粘 虫 小地老虎成虫 甜菜夜蛾 稻纵卷叶螟 稻褐飞虱 白飞
粘 虫 稻纵卷叶螟 稻褐飞虱 白背飞虱 甜菜夜蛾
General Biology of Migratory Pest Insects
General Biology of General Biology of Migratory Pest Insects Migratory Pest Insects
1.Characteristics of Migratory Activity Migratory process is an instinctive habit. *Emigration flying occurs at special times Daytime pests flying during day; Nighttime emigration:moths; Dust emigration:brown rice planthopper Nilaparvata lugens. Directional flying in swarms
Migratory process is an instinctive habit. Emigration flying occurs at special times Daytime : pests flying during day; Nighttime emigration: moths; Dust emigration: brown rice planthopper Nilaparvata lugens. Directional flying in swarms 1. Characteristics of Migratory Activity Characteristics of Migratory Activity
2.Development and Reproduction Migratory flying is synchronous with development of adults.Especially has a close relationship with female development. Migratory flight occurs before female reproduction.Ovaries stop developing during flight.Eggs are laid after landing. Mating can happen before flight,during flight or after flight
Migratory flying is synchronous with development of adults. Especially has a close relationship with female development. Migratory flight occurs before female reproduction. Ovaries stop developing during flight. Eggs are laid after landing. Mating can happen before flight, during flight or after flight. 2. Development and Reproduction Development and Reproduction
3.Energy Consumed for Flight Generally,flies or mosquitoes (Diptera) and wasps (Hymenoptera) consume mainly carbohydrates as energy for flight. Migratory pests consume fats to maintain flight for a long time
Generally, flies or mosquitoes (Diptera) and wasps (Hymenoptera) consume mainly carbohydrates as energy for flight. Migratory pests consume fats to maintain flight for a long time. 3. Energy Consumed for Flight Energy Consumed for Flight