STUDIES ON SEASONAL ABUNDANCE OF WOOLLY APPLE APHID AND ITS NATURAL ENEMIES IN THE MID HILLS OF HIMACHAL PRADESH

2005 ◽  
pp. 395-398 ◽  
Author(s):  
A. Sood ◽  
P.R. Gupta
Keyword(s):  
Natural Enemies ◽  
Himachal Pradesh ◽  
Seasonal Abundance ◽  
Woolly Apple Aphid

scholarly journals Natural Enemies of Woolly Apple Aphid (Hemiptera: Aphididae) in Washington State

2012 ◽  
Vol 41 (6) ◽  
pp. 1364-1371 ◽  
Author(s):  
Lessando M. Gontijo ◽  
Stephen D. Cockfield ◽  
Elizabeth H. Beers
Keyword(s):  
Natural Enemies ◽  
Washington State ◽  
Woolly Apple Aphid

Seasonal abundance of natural enemies on bg-I and bg-II Bt cotton ecosystem

2017 ◽  
Vol 41 (2) ◽  
pp. 153
Author(s):  
A.G. Badgujar ◽  
B.B. Bhosle ◽  
B.V. Bhede ◽  
S.S. Dhurgude
Keyword(s):  
Natural Enemies ◽  
Seasonal Abundance ◽  
Bt Cotton

scholarly journals Temporal asynchrony, spatial segregation and seasonal abundance of aphids on apple trees

2017 ◽  
Vol 17 ◽  
pp. 12 ◽  
Author(s):  
D. Perdikis ◽  
D. Lykouressis ◽  
G. Mitropoulou ◽  
P. Tsiantis
Keyword(s):  
Species Composition ◽  
Natural Enemies ◽  
Aphid Species ◽  
Apple Orchard ◽  
Spatial Segregation ◽  
Seasonal Abundance ◽  
Eriosoma Lanigerum ◽  
Apple Trees ◽  
Aphis Pomi ◽  
Dysaphis Plantaginea

The species composition and seasonal abundance of aphids and their natural enemies were investigated in an apple orchard located in central Peloponnese. For that purpose shoots were collected at weekly intervals. The aphid species Aphis pomi De Geer (Hemiptera: Aphididae), Dysaphis plantaginea (Passerini) (Hemiptera: Aphididae) and Eriosoma lanigerum (Hausmann) (Hemiptera: Eriosomatidae) were recorded. In both years of the study, A. pomi developed higher populations than the other two species. The population of A. pomi was high in June and July. D. plantaginea was present in April and May, with high numbers mainly in May, whilst E. lanigerum was recorded in low numbers from May to July. The number of aphids was not found to differ significantly between samples collected from the northern and southern part of the trees. The species composition of aphid population on each sampled shoot, documented spatial segregation between A. pomi and D. plantaginea. It was proved that the eggs were more commonly laid near the buds of the central part of the twigs. The natural enemies found were predators belonging to the families of Coccinellidae, Chrysopidae, Syrphidae and Anthocoridae. Generally, their numbers were low.

scholarly journals Seasonal Abundance of Thrips, Thrips tabaci Lindeman and its Natural Enemies on Kharif Onion

2019 ◽  
Vol 8 (02) ◽  
pp. 1476-1479
Author(s):  
Deepika Yadav ◽  
S.K. Khinchi ◽  
Purushotam Sharma ◽  
Hitesh Jangir
Keyword(s):  
Natural Enemies ◽  
Thrips Tabaci ◽  
Seasonal Abundance

scholarly journals Biocontrol of pests in apples under integrated fruit production

2008 ◽  
Vol 61 ◽  
pp. 333-337 ◽  
Author(s):  
P.W. Shaw ◽  
D.R. Wallis
Keyword(s):  
Natural Enemies ◽  
Fruit Production ◽  
Aphid Parasitoid ◽  
Woolly Apple Aphid ◽  
European Red Mite ◽  
Aphelinus Mali ◽  
Integrated Fruit Production ◽  
Selective Insecticide ◽  
Orchard Pests ◽  
Insecticide Sprays

The biological control of some key orchard pests achieved within an Integrated Fruit Production (IFP) apple block was assessed Insecticide sprays were used to manipulate the numbers of natural enemies Treatments included applications of the broadspectrum insecticide carbaryl a selective insecticide programme (IFP) and a control (no insecticides) Plots treated with carbaryl became heavily infested with woolly apple aphid and European red mite However carbaryl sprays did not completely prevent lacewings ladybirds and the woolly apple aphid parasitoid Aphelinus mali subsequently moving into the plots in response to the high host populations Numbers of some natural enemies were reduced in the carbaryl treatment and the trees were damaged by mites and woolly apple aphids The selective and noinsecticide programmes did not disrupt natural enemies and pest levels in trees and fruit were similar and acceptable

Populations of Stink Bugs (Heteroptera: Pentatomidae) and their Natural Enemies in Peanuts

2008 ◽  
Vol 43 (2) ◽  
pp. 191-207 ◽  
Author(s):  
Glynn Tillman
Keyword(s):  
Natural Enemies ◽  
Developmental Stages ◽  
Seasonal Abundance ◽  
Stink Bug ◽  
Stink Bugs ◽  
Geocoris Punctipes ◽  
Oebalus Pugnax ◽  
Heteroptera Pentatomidae ◽  
Telenomus Podisi ◽  
On Farm

The objective of this on-farm study was to determine if peanuts harbor populations of stink bugs (Heteroptera: Pentatomidae) and their natural enemies in Georgia. Eight species of phytophagous stink bugs were found in peanuts over the 5-yr study. The predominant stink bug species were Nezara viridula (L.), Euschistus servus (Say), Euschistus quadrator (Rolston), and Oebalus pugnax pugnax (F.). The remaining 4 species, Acrosternum hilare (Say), Euschistus tristigmus (Say), Euschistus ictericus (L.), and Thyanta custator accerra McAtee, were found in relatively low numbers. All developmental stages of N. viridula, E. servus, E. quadrator, A. hilare, and O. p. pugnax were collected at various times in the study indicating that these 5 species of stink bugs were developing on this crop. Seasonal abundance of N. viridula and E. servus nymphs and adults provided further support that these 2 species of stink bugs developed on peanuts. At least 1 generation of N. viridula and E. servus occurred in peanuts each year, and generally some of the adults that developed on peanuts oviposited on peanuts producing another generation of nymphs in this crop. Because only adults of T. c. accerra, E. tristigmus, and E. ictericus were found in peanuts, these 3 stink bug species probably were not developing on this crop. Adult stink bugs were parasitized by the tachinid parasitoids Trichopoda pennipes (F.) and Cylindromyia spp. Stink bug eggs were parasitized by the scelionids, Trissolcus basalis (Wollaston), Trissolcus thyantae Ashmead, Trissolcus brochymenae (Ashmead), Telenomus podisi Ashmead, and Gryon obesum Masner, and an unknown encyrtid species. Geocoris punctipes (Say), Geocoris uliginosus (Say), Orius insidiosus (Say), Podisus maculiventris (Say), and Oxyopes salticus Hentz preyed on stink bugs in peanuts. Peanuts harbor populations of stink bugs and their natural enemies, and thus the role peanuts play in landscape ecology of stink bugs needs to be ascertained to better understand how to manage stink bug populations in landscapes in which peanuts are associated with other crops.

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