| | 1 | Author
| G. S. Dogra, G. M. Ulrich, H. Rembold | Requires cookie* | | | Title
| A Comparative Study of the Endocrine System of the Honey Bee Larvae under Normal and Experimental Conditions  | | | | Abstract
| The endocrine system of the honey bee (Apis mellifera L.) has been studied morphologically through post-embryonic development with several histological techniques. Marked differences in the structure of the neurosecretory complex of queen and worker larvae have been observed during larval stages. In queen larvae, morphogenesis of the neurosecretory cells, their axons and the formation of the chiasma takes place during end of 2nd and beginning of 3rd, in the workers at beginning of 4th larval instar. Stainable neurosecretory material was found in queen larvae at the beginning, in worker larvae at the end of 4th instar. In early larval stages, the corpora allata are more active in the queen. During initial 3 — 5 days of larval development the gland volume is reduced in both castes. After 36 to 48 hours of endocrine retardation, the glands become active again. The same histological effects are found under experimental conditions, where worker larvae of 2nd instar were reared in the incubator on basic food, Royal Jelly and with topically applied juvenile hormone I. | | | |
Reference
| (Z. Naturforsch. 32c, 637 [1977]; received February 9 1976/April 4 1977) | | | |
Published
| 1977 | | | |
Keywords
| Insect, Endocrinology, Honey Bee, Caste Determination, Juvenile Hormone | | | |
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| | | | | TEI-XML for
| default:Reihe_C/32/ZNC-1977-32c-0637.pdf | | | | Identifier
| ZNC-1977-32c-0637 | | | | Volume
| 32 | |
| 3 | Author
| Heinz Rembold, Christian Czoppelt, GireeshK. Sharma | Requires cookie* | | | Title
| Precocene II is no Anti-Juvenile Hormone in the Honey Bee, Apis mellifera | | | | Abstract
| The effect o f precocene II on development o f the honey bee, Apis mellifera, was studied in vitro. One-to two-day-old worker larvae (body weight 0.5 — 1.0 mg) were removed from the colonies, reared on royal jelly-yeast extract, and after 24 h were topically applied with different amounts (5 -75 |ig/larva) of precocene II. Toxicity was observed only with precocene doses o f 50 (ag/larva and more. The larval weight-gains declined with the increase o f doses. The acetone-treated control had better survival and weight-gain as compared to the no-treatment control. The larval and pu pal periods in the treated larvae remained unchanged as compared to the controls. The possibility of precocene acting as an antifeedant is discussed. | | | |
Reference
| Z. Naturforsch. 34c, 1261—1263 (1979); received July 31 1979 | | | |
Published
| 1979 | | | |
Keywords
| Precocene II, Anti-Juvenile Hormone, Honey Bee, Apis mellifera, Anti-Feedant | | | |
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| default:Reihe_C/34/ZNC-1979-34c-1261.pdf | | | | Identifier
| ZNC-1979-34c-1261 | | | | Volume
| 34 | |
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