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Wyszukujesz frazę "Aphis gossypii" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Myrmecophilous association between ants and aphids – an overview
Autorzy:
Saha, Sumana
Das, Tanusri
Raychaudhuri, Dinendra
Powiązania:
https://bibliotekanauki.pl/articles/1109492.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ants-aphids
Aphis gossypii
Myrmecophily
Rhopalosiphum maidis
Opis:
Ant-aphid mutualism is considered as a beneficial, reciprocal and myrmecophilous association. Ants farm aphids, harvesting honeydew or flesh, in return protect the aphids from their natural foe i.e. predators and parasites and perhaps for other benefits like acceleration of aphid’s growth and reproductive rate and in the establishment of aphid colony. And finally aphid could get a pest status. Some of the aphid species are better adapted to profit from the presence of ants than others and benefits are more marked in small populations than in large ones (Saha & Raychaudhuri, 1998). Therefore, it seems essential to know about the interacting ants, their relationship with aphids in any agroecosystem for a better management strategy. The present paper attempts to document the aphids and aphidocolous ants against different host plants. Our investigation during August, 2017 – July, 2018 results a total of 40 aphid infested host plants along with 7 species of aphidocolous ants. Out of 10 aphid species recorded Aphis gossypii (Glover) is tended by more no. of ant species (5) followed by Rhopalosiphum maidis (Fitch) by four (4) species of ants. Aphidocolous ants demand serious attention as their attendance promotes aphids to reach pest status as well as ant populations need a check so that they may take care of fewer aphid individuals.
Źródło:
World News of Natural Sciences; 2018, 20; 62-77
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of pest complex of brinjal in the farmland of Ramakrishna Mission Ashrama Campus, Narendrapur, West Bengal, India
Autorzy:
Saha, Sumana
Adhikary, Sushmita
Raychaudhuri, Dinendra
Powiązania:
https://bibliotekanauki.pl/articles/1031664.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Aphis gossypii
Bemisia tabaci
Brinjal pests
Centrococcus insolitus
Henosepilachna vigintioctopunctata
Leucinodes orbonalis
seasonal incidence
Opis:
A field trial is conducted to study the seasonal incidence of five pests namely Brinjal shoot & fruit borer [Leucinodes orbonalis Guenee], Hadda beetle [Henosepilachna vigintioctopunctata (Fabricius)], Mealy bug [Centrococcus insolitus (Green)], Aphid [Aphis gossypii (Glover) and White fly Bemisia tabaci (Gennadius) on brinjal in relation to weather parameters at agricultural farm of RKMVERI campus, Narendrapur during kharif & rabi crop seasons (2019-20). The brinjal crops receive pests load from 9 to 15 week plant age and 10 to 17 week plant age during kharif and rabi crop season respectively. The all five pests attain maximum peak sequentially sharing various microhabitats for feeding on host plants. Among the five pests recorded shoot & fruit borer appears as the major pest enjoying the crop to its optimum throughout the season till harvest and seems to cause heavy damage in brinjal production. Mealy bugs attack the brinjal leaves only in the kharif crop whereas white flies are encountered in the field during rabi crop season only. In kharif season during the crop growing period, borer caterpillar incidence % is significant and positively correlated with avg. temperature (°C). For rabi season due to lack of complete field data on the incidence pattern of pest species correlation coefficient values are not generated. Data generated so far prompts to assume that the pest species are now with strong genetic stability irrespective of climate change and/or improvised agronomic practices.
Źródło:
World Scientific News; 2020, 146; 255-273
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Resistance risk assessment: realized heritability, cross resistance and resistance stability of acetamiprid in the cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae)
Autorzy:
Mokbel, E.M.S.
Powiązania:
https://bibliotekanauki.pl/articles/65165.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
resistance risk
assessment
heritability
resistance stability
acetamiprid
cotton aphid
Aphis gossypii
Homoptera
Aphididae
Opis:
The cotton aphid, Aphis gossypii is an economically significant insect pest infesting various important crops and vegetables. The neonicotinoid, acetamiprid was recommended against aphids with excellent results. Resistance emergence and environmental pollution makes acetamiprid a favorable alternative to conventional insecticides. The aims of the present work were to predict acetamiprid resistance risk in A. gossypii, investigate cross resistance to other tested insecticides and explore acetamiprid stability in the absence of selection. A field-collected population from Sharqia governorate, Egypt was selected with acetamiprid. After 16 generations of selection, there was a 22.55-fold increase in LC50 and the realized heritability (h2) of resistance was 0.17. Projected rates of resistance indicated that, ifh2 = 0.17 and 50% of the population was killed at each generation, then a tenfold increase in LC50 would be expected in 12.2 generations. If h2 was 0.27 then 7.63 generations would be needed to achieve the same level. In contrast, with h2 of 0.07 it necessitates about 30 generations of selection to reach the same level. Cross resistance studies exhibited that the selected strain showed obvious cross resistance to the other tested neonicotinoid members, moderate cross resistance to alpha-cypermethrin and no cross resistance to pymetrozine. Fortunately, resistance to acetamiprid in the cotton aphid was unstable and resistance reverses the nearby susceptible strain throughout five generations without exposure to acetamiprid. Our results exhibited cotton aphid potential to develop resistance to acetamiprid under continuous selection pressure. The instability of acetamiprid makes A. gossypii amenable to resistance management tactics such as rotation with pymetrozine.
Źródło:
Journal of Plant Protection Research; 2018, 58, 4
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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