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Auteur H. VanEmden |
Documents disponibles écrits par cet auteur (4)
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E. Wojciechowiczzutko ; H. VanEmden | 1995In a study of the performance of Aphis fabae Scop. on 6 British and 3 Polish cultivars of Vicia faba L., the aphid showed a poor mean relative growth rate (MRGR) On the Polish cultivar Hangdown Bialy (p =article/chapitre/communication
G. Gowling ; H. VanEmden | 1994Cage experiments, in which the population increase of Metopolophium dirhodum was measured either in the absence or presence of the parasitoid Aphidius rhopalosiphi, showed reductions of peak populations in the presence of the parasitoid of 30% o[...]article/chapitre/communication
H. VanEmden | 1969article/chapitre/communication
H. Hutt ; H. VanEmden ; T. Baker | 1994Similar increases in the height and aerial fresh weight of cowpeas compared with control plants were obtained when plants were sprayed with either 50 ppm a.i. (active ingredient) of the pyrethroid insecticide 'Cymbush'(R) containing cypermethrin[...]