Hedgerows surrounding organic apple orchards in north-west Spain: potential to conserve beneficial insects

2013 ◽  
Vol 15 (4) ◽  
pp. 382-390 ◽  
Author(s):  
Marcos Miñarro ◽  
Eduardo Prida

2008 ◽  
Vol 61 ◽  
pp. 328-332 ◽  
Author(s):  
D.R. Wallis ◽  
P.W. Shaw

Field experiments to evaluate four different coloured sticky traps for monitoring beneficial insects were conducted on Braeburn apple blocks in four commercial orchards situated in the Motueka region Traps used were white yellow and blue Corflute sheets and a clear Mylar sheet all coated on one side with adhesive (Tactrap) The sticky traps were deployed between 27 February and 24 March 2006 Each colour sticky trap was hung vertically from a branch within the tree and traps were replaced and rerandomised two times during the trapping period Beneficial insects monitored included Aphelinus mali Platygaster demades Anagrus sp Stethorus bifidus and Encarsia spp Results indicated that yellow was the best trap colour for catching A mali Stethorus and Encarsia and a clear trap was best for Anagrus sp Trap colour did not have a significant impact on the catch of P demades



1967 ◽  
Vol 99 (7) ◽  
pp. 689-696 ◽  
Author(s):  
K. H. Sanford ◽  
H. J. Herbert

AbstractOvex, tetradifon, and chlorbenside which are largely innocuous, and parathion which is more harmful, to beneficial insects and predaceous mites, have been used in apple orchards in Nova Scotia to control outbreaks of phytophagous mites. Dicofol is used at present but it is toxic to predaceous mites. Animert V-101 is effective against Panonychus ulmi (Koch) but is ineffective on most beneficial species. Dicofol and Animert V-101 initially reduced a high population of P. ulmi but were equally ineffective on predaceous insects. The latter chemical was innocuous to Typhlodromus pyri Scheuten and Vasates schlechtendali (Nal.) but gave partial control of P. ulmi. A similar high population of P. ulmi was reduced to a low level on a comparative untreated plot where a high number of predators was present. This reduction was evident 1 month later than on the treated plots. The overwintering numbers of P. ulmi in 1966 were below a commercially tolerable level on the three plots.



Author(s):  
S. Shirahama ◽  
G. C. Engle ◽  
R. M. Dutcher

A transplantable carcinoma was established in North West Sprague Dawley (NWSD) rats by use of X-irradiation by Engle and Spencer. The tumor was passaged through 63 generations over a period of 32 months. The original tumor, an adenocarcinoma, changed into an undifferentiated carcinoma following the 19th transplant. The tumor grew well in NWSD rats of either sex at various ages. It was invariably fatal, causing death of the host within 15 to 35 days following transplantation.Tumor, thymus, spleen, and plasma from 7 rats receiving transplants of tumor at 3 to 9 weeks of age were examined with an electron microscope at intervals of 8, 15, 22 and 30 days after transplantation. Four normal control rats of the same age were also examined. The tissues were fixed in glutaraldehyde, postfixed in osmium tetroxide and embedded in Epon. The plasma was separated from heparanized blood and processed as previously described for the tissue specimens. Sections were stained with uranyl acetate followed by lead citrate and examined with an RCA EMU-3G electron microscope.



Author(s):  
Daryl A. Cornish ◽  
George L. Smit

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.



1996 ◽  
Vol 26 (12) ◽  
pp. 1364-1370 ◽  
Author(s):  
R. S. H. Pumphrey ◽  
S. J. Stanworth
Keyword(s):  




2014 ◽  
Author(s):  
Roald Amundsen ◽  
Godfred Hansen
Keyword(s):  


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