4.Spread and Transmission Initially spread by crawl; ■ Passive spread Spread by airflow,waterflow. Find transportation with seedlings, fruits and flowers
4. Spread and Transmission 4. Spread and Transmission Initially spread by crawl; Passive spread Spread by airflow, waterflow. Find transportation with seedlings, fruits and flowers
II.Bionomics of Mites 1.Climate Conditions High temperature type:favor20-30℃；such as Panonychus ulmi(揄全爪螨)，Tetranychus viennensis(山楂叶螨)，Panonychus citri(桔全爪螨) etc. Low temperature type:prefer8~22℃，such as Pentfaleus major(麦圆叶爪螨)，Petrobia latens(麦 岩螨)etc
Ⅱ. Bionomics of Mites . Bionomics of Mites 1. Climate Conditions 1. Climate Conditions High temperature type: favor 20 High temperature type: favor 20-30℃; such as ; such as Panonychus Panonychus ulmi (榆全爪螨), Tetranychus Tetranychus viennensis viennensis (山楂叶螨), Panonychus Panonychus citri (桔全爪螨) etc. Low temperature type: prefer 8~22 Low temperature type: prefer 8~22℃, such as , such as Pentfaleus Pentfaleus major (麦圆叶爪螨), Petrobia Petrobia latens (麦 岩螨) etc. ) etc
麦岩螨 麦园叶爪螨
麦岩螨 麦园叶爪螨
II.Bionomics of Mites 2.Host plants 3.Natural enemies 4.Insecticides
2. Host plants 2. Host plants 3. Natural enemies 3. Natural enemies 4. Insecticides 4. Insecticides Ⅱ. Bionomics of Mites . Bionomics of Mites
Cereal Crop Mites Damage to maize,sorghum and millet 1.Common Species Tetranychus truncatus(截形叶螨) > T.cinnabarinus(朱砂叶螨) Twospotted spider mite 7.urticae(二斑叶 螨) Three species are all in Acariformes 螨目)，Tetranychidae(叶螨科).They often occur at the same times and places
1. Common Species 1. Common Species ¾ Tetranychus Tetranychus truncatus truncatus (截形叶螨) ¾ T. cinnabarinus cinnabarinus (朱砂叶螨) ¾ Twospotted spider mite T. urticae urticae (二斑叶 螨) Three species are all in Three species are all in Acariformes Acariformes ( 真 螨目), Tetranychidae Tetranychidae (叶螨科). They often ). They often occur at the same times and places. occur at the same times and places. Cereal Crop Mites Cereal Crop Mites Damage to maize, sorghum and millet Damage to maize, sorghum and millet