Egg morphology and stages of embryonic development of the glassy-winged sharpshooter (Hemiptera: Cicadellidae)

Ali K. Al-Wahaibi, Joseph G. Morse

نتاج البحث: المساهمة في مجلةArticleمراجعة النظراء

11 اقتباسات (Scopus)

ملخص

The structure of the egg and embryonic developmental stages of glassy-winged sharpshooter, Homalodisca vitripernnis (Germar) (Hemiptera: Cicadellidae), an important vector of Xylella fastidiosa are described and illustrated. This sharpshooter has narrow, flattened elliptical eggs with the anterior end less broad and more pointed than the posterior end. The anterior portion of the egg contains a keel-shaped structure with a ridge that stretches backward for a short distance and then transforms into a groove stretching longitudinally along the ventral surface of the egg. The eggshell apparently has two layers: an outer shell layer that peels off easily when handling the egg, and an inner layer that appears intact, tighdy surrounding the yolk and other liquid contents of the egg. There were six discernible stages of embryonic development (195 h at 25°C) : an initial undifferentiated stage at 0-90 h, appearance of the head cap at 90-100 h, eye spot migration at 100-130 h, active physiological stage at 130-180 h, a head cap ballooning stage at 180-190 h, and emergence of the first-instar nymph at 185-195 h. It was found that the general structure of the egg and embryonic developmental stages are similar to that of odier cicadellids. However, the present work breaks down the embryonic development of leafhopper eggs into more stages dian previously described. The timing of H vitripernnis embryonic developmental stages could be used to improve the design of host-age effect experiments aimed at developing more efficient rearing mediods for egg parasitoids to be released for control of H. vitripernnis.

اللغة الأصليةEnglish
الصفحات (من إلى)241-248
عدد الصفحات8
دوريةAnnals of the Entomological Society of America
مستوى الصوت102
رقم الإصدار2
المعرِّفات الرقمية للأشياء
حالة النشرPublished - مارس 2009

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