Influence of Predators on Population Development of
Phorodon humuli
(Homoptera: Aphididae) on Hops

Campbell, Colin S.; Cone, Wyatt W.

doi:10.1093/ee/23.6.1391

Cited by 30 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast to results from the USA (Campbell & Cone, 1994 ), the aphid population broke down during the second half of July, and the quality of harvested cones was not affected by aphid occurrence. The seasonal decline in aphid densities may not solely be assignable to aphid antagonists, but is also influenced by intrinsic factors of aphid population dynamics (see Campbell, 1983) and aphid migration patterns (Campbell & Cone, 1994 ). However, if hop plants are free of aphids before cones are formed, the necessity for aphid control depends only on the relationship between aphid infestation levels, yield reduction and control costs.…”

Section: Discussioncontrasting

confidence: 99%

“…However, if hop plants are free of aphids before cones are formed, the necessity for aphid control depends only on the relationship between aphid infestation levels, yield reduction and control costs. We agree with Campbell & Cone (1994) that more quantification is necessary on this topic, not only for conventionally grown hops, but also under conditions of biological hop production.…”

Section: Discussionsupporting

confidence: 85%

See 1 more Smart Citation

Faba Beans as a Cover Crop in Organically Grown Hops: Influence on Aphids and Aphid Antagonists

Goller

Nunnenmacher

Goldbach

1997

Biological Agriculture & Horticulture

View full text Add to dashboard Cite

Habitat management to enhance and influence aphid antagonists was investigated as a new strategy to control aphids (Phorodon humuli Schr.) in hops (Humulus lupulus L.). As faba beans (Viciafaba L.) are regularly infested with aphids, cultivating them as a cover crop should increase numbers of aphid antagonists. Cutting the beans was intended to trigger the dispersal of predators to the hop plants. Although there were indications for such a dispersal, aphid numbers on hops were lowest in the control plot without a cover crop. At the end of July, all plots were almost free of aphids, and hop cones were never infested. Implications for pest management in hops are discussed.

show abstract

Section: Discussioncontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 85%

Faba Beans as a Cover Crop in Organically Grown Hops: Influence on Aphids and Aphid Antagonists

Goller

Nunnenmacher

Goldbach

1997

Biological Agriculture & Horticulture

View full text Add to dashboard Cite

show abstract

“…4), there were population peaks at the end of June (beginning of summer) and from mid to end of August. The population dynamics were similar to those described for the United States (Campbell & Cone 1994). The population of aphids decreases in July, when the temperature is very warm.…”

Section: Resultssupporting

confidence: 73%

Use of suction‐trap and Moericke traps for monitoring the migration of damson‐hop aphid (Phorodon humuli) (Hemiptera, Aphididae)

Pérez

Seco

Valenciano

et al. 2007

New Zealand Journal of Crop and Horticultural Science

View full text Add to dashboard Cite

Field catches of Phorodon humuli during 2 years (2000 and 2001) by means of Moericke and suction trap were compared in the province of León (north-west Spain). Positive correlations between the catches with Moericke traps and the catches with the suction trap were found. Positive correlations between the catches with the suction trap and the appearances of the first colonies on crops were also found. These results show that suction trap catches are useful for monitoring the start of spring flight of P. humuli and could serve as a guideline for application of treatments for control of this aphid.

show abstract

“…Bagged aphids cannot disperse, and microclimatic dierences are likely between bagged and unbagged buds. Several previous studies of the in¯uence of natural enemies on aphid populations tested halfcages or open bags to determine whether these eects could be distinguished, but instead found intermediate responses between those of fully enclosed and exposed aphid populations (Campbell and Cone 1994;Chambers et al 1983;Morris 1992). In other aphid species, only the foundress generation may form galls or pseudogalls on host plants (Wool and Burstein 1991); therefore, the costs of dispersal to new leaves by the parthenogenetic generations may be very high.…”

Section: Discussionmentioning

confidence: 99%

The consequences of clustering by Aphis fabae foundresses on spring migrant production

Hodgson

Godfray

1999

Oecologia

View full text Add to dashboard Cite

Aphis fabae (Homoptera: Aphididae) foundresses were shown to have a clustered distribution on leaves of their primary host, Euonymus europaeus. Two field experiments were carried out to determine the costs or benefits of this clustering behaviour to aphid clones. The first experiment, in spring 1996, excluded predators from colonies formed by single fundatrices or clusters of three. No density-dependent effects on colony growth were observed early in the season, but the total production of migrants per foundress was significantly lower for clustered foundresses. This demonstrated that there was no synergistic effect of group feeding on clonal performance. All colonies were initiated on randomly selected leaves and all grew successfully, therefore clustering was not due to a shortage of feeding sites. The second experiment, in spring 1997, tested whether natural enemies cause selection for selfish herding by the foundress generation. Colonies were initiated by one or three foundresses, but half were left unbagged. If natural enemy attack is a selective force inducing clustering behaviour in foundresses, the costs of clustering should have been reduced or negated in unbagged colonies. Colonies grown from clusters produced significantly fewer migrants per foundress, irrespective of bagging treatment. Other potential factors causing clustering behaviour are discussed.

show abstract

Influence of Predators on Population Development of Phorodon humuli (Homoptera: Aphididae) on Hops

Cited by 30 publications

References 0 publications

Faba Beans as a Cover Crop in Organically Grown Hops: Influence on Aphids and Aphid Antagonists

Faba Beans as a Cover Crop in Organically Grown Hops: Influence on Aphids and Aphid Antagonists

Use of suction‐trap and Moericke traps for monitoring the migration of damson‐hop aphid (Phorodon humuli) (Hemiptera, Aphididae)

The consequences of clustering by Aphis fabae foundresses on spring migrant production

Contact Info

Product

Resources

About