What is the most effective pesticide for scale insects
When the leaves of plants appear waxy white spots or sticky secretions, they are likely to be infested by scale insects. These pests, with a body length of only 2-5 millimeters, weaken the plants by刺吸 their sap, and can cause the entire plant to die in severe cases. This article will systematically analyze the use of three highly effective pesticides and provide a comprehensive prevention and control plan combining physics and chemistry.
Analysis of Three Highly Effective Pesticides for controlling Scale Insects
Chlorpyrifos: Broad-spectrum insect-killing strike force
40% Chlorpyrifos emulsifiable concentrate 1000 times liquid can penetrate the waxy layer of pests, achieving a mortality rate of over 95% for adults. It is recommended to spray in the evening, focusing on the back of leaves and crevices of branches, applying once every 7 days for 3 times to form a protective net. It should be noted that this pesticide has an刺激性 odor and requires proper ventilation when used indoors.
Thiamethoxam: Environmental long-acting pesticide
25% Thiamethoxam water-dispersible granule 2000 times liquid has bidirectional systemic properties, suitable for both foliar application and root irrigation. When mixed with an organic silicon synergist at a 1:1 ratio, the penetration rate increases by 3 times and the duration of efficacy extends to 20 days. It is especially suitable for plants with thick waxy layers such as succulents and orchids.
Organosilicon penetrant: Pest egg nemesis
0.5% Organosilicon solution can increase the area of the pesticide solution by 60%, effectively penetrating the protective membrane of pest eggs. When using, add 0.3% of the total amount of the pesticide, focusing on spraying the soil surface and the forks of branches. Preventive use once a month can interrupt the breeding chain of scale insects.
Four-dimensional Stereoscopic Control Plan
Physical removal skills
When initially discovered, wrap the pest with a 75% alcohol cotton ball for 10 seconds and use a soft-bristle brush to remove the eggs. For severely infected plants, isolate and prune, and apply sulfur powder to the cut to prevent secondary infections.
Key points of environmental control
Keep the day-night temperature difference below 8℃, humidity between 60%-70%, and regularly rinse the leaves with a high-pressure water gun. For potted plants, pour boiling water over the surface of the pot every quarter to kill over 95% of overwintering nymphs.
Through the comprehensive management of pesticide rotation and environmental regulation, a long-term protective system can usually be established within 2-3 growth cycles. It is recommended to establish a control calendar, focusing on prevention and control during the spring shoot germination period (March-April) and at the end of autumn (October-November), combined with yellow board monitoring, to achieve sustainable control of scale insects.