Whitefly, also known as small white moth, is a worldwide pest in the order Ameliidae of the order Homoptera.
Whitefly is harmful to vegetables, fruit trees, medicinal materials, pasture, tobacco and other plants. Generally, it can cause losses of 10% ~ 30%, and in severe cases, it can be as high as more than 70%. Among vegetables, eggplants, peppers, cucumbers, tomatoes, etc. are particularly affected.
At present, whitefly has become the main pest of greenhouses, greenhouses and open-air vegetables. The degree of damage is increasing year by year, and prevention and control is difficult. Seriously restricting the output and quality of vegetables.
1. Whitefly hazards and occurrence patterns
The suitable temperature for adult powdery mildew activity is 22°C ~ 30C, and the suitable temperature for reproduction is 18°C ~ 21C. It has the characteristics of tenderness, yellowness and phototropism.
Both adults and nymphs like to swarm on the underside of plant leaves and use their piercing-sucking mouthparts to suck plant juices, causing the damaged leaves to chlorotic, yellow, wither, or even the entire plant to die.
It also secretes a large amount of nectar, contaminating the leaves and fruit surfaces, causing sooty stains. In addition, whiteflies often act as vectors for viral diseases.
Due to the close connection and alternation between greenhouses and open-field vegetables in recent years, the damage of this insect has occurred year after year.
In the application of whitefly control, some pesticides only kill adults but not eggs, causing the eggs to hatch and the adults to persist. Some pesticides only kill the eggs but not the adults, causing the adults to continue to lay eggs and the adults to persist after the eggs hatch.
2. Prevention and control of whiteflies
1. Nitenpyram + dinotefuran + pyriproxyfen, super contact killing + triple systemic absorption + long-lasting ovicide + good safety.
2. Triple systemic whole-plant transmission: the ultimate application combination for whitefly, with longer lasting effect.
