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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Biology, importance and control of Pemphigus bursarius (L.) on lettuce, with notes on related gall-forming species.

Alleyne, Eslie Herman. January 1975 (has links)
No description available.
2

Biology, importance and control of Pemphigus bursarius (L.) on lettuce, with notes on related gall-forming species.

Alleyne, Eslie Herman January 1975 (has links)
No description available.
3

A review of Sitobion, with a description and revision of a new genus (Homoptera: Aphididae)

Jensen, Andrew S. 07 May 1996 (has links)
Graduation date: 1996
4

Morfometría de especies de Aphididae (Hemiptera) procedentes de Cieneguilla (Lima-Perú)

Torres Carrasco, Sara Virginia Olinda January 2015 (has links)
Se estudiaron dos poblaciones diferentes de áfidos en el distrito de Cieneguilla específicamente para la zona de Sierra Morena y Villa Toledo con un total de 282 ejemplares de áfidos: 13 alados, 254 ápteros y 15 ninfas. Reportando 11 nuevas especies de áfidos dentro de 12 hospederos de importancia agrícola, medicinal y económica. Estas especies fueron: Aphis craccivora (Koch, 1854), Aphis fabae (Scopoli, 1763), Aphis gossypii (Glover, 1877), Aphis spiraecola (Patch, 1914), Brachycaudus helichrysi (Kaltenbach, 1843), Macrosiphoniella sanborni (Gillette, 1908), Macrosiphum euphorbiae (Thomas, 1878), Myzus hemerocallis (Takahashi, 1921), Rhopalosiphum maidis (Fitch, 1856), Rhopalosiphum padi (Linnaeus, 1758), Toxoptera aurantii (Boyer de Fonscolombe, 1841) para la zona de Sierra Morena y Aphis craccivora (Koch, 1854), Aphis gossypii (Glover, 1877), Aphis spiraecola (Patch, 1914), Brachycaudus helichrysi (Kaltenbach, 1843), Myzus hemerocallis (Takahashi, 1921) para la zona de Villa Toledo. Por primera vez se realizaron mediciones indicando 13 variables diferentes encontrando a Macrosiphum euphorbiae (Thomas, 1878) como la especie que presenta mayor tamaño y Rhopalosiphum maidis (Fitch, 1856) la especie más pequeña. Two different populations of aphids were studied in the distric of Cieneguilla, especially in the area of Sierra Morena and Villa Toledo; this lead to a total of 282 of aphids: 13 winged 254 wingless and 15 nymphs. 11 new aphid species were reported within 12 hosts of agricultural, medical and economic importance. These species were: Aphis craccivora (Koch, 1854), Aphis fabae (Scopoli, 1763), Aphis gossypii (Glover, 1877), Aphis spiraecola (Patch, 1914), Brachycaudus helichrysi (Kaltenbach, 1843), Macrosiphoniella sanborni (Gillette, 1908 ), Macrosiphum euphorbiae (Thomas, 1878), Myzus hemerocallis (Takahashi, 1921), Rhopalosiphum maidis (Fitch, 1856), Rhopalosiphum padi (Linnaeus, 1758), Toxoptera aurantii (Boyer de Fonscolombe, 1841) for the area of Sierra Morena and Aphis craccivora (Koch, 1854), Aphis gossypii (Glover, 1877), Aphis spiraecola (Patch, 1914), Brachycaudus helichrysi (Kaltenbach, 1843), Myzus hemerocallis (Takahashi, 1921) for the area of Villa Toledo. Measurements were conducted for the first time where 13 different variables were stated and a Macrosiphum euphorbiae (Thomas, 1878) was found as the largest specie and Rhopalosiphum maidis (Fitch, 1856) as the smallest.
5

Genetic selection, evaluation and management of nondiapause Aphidoletes aphidimyza (Rondani) (Diptera : Cecidomyiidae) for control of greenhouse aphids in winter

Gilkeson, Linda A. January 1986 (has links)
No description available.
6

Genetic selection, evaluation and management of nondiapause Aphidoletes aphidimyza (Rondani) (Diptera : Cecidomyiidae) for control of greenhouse aphids in winter

Gilkeson, Linda A. January 1986 (has links)
No description available.
7

Polymorphism in aphids, with particular reference to the influence of the hostplant on the development of alate and apterous forms in Aphis craccivora Koch (Homoptera : Aphididae)

Birks, P. R. January 1959 (has links) (PDF)
Typewritten copy Includes bibliographical references
8

Experimental studies on occurrence of cereal aphids and resulting damage to small grain crops in southwestern Quebec.

Ba-Angood, Saeed Abdulla. January 1980 (has links)
Cereal aphids started to infest cereals in the first week of June and reached their peak in the second and third week of July. They could affect both the quantity and quality of grain yields, but I recommend chemical control only when the aphid population reaches the economic threshold level, which was calculated as 16 aphids/tiller. Pirimicarb is recommended for chemical control, as it controlled aphids efficiently and had a minimal effect on the available predators and parasites. A sequential sampling plan has been developed to detect if populations reach economic threshold. Temperature accumulation, starting from the first detection of aphids on the crop, allowed prediction of the time of peak population on the crop.
9

Experimental studies on occurrence of cereal aphids and resulting damage to small grain crops in southwestern Quebec.

Ba-Angood, Saeed Abdulla. January 1980 (has links)
No description available.
10

Effects of Aphis craccivora Koch on the metabolism of Vigna sesquipedalis Fruw

吳日晶, Wu, Alice. January 1974 (has links)
published_or_final_version / Botany / Master / Master of Science

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