous Solution
Target of prevention and control
Control of apple ring rot
Applied technology
Dilute 800-900 times and spray.