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Date: 28-4-2020
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Date: 28-4-2020
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Date: 28-4-2020
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Hundreds of pheromones are known with which one sex (usually the female) of an insect species attracts its mates. Many of these sex attractants or their close chemical relatives are available commercially. They have proved useful weapons against insect pests in two ways:
Figure 1.1 Gypsy moth
The photo (courtesy of USDA) shows the feathery antennae of a male gypsy moth. These detect the pheromone released by the females (who do not fly). In some insects, a single molecule of sex attractant is enough to elicit a response.
Sexual Deception
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15 نوعا من الأطعمة تساعدك على ترطيب جسمك خلال موجة الحر
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دول عربية تقرر قطع الكهرباء لساعات محددة يوميا بسبب الحرارة
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بالصور: بمناسبة عيد الغدير الاغر.. قراءة خطبة النبي الأكرم (ص وآله) بالمسلمين في يوم (غدير خم)
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