| Autor: |
Prakash, Harshitha, Veershetty, Channabasava, Shukla, Pawan, Subrahmanyam, Gangavarapu, Moorthy, S. Manthira |
| Předmět: |
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| Zdroj: |
International Journal of Tropical Insect Science; Oct2024, Vol. 44 Issue 5, p2381-2390, 10p |
| Abstrakt: |
Papaya mealybug Paracoccus marginatus (Williams and Granara de Willink) is an economical pest of mulberry causing significant crop loss by damaging the leaves. This study was undertaken to investigate the internal structure of papaya mealybug, that was morphologically examined through a stereo-zoom microscope which includes digestive system, respiratory system, nervous system, excretory system, pseudovitellus and muscular system. The internal anatomy of papaya mealybug revealed that the digestive system is associated with fore-gut (pharynx and oesophagus), mid-gut (stomach /dilated sac), filter chamber and hind-gut (ileum and rectum). The filter chamber is enclosed with posterior extremity of oesophagus, anterior mid-gut, posterior mid-gut, anterior extremity of ileum and rectum. Either side of the oesophageal tube has a pair of fully formed salivary gland. Two malpighian tubules approximate of its body length were seen adjacent to the hind-gut. Nervous system is mainly composed of supra-oesophageal ganglion (brain) with a small lobe called sympathetic ganglion, sub-oesophageal ganglion and thoracico-abdomial ganglion. Tracheal trunks emerge from four spiracles, which were encircled by wax glands at its base. Reproductive system consists of three globular genital glands with a single translucent globular spermatheca, a pair of ovaries arranged in Y shaped structure with numerous ovarioles. The ventral longitudinal muscles protrude from diamond shaped thoracic furca and dorsal longitudinal muscles present beneath the dorsal region extends throughout the body. An oval shaped pseudo-vitellus composed of bacterio-cysts is present in the centre of the ventral region. The purpose of this study is to highlight some of the important internal anatomical features of adult female papaya mealybug Paracoccus marginatus (Williams and Granara de Willink). [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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