In recent years, with the expansion of mulberry cultivation areas, pest problems on mulberry trees have been gradually increasing. Among these pests, lepidopteran species have become particularly problematic, causing significant damage and posing a major threat to summer and autumn harvests. According to field surveys, there are four primary reasons behind this growing issue.
First, environmental conditions play a key role. In humid weather, the hatching rate of mulberry eggs can reach as high as 100%, whereas in dry conditions, it drops significantly to 50% or even less. Moreover, the recent trend of warmer winters has greatly improved the survival rate of overwintering pests, allowing their populations to grow unchecked.
Second, some mulberry fields lack proper management. Some farmers, who have shifted back to silkworm rearing for income, neglect essential practices like weeding, pest control, and timely spraying. Others fail to monitor insect populations effectively, sometimes even ignoring serious infestations, which leads to severe pest problems in certain areas.
Third, improper pesticide use is a major concern. If farmers follow the guidelines from the sericulture sector, pest control should be straightforward. However, many farmers do not adhere to standardized application methods—such as using the correct concentration, timing, or type of pesticide. Instead, they often mix multiple pesticides together, leading to rapid development of resistance among pests and poor control outcomes. This creates a cycle where higher concentrations are used, further worsening the problem.
Fourth, incorrect timing of pesticide application is another issue. Many farmers fail to detect young larvae early, waiting until visible damage occurs before taking action. For instance, the best time to treat mulberry pests is during the egg-hatching stage. If treatment is delayed until the third instar stage, the effectiveness of the pesticide drops significantly. Additionally, some farmers use the same pesticide year-round, accelerating resistance and reducing overall efficacy.
To effectively manage mulberry pests, especially during silkworm rearing periods, targeted and safe pesticide use is essential. Pesticides must be selected carefully to avoid harming silkworms while still being effective against pests. Each pest control operation should use only one type of pesticide, with different types alternated to prevent resistance. The concentration should not be too high, and careful spraying techniques are crucial.
Surveys also revealed that some farmers purchase common pesticides like dichlorvos or phoxim from official agricultural suppliers. However, there are concerns that some manufacturers may add unknown ingredients to enhance broad-spectrum effects, which can be harmful to silkworms. Currently, two specific pesticides are recommended for sericulture: 40% Sangbao emulsifiable concentrate and green planted emulsifiable concentrate. These are highly toxic but systemic insecticides that target both lepidopteran and homopteran pests, offering both stomach and contact toxicity. They are cost-effective (only 4 machines per mu) and provide good safety when used properly.
Door Hardware
The classification mainly includes the aluminum or zinc alloy die casting Machinery Parts using in Door Hardware area.
In the die casting process,higher specific pressure is required, so that higher filling speed can be obtained.which is beneficial for alloy to overcome mold filling resistance.and effectively fill each part of the cavity.The Casting General Tolerance is Grade GB-CT4.
Process Technology: High pressure die casting,Shot Blasting,NC Machining,Spray Coating
Product Dimensions: Customized
Casting General Tolerance: Grade GB-CT4
Flow Processes: Die casting, Degating,Polishing and Deburring to remove the burrs, Polishing to remove the parting line, flash,CNC Turning, Cleaning, Packaging, Storaging,Shipping
Control Measure: Incoming Material Test, First Article inspection, Routing inspection, Final item inspection, and Outgoing quality control
Inspection Equipment: CMM, Caliper, Plug Gage, Screw Gauge
Application: Hardware Parts
Certificate: IATF16949:2016,ISO14001:2015,ISO45001:2018
Lead Time: 30-35 days
Trade Term: FOB Ningbo
Die Casting Door Hardware Parts,Aluminum Die Casting Door Hardware Parts,Zinc Die Casting Door Hardware Parts,Malaysia Zinc Part
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