Relative susceptibility of tea mosquito bug, Helopeltis theivora Waterhouse and red spider mite, Oligonychus coffeae Nietner eggs to commonly used pesticides

• Autorzy: Roy S. , Mukhopadhyay A. , Gurusubramanian G.

Warianty tytułu

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Względna wrażliwość jaj Helopeltis theivora Waterhouse i Oligonychus coffeae Nietner na powszechnie stosowane pestycydy

• Języki publikacji: EN

Abstrakty

EN

The tea mosquito bug (Helopeltis theivora Waterhouse) and red spider mite (Oligonychus coffeae Nietner) are the two major pests of tea (Camellia sinensis L.). Their intensity of infestation was increasing day by day in an alarming proportionand increasing resistance to pesticides constitutes a serious problem in North Bengal tea plantations, India. One of the insecticide resistance management strategies is the use of chemicals that can effectively control the pest in the initial life stage (egg stage). However most of the earlier studies were doneto control the mobile stages of H. theivora and O. coffeae. The present experiment was conducted to evaluate the effectiveness of acaricides/insecticides in killing its eggs. On the basis of LC50values, the descending order of ovicidal toxicity of different commonly used insecticides to H. theivora eggs were: etofenprox, β-cyfluthrin,cypermethrin, imidacloprid, fenpropathrin, λ-cyhalothrin, deltamethrin,profenofos, monocrotophos, thiomethoxam, alphamethrin, dimethoate, quinalphos,chlorpyriphos, oxydemeton methyl, acephate, azadirachtin and endosulfan. In case of O. coffeae eggs the lowest LC50 value was determined for fenazaquin, which was followed by profenophos, propargite, fenpropathrin,ethion, dicofol, abamectin and finally by azadirachtin. The data obtained in the present study may be used as a tool of IRM (integrated resistance management) strategies that can effectively control the pests in the initial stage itself (egg stage).

PL

Chrząszcz Helopeltis theivora Waterhouse i czerwony pajęczak Oligonychus coffeae Nietner, są dwoma głównymi szkodnikami herbaty (Camellia sinensis L.). Nasilenie ich występowania wzrasta z dnia na dzień w alarmującym tempie, a zwiększająca się odporność na pestycydy stanowi poważny problem na plantacjach herbaty w północnym Bengalu w Indiach. Jedną ze strategii zapobiegania wytwarzaniu się odporności na pestycydy jest stosowanie środków chemicznych mogących skutecznie zwalczać szkodnika w początkowym stadium rozwoju (jaja). Większość dotychczasowych badań dotyczyła eliminowania ruchliwych stadiów H. theivora i O. coffeae. Eksperyment przeprowadzono w celu oceny skuteczności akarycydów i insektycydów w niszczeniu jaj. Na podstawie wartości LC50 ustalono następującą, malejąca kolejność skuteczności różnych, powszechnie stosowanych insektycydów w zabijaniu jaj H. theivora: etofenprox, β-cyfluthrin, cypermethrin, imipdacloprid, fenpropathrin, λ-cyhalothrin, deltamethrin, profenofos, monocrotophos, thiomethoxam, alphametrin, dimethoate, quinalphos, chlorphyriphos, oxydemeton metyl, acephate, azadirachtin i endosulfan. W przypadku O. coffeae najniższą wartość LC50 ustalono dla fenazaquinu, a następnie dla związków: profenophos, propargite, fenpropathrin, ethion, dicofol, abamectin oraz azadirachtin. Wyniki badań mogą być wykorzystane jako element integrowanych programów roślin, mogących skutecznie zwalczać szkodniki w początkowym stadium ich rozwoju.

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2010
• Tom: 50
• Numer: 3
• Opis fizyczny: p.244-249,fig.,ref.

Twórcy

autor

Roy S.

• Entomology Research Unit, Department of Zoology, University of North Bengal

autor

Mukhopadhyay A.

autor

Gurusubramanian G.

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