2.Generations and Life Cycle Most agricultural pest mites have 3-10 or more than 20 generations/year;20-40 days/generation; Generally,overwinter as female adults under withered sticks and leaves or in weeds,winter crops and soil;a few overwinter as male adults or young mites
Most agricultural pest mites have 3 Most agricultural pest mites have 3-10 or more than 20 generations/year; 20 more than 20 generations/year; 20-40 days/generation; days/generation; Generally, Generally, overwinter overwinter as female adults as female adults under withered sticks and leaves or in under withered sticks and leaves or in weeds, winter crops and soil; a few weeds, winter crops and soil; a few overwinter overwinter as male adults or young mites as male adults or young mites 2. Generations and Life Cycle 2. Generations and Life Cycle
3.Feeding Types Phytophagous ■Predators 长须螨 ■Parasitoids Saprophagous ■Fungi-phagous 肉食螨
Phytophagous Phytophagous Predators Predators Parasitoids Parasitoids Saprophagous Fungi-phagous phagous 3. Feeding Types 3. Feeding Types 肉食螨 长须螨
4.Damage Characteristics Suck sap of leaves,twigs and tender stems, producing yellow and white spots on plants. Plants wither to death when sucking is severe. ●Cause malformation; o Transmit plant viruses; Pollute agricultural products and induce tetter (皮疹)
z Suck sap of leaves, twigs and tender stems, Suck sap of leaves, twigs and tender stems, producing yellow and white spots on plants. producing yellow and white spots on plants. Plants wither to death when sucking is severe. Plants wither to death when sucking is severe. z Cause malformation; Cause malformation; z Transmit plant viruses; Transmit plant viruses; z Pollute agricultural products and induce Pollute agricultural products and induce tetter (皮疹). 4. Damage Characteristics 4. Damage Characteristics
咖啡小爪螨成虫 卵 为害状 茶谢线螨成虫
