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Aphid species
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The age-stage, two-sex life table method was used for data analysis. The results indicated that EPF treatments affected the population growth rate of the aphids by causing prolongation of the development time, decrease in survival rate, shortening of adult longevity, and decrease in reproduction. The intrinsic rate of increase (r) and the finite rate of increase (λ) reflecting combined effects of all life history parameters were the highest in the control group and the lowest in M.
12p
lyhuyenthu
31-01-2023
5
2
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The prevailing paradigm of host-parasite evolution is that arms races lead to increasing specialisation via genetic adaptation. Insect herbivores are no exception and the majority have evolved to colonise a small number of closely related host species. Remarkably, the green peach aphid, Myzus persicae, colonises plant species across 40 families and single M. persicae clonal lineages can colonise distantly related plants.
20p
vialfrednobel
29-01-2022
9
0
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The venom of two dominant species of wolf spiders, Pardosa sumatrana Thorell and Pardosa birmanica Simon, was extracted and characterized. Insecticidal potential of crude venom and selected peptide fractions (i.e. 35-kDa fraction of both spiders) was evaluated in the laboratory using Rhopalosiphum padi (Linnaeus) (Homoptera: Aphididae) as a model pest. Results of the study showed that both the crude venom and the protein fractions caused significantly higher mortality in treated aphids compared to the control.
3p
dolomite36
30-12-2021
6
0
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Cannibalism or intraspecific predation, where one species feeds on individuals of its own species, is a widespread phenomenon in most aphidophagous coccinellids. Laboratory studies were conducted on the cannibalistic behavior of various developmental stages of Coccinella septempunctata L. (Coleoptera: Coccinellidae) in the presence and absence of natural food, Acyrthosiphon pisum (Harris) (Hemiptera: Aphididae). In both the presence and absence of aphids, the eggs and 1st and 2nd instars of C.
7p
dolomite36
30-12-2021
11
0
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The aim of the present study was to investigate species diversity and distribution of Aphelinus species in an elevational gradient in the Lagodekhi Reserve (Sakartvelo - Georgia) throughout a growing season. Two species of Aphelinus Dalman, 1820 (Hymenoptera: Aphelinidae), A. humilis Mercet and A. thomsoni Graham, are recorded for the first time from Georgia and the Caucasus and two species (A. lagodekhiensis sp. nov. and A. sugonjaevi sp. nov.) are described as new to science.
11p
dolomite36
30-12-2021
16
1
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Tansy plants (Tanacetum vulgare L.) are known for their high intraspecific chemical variation, especially of volatile organic compounds (VOC) from the terpenoid compound group. Tansy chemotypes have been shown to influence plant-aphid interactions, however, to date no information is available on the response of different tansy chemotypes to simultaneous herbivory by more than one insect species.
18p
vijichea2711
28-05-2021
7
1
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During surveying and collecting of predatory ladybird beetle species in Da Lat city, we recorded that Oenopia kirbyi commonly appeared on aphid-infected plants and weeds, but until now there have been almost no detailed studies on this species. With the hope of contributing to research on the use of predatory ladybird beetles in pest control, we studied the morphological and biological characteristics of Oenopia kirbyi in Da Lat city.
9p
nguaconbaynhay10
19-02-2021
12
2
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The study was based on field samples of six aphid species collected from three fruit crops namely citrus, peach and pear. The structure and morphometric data of ultimate rostral segment (URS) were compared based on 4th nymphal instar and alate adults.
6p
nguathienthan8
20-10-2020
6
2
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The study aims at comparing the preying potential of the four predator species and to ascertain their possible contribution to the suppression of the aphid pest, with the view of their of their potential use as bioagents.
11p
nguaconbaynhay8
13-10-2020
10
1
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The SMV causing mosaic in soybean was readily transmissible through sap, seed and aphids. Sap transmission of the SMV on soybean cv. JS-335 produced characteristic symptoms such as dark green colour of leaves, mosaic and mottling symptoms, crinkling, leaf puckering of leaves. The soybean mosaic virus infected a wide range of the host plants.
5p
quenchua8
29-09-2020
8
0
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Plants have developed a variety of mechanisms to counteract aphid attacks. They activate their defences by changing the expression of specific genes. Previously we identified an activation tag mutant of Arabidopsis thaliana on which Myzus persicae population development was reduced.
10p
viminato2711
22-05-2020
14
0
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It is estimated that floral deception has evolved in at least 7500 species of angiosperms, of which two thirds are orchids. Epipactis veratrifolia (Orchidaceae) is a model system of aphid mimicry as aphidophagous hoverflies lay eggs on false brood sites on their flowers.
