Biocontrol. Control of pests 1- Natural control Natural enemies Temperature, moisture and winds. Intraspeceific competitions. Nutrition ( quantity and.

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Presentation transcript:

Biocontrol

Control of pests 1- Natural control Natural enemies Temperature, moisture and winds. Intraspeceific competitions. Nutrition ( quantity and quality)

2- Applied control Cultural control ( Irrigation,crop free period, crop rotation, planting and harvesting dates, fertilization, weed control, destruction of crop residues). Physical and mechanical control ( hand picking, barriers, sound, light traps, temperature). Biological control (predation, parasitism)

الشروط الواجب توافرها لضمان نجاح المكافحة الحيوية حمايتها من المبيدات الحشرية و ذلك بتقليل استخدام المبيدات الى اقل ما يمكن ايجاد اعداء حيوية مقاومة لفعل المبيدات

الشروط الواجب توافرها لضمان نجاح المكافحة الميكروبية ان تكون ذات فاعلية عالية ان تكون متخصصة يمكن انتاجها بسهولة يمكن الاحتفاظ بها وتخزينها لوقت الحاجة سهولة تحضيرها توفر الالات اللازمة لاستخدامها

يمكن استعمال الكائنات الدقيقة في مجال المكافحة بثلاث طرق الاستغلال الامثل للكائنات الدقيقة الموجودة في الطبيعة ادخال الكائنات الدقيقة الممرضة كعامل دائم ادخال الكائنات الدقيقة على فترات على هيئة مبيدات ميكروبية

Legal control Chemical control( fungicides, insecticides. Herbicides,nematocides, rodenticides, molluscicides)

Mode of action of insecticides Physical poisons ( prevent oxygen or cuticle damage) Protoplasmic poisons ( damage of epithelial cells in insects) metabolic inhibitors :- - Respiratory poisons ( hydrogen cyanide) - Inhibitors ( function of oxidase enzymes) - Inhibitors of carbohydrate metabolism ( sodium fluracetate and sodium flouride)

Nreve poison ( cholinestrase inhibitors, nerve receptor) Repellant