摘要:

AbstractUsing total egg production corrected for size of blood meal as an index of the activity of the corpus allatum (CA), the effects of various surgical manipulations of the neuroendocrine system have been examined. Isolation of the CA from its nervous connections increases egg production well beyond that of a normal insect, thus confirming that the CA is at least partly controlled by inhibitory nerves from the brain. Removal of the corpora cardiaca (CC) reduces the level of this increased egg production, and decapitation anterior to the CC results in a level of egg production that is greater than that found in females decapitated between the CA and CC. Implanting a CC together with a CA into a decapitated female results in a higher egg production than implanting a CA alone. These results demonstrate that an allatotropic influence is exerted by the CC. Experiments designed to examine the role of the brain were inconclusive and did not eliminate the possibility that the allatotropin from the CC originated in the brain.

ISSN:0739-4462    

DOI:10.1002/arch.940040402

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

摘要:

AbstractNonmelanized cuticle development was induced in workers ofSolenopsis invictaby feeding them an insect‐free diet. The nonmelanized workers weighed less and had smaller mean headwidths than workers from normal colonies. Although nonmelanized ant colonies appeared to function normally in the laboratory, their attempts at stinging were felt only as “pin pricks.” Chemical analysis of venom alkaloids and cuticular hydrocarbons indicated no qualitative differences between nonmelanized and normal workers. Tyrosine, an essential amino acid tanning precursor, was found in adequate quantities in the free amino acid pool of nonmelanized ants. The specific cause of the nonmelanized condition is not

ISSN:0739-4462    

DOI:10.1002/arch.940040403

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

摘要:

AbstractPrimary alcohols varying in chain length from C13to C16, and in number, position, and geometric configuration of double bonds, were applied in dimethyl sulfoxide to the surface of the female sex pheromone glands ofHeliothis subflexa(Gn.) andHydraecia micacea(Esper). Capillary gas chromatographic analysis of extracts of the treated glands indicated that the alcohols were converted to the corresponding aldehydes byH. subflexafemales and to the acetates byH. micaceafemales. Conversions of the alcohols showed no preferences for molecular weight, number, position, or geometry of the double bonds in either species. Application of the acetates of the primary alcohols to the gland surface ofH. subflexafemales resulted in the production of both the corresponding alcohols and aldehydes, while neither alcohols nor aldheydes were produced when acetates were applied to the glands ofH. micacea. In addition, application of the acetates to the gland surface ofHeliothis virescens(F.) resulted in the production of both the corresponding alcohols and aldehydes. However, no evidence was found to indicate that acetates are ever produced by the pheromone gland of females ofH. virescens.

ISSN:0739-4462    

DOI:10.1002/arch.940040404

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

摘要:

AbstractA rapid and efficient procedure has been developed for the purification of α‐glycerophosphate dehydrogenase from the tephritid flyAnastrepha suspensa. This procedure is applicable to the isolation of the enzyme from other tephritids. TheA. suspensaα‐glycerophosphate dehydrogenase is dimeric with a molecular weight of 70,000 and a subunit molecular weight of 35,000. The pH optimum of the enzyme is 7.0. The amino acid composition is compared with that of other α‐glycerophosphate dehydrogenases. By means of the quantitative microcomplement fixation procedure theA. suspensaα‐glycerophosphate dehydrogenase is compared immunologically to a variety of other tephritid and dipteran α‐glycerophosphate

ISSN:0739-4462    

DOI:10.1002/arch.940040405

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

摘要:

AbstractThe thickness and total protein content of the ventral abdominal cuticle of the female tsetse,Glossina austeni, increase during the early part of each pregnancy cycle, reaching a maximum at approximately 2 days after ovulation. They decrease thereafter, and reach a minimum value just before larviposition. Virgin females do not exhibit a cycle of protein content or thickness in the cuticle. Preliminary data on the incorporation of [3H]tyrosine or [3H]leucine into the water‐soluble proteins of the ventral abdominal cuticle at the time of the second larviposition suggest that there is rapid turnover of protein in the cuticle at this time. These observations are consistent with the net storage of protein in the cuticle during the early part of pregnancy cycle followed by a net depletion of that store as the nutritional demands of the rapidly growing larva in utero exceed the capacity of the ingested blood meals to supply the

ISSN:0739-4462    

DOI:10.1002/arch.940040406

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

摘要:

AbstractVitellin was isolated from mature eggs ofDacus oleae. A combination of anion‐exchange chromatography and gel filtration was used for purification of the protein. The molecular weight of isolated vitellin, as determined by Sephacryl S‐300 chromatography, was approximately 300,000. Electrophoresis on SDS‐polyacrylamide gels demonstrated the presence of vitellin subunits with molecular weight of 47,000 and 49,000. Isoelectric focusing on polyacrylamide gels revealed a series of polypeptides with isoelectric points covering an acidic pH region of 5.7 to 6.2. Immunodiffusion, immunoelectrophoresis, and immunoblotting were used for further characterization of vit

ISSN:0739-4462    

DOI:10.1002/arch.940040407

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

摘要:

AbstractPenetration of insecticides through the integument of adult and nymph V ofTriatoma infestanswas examined. Intersegmental membranes and the union between dorsal and ventral cuticle appear to be preferential portals of entry of [14C]parathion in adult insects. In both possible entry points, cuticle has a higher proportion of endocuticle over exocuticle, in comparison to other areas of the integument. In nymph V the whole integument seems to be the entry point for [14C]parathion, which correlates with its cuticle being almost completely composed of endocuticle. The percent penetration of [14C]parathion was almost double in nymph V compared with adult insects.The effect of carriers on [14C]malathion penetration was that they modified the penetration rate and the mode of entry. Differences in the surface distribution of carriers with and without malathion were established.

ISSN:0739-4462    

DOI:10.1002/arch.940040408

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

ISSN:0739-4462    

DOI:10.1002/arch.940040409

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY

ISSN:0739-4462    

DOI:10.1002/arch.940040401

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1987

数据来源: WILEY