Corn stickworm control
Insect: Infestation by larvae. These pests are highly selective in their diet, particularly favoring plants from the grass family. They feed on leaf tissue, creating small notches and often completely consuming the leaves, leaving only the stems behind. The damage extends to corn ears as well, which can be bitten off after being extracted. When food becomes scarce, the larvae form swarms and migrate. Once they mature, they stop feeding altogether. Occurrence Conditions and Transmission: The armyworm thrives in warm and humid environments. The first generation typically migrates in late May to June, followed by the second generation. High temperatures and low humidity hinder their development. As a long-distance migratory pest, armyworms can travel vast distances, making them a serious threat across regions. Monitoring weather patterns and local infestations is crucial for early detection and prevention. Control Methods: (1) Chemical Control: During winter wheat harvest, to prevent larvae from moving into cornfields, 2.5% trichlorfon powder was applied around the edges of nearby corn fields, creating a 4-inch-wide treated zone to block migration. Before the third instar stage, 20% of the larvae were killed using emulsifiable concentrate at 15–45 grams per mu, mixed with 50 kg of water. Alternatively, 5% suspension concentrate could be used at 1000–1500 times dilution, or 40% dimethoate at 1500–2000 times, or 10% Da Gongchen at 2000–2500 times. These treatments proved effective in reducing larval populations. (2) Biological Control: When applied during the early larval stages, Diflubenzuron at 200 ppm showed an efficacy rate of over 94.5% in controlling armyworms. It does not harm natural predators and is safe for crops. At this concentration, it has minimal environmental impact, making it a sustainable option for integrated pest management. Effective control requires a combination of monitoring, timely intervention, and the use of both chemical and biological methods. Farmers should stay informed about local conditions and adjust their strategies accordingly to minimize crop damage and ensure long-term sustainability. Lactobacillus Gasseri,Lactobacillus Gasseri Probiotic,Lactobacillus Gasseri Products,Lactobacillus Gasseri Supplement Biodep Biotechnology Co. ,Ltd. , https://www.biodep.com