西北农林升枚大学 ORTHWEST A&F UNIVERSIT型 Polyphagous pest:attacks a wide variety of plants. Sucking sap from their hosts:The undersides of leaves are preferred.Heavy infestations on some hosts may result in wilting.Young plants may have reduced or stunted growth. 88880
21 Polyphagous pest: attacks a wide variety of plants. Sucking sap from their hosts: The undersides of leaves are preferred. Heavy infestations on some hosts may result in wilting. Young plants may have reduced or stunted growth.
品北农林升枚大学 2.Damage NORTHWEST A&F UNIV到Rsr Produce honeydew:Copious amounts of honeydew,a sweet and watery excrement, may be produced.Honeydew serves as a medium on which sooty mold grows. Sooty mold blackens the leaf and decreases photosynthetic activity .Transfer many plant diseases:Cause substantially greater losses than damage caused by direct feeding injuries.The melon aphid is a common carrier of over 50 severe plant viruses. 888880 22
22 • Produce honeydew: Copious amounts of honeydew, a sweet and watery excrement, may be produced. Honeydew serves as a medium on which sooty mold grows. Sooty mold blackens the leaf and decreases photosynthetic activity •Transfer many plant diseases: Cause substantially greater losses than damage caused by direct feeding injuries. The melon aphid is a common carrier of over 50 severe plant viruses. 2. Damage
西北农林升枚大学 NORTHWEST A&F U时VERSITY 3.Life Cycle 1)Life cycle types(生活周期型 Heteroecious holocyclic life cycle (异寄主全周期)：Found in northern cotton growing areas.Eggs overwinter on original or first hosts such as hibiscus(木槿)，guava(石榴)， redbud(紫荆)and夏至草. 88886 23
23 1) Life cycle types (ナ9趨鸚繁 ) Heteroecious holocyclic life cycle (欸塲ε傑趨鸚) : Found in northern cotton growing areas. Eggs overwinter on original or first hosts such as hibiscus (麌㈶), guava (G⑵), redbud (ʼ杶) and 耗齧枲. 3. Life Cycle
越冬卵孵化 早春 干母 孤雌胎生一干雌 一迁移蚜 (卵胎生) (花椒、石榴、木槿) (有翅) 4 有 卵 5 生 ，× 雌 第一寄主 蚜 蚜 越冬寄主（花椒、石榴） 迁 10 11 性母 5 至6 第二寄主 7、8 夏寄主（棉花、瓜类） 蚜% 迁移蚜 侨居蚜 棉蚜异寄主全周期型生活史 88886
24 䍞弧戎 档蕫 档䲠 䖕▪㱰 ′嬥》┚G⑵┚麌㈶″ ′鶫恐″ 鶫 戎 恐 ナ 䲘 × 䲠 ゔヘ塲ε 㱰 㱰 狢 蕫 ゔы塲ε 䖕▪㱰 戒寢㱰 湮㱰欸塲ε傑趨鸚繁ナ9賞 耗塲ε′湮嬥┚いū″ 䍞弧塲ε′嬥》┚G⑵″ 陲鞐 嗽湿 單䲠半ナ ′戎半ナ″ 4嗽 5鶇 䯈 䖕 亲 5鶇ャ隘齧 6 7┚8 “荏㱰 ” 10 11
西北农林升枚大学 NORTHWEST A&F U时VERSITY 3.Life Cycle 1)Life cycle types(生活周期型 Autoecious holocyclic life cycle 寄主全周期)：hibiscus(木槿)，guava (石榴)，and redbud(紫荆)are both first hosts and secondary hosts 88:880 25
25 1) Life cycle types (ナ9趨鸚繁 ) Autoecious holocyclic life cycle (蒸塲ε傑趨鸚): hibiscus (麌㈶), guava (G⑵), and redbud (ʼ杶) are both first hosts and secondary hosts 3. Life Cycle