品北农林升枚大学 NORTHWEST A&F UNIV国Rsr型 Oat bird-cherry aphid has either an anholocyclic life cycle in mid-southern China or a heteroecious holocyclic life cycle in northern China.Eggs overwinter on fruit trees. 888880
Oat bird-cherry aphid has either an anholocyclic life cycle in mid-southern China or a heteroecious holocyclic life cycle in northern China. Eggs overwinter on fruit trees
西北农林升枚大学 NORTHWEST A&F U时VERSITY ◆ Greenbug causes severe damage during wheat seedling stage;English grain aphid,after earring; Oat bird-cherry aphid can be found at all wheat stages. 88880
Greenbug causes severe damage during wheat seedling stage; English grain aphid, after earring; Oat bird-cherry aphid can be found at all wheat stages.
品北农林升枚大学 NORTHW国图T A&F UNIV到RsIT型 5.Behavior English grain aphid favors sunlight and feeds on faces of upper leaves,especially wheat ears.Most destructive damage seen after wheat heading. 888880
• English grain aphid favors sunlight and feeds on faces of upper leaves, especially wheat ears. Most destructive damage seen after wheat heading. 5. Behavior
西北农林升杖大学 NORTHWEST A&F UNIVERSITY Greenbug prefers drought and fears sunlight. Most individuals found on middle leaf backside of wheat plants. Oat bird-cherry aphid likes moisture and fears sunlight.Most seen on sheathes,backsides of leaves and root-stems near ground. 88880
• Greenbug prefers drought and fears sunlight. Most individuals found on middle leaf backside of wheat plants. • Oat bird-cherry aphid likes moisture and fears sunlight. Most seen on sheathes, backsides of leaves and root-stems near ground
品北农林升故大学 6.Factors Affecting Population 1)Climate Conditions Mid-temperature (15-25C)and low- humidity (RH 40~80%)is the most suitable for wheat aphids. 2)Crop layout 3)Natural Enemies 888880
6. Factors Affecting Population 1) Climate Conditions Mid-temperature (15-25 @) and lowhumidity (RH 40 Ｅ80 ♂) is the most suitable for wheat aphids. 2) Crop layout 3) Natural Enemies