10p
viminato2711
22-05-2020
9
1
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Cowpea (Vigna Unguiculata L. Walp.) is one of the World’s important leguminous food crop and is commonly affected by viral disease transmitted by aphid vector in nonpersistent manner. Present study was attempted on aphid transmissible virus infecting cowpea, during 2015-16. Symptoms on experimental field and mechanical transmission were characterized by mosaic, veinal necrosis, vein clearing, vein banding, blistering, stunting, leaf deformations, chlorosis and cupping of leaves. Further, Aphid transmissible virus of cowpea has restricted host range and infected only four plant species viz.
6p
nguaconbaynhay5
11-05-2020
10
0
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The study, done on the incidence of insect pest, revealed the presence of seven species of insect pests and three species of predator during the period of study from 16 September 2016 to 15 April 2017 at various stages of the brinjal crop after transplanting in district Rewa, Madhya Pradesh. The presence of whitefly, aphid, jassid and hadda beetle were recorded from the vegetative to maturity stage of the crop, while brinjal shoot and fruit borer as the most dominating species of the pest at vegetative as well as flowering and fruiting stage of the crop.
9p
chauchaungayxua5
05-05-2020
3
1
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Infestation of the phytotoxic aphid Schizaphis graminum can rapidly induce leaf chlorosis in susceptible plants, but this effect is not observed with the nonphytotoxic aphid Sitobion avenae. However, few studies have attempted to identify the different defence responses induced in wheat by S. graminum and S. avenae feeding and the mechanisms underlying the activation of chlorosis by S. graminum feeding.
18p
viharuno2711
21-04-2020
9
1
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Feeding efficiency of the six species of beetle reared on mustard aphids, Lipaphis erysimi investigated under Departmental Laboratory of Plant Protection, DBS College of Agriculture and Allied Science, Selaqui, Deharadun, Uttrakhand. Coccinella septempuctata was most predominant predatory species on mustard aphid and consumed maximum numbers of aphids throughout the life with different larval stages as well as adult stage where as Illeis cincta consumed minimum aphids throughout the life and was correlated with the life span of the larval stadium.
7p
nguathienthan4
18-04-2020
17
1
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Teak Tectona grandis (Linnaeus), is the most preferred afforested species of Odisha as well as India. Among the total 42 species of insect pests recorded in seedlings of this sps., Hyblaea puera, Eutectona machaeralis, Lachnosterna serrata, five species of grass hoppers, Jassids, spittle bugs, Myllocerus beetle, Mealy bugs, aphid and, Tussock moth larvae were prominent in causing damage.
8p
kethamoi4
16-04-2020
10
1
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Large Cardamom is common cultivated spice crop in Nepal as well as in India and Bhutan. Large Cardamom is prone to many diseases, among them viral diseases are annihilative which causes sententious yield loss. Field surveys were conducted during different seasons of 2016-17. Chirke is serious as far as rate of spread is concerned and Foorkey is serious as far as yield loss is concerned. Chirke is caused by Large Cardamom Chirke Virus (LCCV), a new virus species under the genus Macluravirus, family Potyviridae and is characterized by mosaic with pale streak on the leaves.
6p
trinhthamhodang1212
06-04-2020
8
1
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Present field studies were conducted during the Rabi season of year 2015-16 at Regional Research Station, Rohtak (Haryana), India, to assess the yield losses due to mustard aphid in various Brassica spp. (B. juncea, B.napus and B. rapa) sown under early and late sown conditions. The avoidable losses in terms of seed yield varied from 9.26 to 17.48 per cent, found lowest (9.26%) in HNS 0901 whereas, highest (17.48%) in BSH 1 under timely sown conditions. These losses ranged from 20.11 to 32.62 per cent under late sown conditions, found lowest (20.11%) in HNS 0901 although highest (32.
6p
chauchaungayxua3
07-02-2020
9
1
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Population dynamics studies of mustard aphid, L. erysimi on three Rapeseed-mustard varieties i.e. RH 0749, HNS 0901 and BSH 1 belonging to three Brassica spp. i.e. B. juncea, B. napus and B. rapa revealed that mustard aphid was available in the field from 3 rd Standard metrological week (SMW) (January) to 11th SMW (March). The peak aphid population (23.33-86.05 aphids/10 cm main apical shoot) was recorded during 9th SMW in all Brassica species (both timely and late sown) except in BSH 1 (timely sown) in which it attained peak (31.98 aphids/10 cm main apical shoot) in 6th SMW.
8p
cothumenhmong1
10-12-2019
15
1
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