Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Colin A. M. Campbell"'
Autor:
Colin A. M. Campbell
Publikováno v:
Agricultural and Forest Entomology. 21:209-218
Publikováno v:
Physiological Entomology. 42:389-396
The attraction range of olfactory response by winged female gynoparae (autumn migrants that give birth to oviparae, the sexual females) and male damson–hop aphids Phorodon humuli (Schrank) is investigated in field experiments over 2 years by analyz
Publikováno v:
Entomologia Experimentalis et Applicata. 122:265-269
After an absence of 50 years, the currant pug moth, Eupithecia assimilata Doubleday (Lepidoptera: Geometridae), has reappeared as an important pest of hops, Humulus lupulus L. (Cannabaceae), in the UK. Pheromone gland extracts from virgin female E. a
Autor:
Emma L. Tregidga, Colin A. M. Campbell
Publikováno v:
Physiological Entomology. 31:394-397
The induction of sexual and parthenogenetic morphs of the damson-hop aphid, Phorodon humuli, on hops is controlled by daylength. The ability of P. humuli, to produce winged pre-sexual females (gynoparae) in the short-day conditions of spring is inhib
Autor:
Colin A. M. Campbell, Emma L. Tregidga
Publikováno v:
Physiological Entomology. 30:189-194
Sexual morph production in Phorodon humuli is controlled by daylength. Wingless aphids reared from birth in short-day conditions (LD 12 : 12 h) and transferred when adult to long-day conditions (LD 18 : 6 h) produce only gynoparae and males until dea
Publikováno v:
Annals of Applied Biology. 143:35-44
Summary Soil-applied imidacloprid at full (125 g a.i. ha−1) and half approved doses gave levels of control of damson-hop aphid, (Phorodon humuli), similar to that provided by foliar spray(s) of tebufenpyrad on the aphid-susceptible dwarf hop cvs Fi
Publikováno v:
Biocontrol Science and Technology. 13:275-284
Two female Phytoseiulus persimilis and their offspring eliminated two-spotted spider mite Tetranychus urticae from hop leaf discs faster than two female Neoseiulus californicus and their offspring at 25°C. A combination of one female of each species
Autor:
Martin S. Ridout, Colin A. M. Campbell
Publikováno v:
Entomologia Experimentalis et Applicata. 99:211-216
The pattern of colonisation of dwarf hops (Humulus lupulus) by damson-hop aphid (Phorodon humuli (Schrank)) migrating from Prunus spp. was investigated at six plant spacings and where some of the hops were replaced by oilseed rape (Brassica napus L.)
Autor:
Colin A. M. Campbell, Richard Lilley
Publikováno v:
Biocontrol Science and Technology. 9:453-465
Single inoculative releases of the phytoseiid mite Phytoseiulus persimilis were made against the two-spotted spider mite, Tetranychus urticae, on two varieties of dwarf hops in 1996 and 1997 at means of 20, 10, 5, 2.5 and nil per plant, and at up to
Autor:
Colin A. M. Campbell, Richard Lilley
Publikováno v:
Biocontrol Science and Technology. 9:467-473
Chemical, biological and integrated programmes for the control of two-spotted spider mite, Tetranychus urticae, were compared on dwarf hops in 1997 and 1998. In both years integrated control, which consisted of an application of the ovicidal acaricid