西北农林科技大学：《农业昆虫学》课程教学课件（英文版，2012）Chapter 3 Ground Pest Insects

Chapter 3 GROUND PEST INSECTS Wu Junxiang T Li Yiping Junxw@nwsuaf.edu.cn yp2003@126.com

Chapter 3 GROUND PEST INSECTS GROUND PEST INSECTS Wu Junxiang Junxiang & Li Yiping Junxw@nwsuaf.edu.cn lyp2003@126.com

Chapter 3 Ground Pest Insects Lecture Outline Overview White grubs > Elaterids Mole crickets >Other common ground pests Factors related to population Survey and management

Lecture Outline ¾ Overview ¾ White grubs ¾ Elaterids ¾ Mole crickets ¾ Other common ground pests ¾ Factors related to population ¾ Survey and management Chapter 3 Ground Pest Insects

Overview 1.Categories Over 320 species being in 8 orders,38 families recorded in China.Including grubs, elaterids,mole crickets,cutworms,root- maggots,root-aphids,root-bugs,root- weevils,root-borers,root-chrysomelids, root-longicorns root-scale,termites, crickets,spring tails,root mites

3 1. Categories Over 320 species being in 8 orders, 38 families recorded in China. Including grubs, elaterids, mole crickets, cutworms, root￾maggots, root-aphids, root-bugs, root￾weevils, root-borers, root-chrysomelids, root-longicorns、root-scale, termites, crickets, spring tails, root mites. Overview

Overview 1.Categories grubs,elaterids,mole crickets and cutworms are the most common categories found everywhere because of abundant individuals

4 1. Categories grubs, elaterids, mole crickets and cutworms are the most common categories found everywhere because of abundant individuals. Overview

Overview 2.Distribution Ground pests found all over the country. More species and more severe damage in north than in south or in dry-land than in irrigable land. Most severe damage found in middle and downstream area of Yellow River

5 2. Distribution Ground pests found all over the country. More species and more severe damage in north than in south or in dry-land than in irrigable land. Most severe damage found in middle and downstream area of Yellow River. Overview

Overview 3.Characteristics 1)Abundant species; 2)Wide range of host plants.Most species are Polyphagous. 3)Long life cycle; 4)Most of the time in soil and hard to find; 5)Severe damage happens in both spring and autumn; especially in spring--causes a lot of young seedlings to die

6 3. Characteristics 1) Abundant species; 2) Wide range of host plants. Most species are Polyphagous. 3) Long life cycle; 4) Most of the time in soil and hard to find; 5) Severe damage happens in both spring and autumn; especially in spring--causes a lot of young seedlings to die. Overview

林木受害 花生受害状 玉米幼苗根郎受害状 花尘幼苗蓬部爱害状 公园苹坪受害状 缺首断垫经米幼简)

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I.WHITE GRUBS White grubs are also called grubs. Their adults are chafers in Coleoptera. White grubs are one category of the most damaging ground pests. More than 110 species are recorded in China

8 Ⅰ. WHITE GRUBS . WHITE GRUBS White grubs are also called grubs. Their adults are chafers in , Coleoptera. White grubs are one category of the most damaging ground pests. More than 110 species are recorded in China

I.WHITE GRUBS 1)Common species Holotrichia diomphalia Holotrichia parallela Anomala corpulenta

1) Common species 1) Common species Holotrichia Holotrichia diomphalia diomphalia Holotrichia Holotrichia parallela parallela Anomala Anomala corpulenta corpulenta Ⅰ. WHITE GRUBS . WHITE GRUBS

8 Holotrichia titanis Trematodes Popillia quadriguttata tenebrioides Maladera orientalis 10 12.成虫1地虫.线虫5甲叶害 图22

10 Maladera orientalis Maladera Maladera orientalis orientalis Holotrichia Holotrichia titanis titanis Trematodes Trematodes tenebrioides tenebrioides Popillia Popillia quadriguttata quadriguttata