powerpoint presentation · 2019. 2. 2. · powerpoint presentation author: user created date:...
TRANSCRIPT
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وقن343الحشرات االقتصادية
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The hierarchical nature and processes of
different levels of ecological systems:
الكائن
العشيرة
المجتمعيالنظام البيئ
يالمحيط الحيو
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معلومات عامة
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معلومات عامة
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ماذا تأكل الحشرات
النباتات
دم اإلنسان والحيوانات
البذور
األوراق
واالخشابعلى الرحيق والسوائلعلى الحشرات والحيوانات
الثمار والمواد الغذائية
المخزونة
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أكالت النبات
فقدان األنسجة
ورانخفاض إنتاج البذ
اتانخفاض حيوية النب
اإلصابة باألمراض
الغذاء
النمو
المكان المناسب
التغذية على النباتات–أضرار الحشرات
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أحادية العائلقليلة العوائل متعددة العوائل
أضرار الحشرات
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أضرار الحشرات
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Hostالعائل
الناقلVector المسببPathogen
المحيط Environment
روسات الفي-البكتريا –الفطريات بعض الحشرات
اناإلنس-الحيوان–النبات مثلث المرض
نقل مسببات األمراض-أضرار الحشرات
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تعريف الناقل
مميزات الناقل الجيد
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مميزات الناقل الجيد
(عدد مرات التغذية)معدل التغذية (قلالتي يزورها النا( العوائل–عدد النباتات )معدل الحركة
الكثافة العددية
مقاومة الناقل للمبيدات الحشرية
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إفراز الندوة العسلية–أضرار الحشرات
لمن سائل سكري لزج تفرزه بعض الحشرات مثل حشرات ا: الندوة العسلية
والذبابة البيضاء وغيرهما
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لماذا تفرز هذه الحشرات الندوة العسلية
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لماذا تفرز هذه الحشرات الندوة العسلية
ا كمية ألنها تحتاج إلى غذاء غني بالبروتين وعصارة النبات ال يتوفر به
ن البروتين الالزمة للحشرة، ولهذا تتغذى الحشرة على كميات كبيرة م
ح المواد العصارة النباتية لتستخلص على كمية البروتين المطلوب، وتطر
السكرية الزائدة خارج الجسم
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أضرار إفراز الندوة العسلية
استنزاف عصارة النبات
تراكم الغبار وانسداد الثغور التنفسية وفتحات النتح
انخفاض عملية التمثيل الضوئي
نمو العفن األسود
ليةانجذاب حشرات النمل والتي تدافع عن مفرزات الندوة العس
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Sooty mold