The Occurrence and Control Techniques of the Corn Leafworm (Twinkle Leafhopper)

The Occurrence and Control Techniques of the Corn Leafworm (Twinkle Leafhopper)

First, the symptoms of damage

The pest primarily affects the leaves, tassels, and ears of corn. When the leaves are damaged, they are often eaten, leaving only the epidermis behind. This results in large, transparent white spots on the leaf surface, which significantly hinders photosynthesis. The damage to the tassels and ears can interfere with the pollination process, reducing the overall quality and yield of the crop. On average, this pest can cause a 15% loss in corn production.

Second, the time of occurrence

The main feeding activity occurs from July to August, during the early heading and flowering stages of maize. The pests are most active in the afternoon, with peak feeding times between 10:00 AM and 5:00 PM. This is when they cause the most damage to the crops.

Third, prevention and control measures

1. **Agricultural control** Removing weeds around the field edges, ditches, and irrigation channels is essential to reduce the population of the pest. In autumn, deep plowing can help destroy eggs that have been laid in the soil, thus lowering the number of pests in the following season.

2. **Chemical control** - Apply a 5,000-fold dilution of pyrethroid insecticides such as cypermethrin or cyhalothrin. These are effective against a wide range of pests and provide good protection for the crop. - Use 45% chlorpyrifos EC at a 1,500-fold dilution. This treatment not only targets the pest but also helps manage other common corn pests like armyworms, corn borers, thrips, and chafers. It is recommended to apply these sprays in the late afternoon or early morning, as this is when the pests are most active and more likely to come into contact with the pesticide.

By combining these methods, farmers can effectively manage the pest population and minimize crop losses. Regular monitoring of the fields is also crucial to detect early signs of infestation and take timely action.

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Shenzhen Jie Zhong Lian Investment Co., Ltd. , https://www.szmeizon.com

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