Vol.18_No.2 - Pesticide Alternatives Lab - Michigan State University
Vol.18_No.2 - Pesticide Alternatives Lab - Michigan State University
Vol.18_No.2 - Pesticide Alternatives Lab - Michigan State University
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Spring 2009 Resistant Pest Management Newsletter Vol. 18, No. 2<br />
encouraged by minimizing the load of<br />
chemicals.<br />
The above-mentioned recommendations, if<br />
adopted, for management of Red spider mite<br />
population of the Dooars and Terai tea plantations are<br />
expected to provide a solution to the growing menace,<br />
that is often causing heavy losses of tea production.<br />
The suggestion, if implemented in letters and spirit,<br />
would possible reduced the load of chemical acaricides<br />
on the crops and also the environment, all the same<br />
usher in a region wide practice of integrated<br />
management of the pest, the necessity of the hour.<br />
REFERENCE<br />
Anonymous, 1994. Pests of Tea in North- East India and their<br />
control. Memorandum no: 27, Tocklai Experimental Station,<br />
Jorhat, Assam, India.<br />
Banerjee, B. 1968. Insect resistance. Two and a Bud, 16(1): 13-14.<br />
Barbora, B. C. and Biswas, A. K., 1996. Use pattern of pesticides<br />
in tea estates of North- East India. Two and a Bud, 43(2): 4-<br />
14.<br />
Cranham, J. E. and Helle, W., 1985. <strong>Pesticide</strong> resistance in<br />
Tetranychidae. pp. 405-421. In: Spider mites, their biology,<br />
natural enemies and control (Helle, W. and Sabelis, M. W. Eds),<br />
vol. 1A, Elsevier, Amsterdam.<br />
Das, G.M., 1959. Problems of pest control in tea. Science and<br />
Culture, 24: 493-498<br />
FAO, 2000 Inter-Country Programme for the Development and<br />
Application of Integrated Pest Management in Vegetable<br />
Growing in South and South-EastAsia.<br />
Finney, D. J., 1973. Probit Analysis, Cambridge <strong>University</strong> Press,<br />
Cambridge.<br />
Gurusubramanian, G., Borthakur, M., Sarmah, M. and Rahman,<br />
A. 2005. <strong>Pesticide</strong> selection, precautions, regulatory<br />
measures and usage. pp. 81-91. In: Plant Protection in tea:<br />
Proceedings of Plant Protection Work shop (Dutta, A.,<br />
Gurusubramanian, G. and Barthakur, B.K. Eds.), Tocklai<br />
Experimental Station, TRA, Jorhat Assam Printing Works<br />
Private Limited, Jorhat, Assam, India.<br />
Helle, W. and Sabelis, M. W., 1985. Spider mites: their biology,<br />
natural enemies and control. pp. 335. Elsevier Science<br />
Publishing Company INC., New York.<br />
Misra, R. K. 1989. Toxicity of various insecticides against Heliothis<br />
armigera Hub. Guntur strain. <strong>Pesticide</strong> Research Journal, 1:<br />
105-109.<br />
Mukhopadhyay, A. and Roy, S., 2009. Changing diminutions of<br />
IPM in the tea plantations of the North Eastern sub<br />
Himalayan region. pp. 290-302. In: Proceedings of National<br />
Symposium on IPM Strategies to Combat Emerging Pest in<br />
the Current Scenario of Climate change (Ramamurthy V.V.<br />
and Gupta. G. P. Eds.), January 28-30, 2009, Central<br />
Agricultural <strong>University</strong>, Pasighat, Arunachal Pradesh,<br />
India.<br />
Roy, S., Mukhopadhyay, A. and Gurusubramanian, G., 2008. A<br />
preliminary toxicological study of commonly used acaricides of<br />
tea red spider mite (Oligonychus coffee Neitner) of North<br />
Bengal, India. Resistance Pest Management Newsletter, 18(1):<br />
5- 10.<br />
Sahoo, B. Sahoo, S. K. and Somchaudhury, A. K. 2003. Studies<br />
on the toxicity of newer molecules against tea red spider<br />
mite. pp. 301. In: Proceedings of the National Symposium on<br />
Frontier Areas of Entomological Research, IARI & ESI,<br />
New Delhi, India.<br />
Sannigrahi, S. and Talukdar, T., 2003. <strong>Pesticide</strong> use patterns in<br />
Dooars tea industry. Two and a bud, 50: 35-38.<br />
Subramaniam, B. 1995. Tea in India. pp. 38-40. P.I.D. and Wiley<br />
Eastern Ltd.<br />
Ware, G. W. and Whitacre, D. M., 2004. An Introduction to<br />
Insecticides. In: The <strong>Pesticide</strong> Book. (Ed. 6), MeisterPro<br />
Information Resources, Willoughby, Ohio.<br />
Somnath Roy 1 , Ananda Mukhopadhyay 1 and<br />
G.Gurusubramanian 2<br />
1 Entomology Research Unit, Department of Zoology, <strong>University</strong> of<br />
North Bengal,<br />
Darjeeling-734 430, West Bengal, India<br />
2 Department of Zoology, Mizoram Central <strong>University</strong>, Tanhril,<br />
Aizawl -796 009, Mizoram, India<br />
Research in Resistance Management<br />
Preliminary Effects of Insecticidal Control of Asian Citrus Psyllid and Combinations of<br />
Nutrients and Systemic Acquired Resistance Elicitors on Incidence of Greening Disease in<br />
Citrus<br />
ABSTRACT<br />
A combination of systemic acquire resistance elicitors,<br />
with macro- and micro-nutrients have been used, with apparent<br />
success, by at least one Florida citrus grower to mitigate expression<br />
of symptoms related to Huanglongbing (HLB) or greening disease.<br />
A large scale field experiment to test the effects of this combination<br />
with and without insecticidal control of the vector, Diaphorina citri<br />
(Homoptera: Psyllidae) was initiated in a young block of citrus trees<br />
in southwest Florida. Visual symptoms of HLB were initially<br />
reduced, although differences compared to untreated trees became<br />
negligible four months after the first Special Foliar Treatment (SFT)<br />
in early summer application, and two months after the second<br />
application. Insecticide applications suppressed populations of D.<br />
citri adults and virtually no movement of the psyllid among plots<br />
inside the orange block was being observed. However, expression of<br />
HLB symptoms in the plants was not affected by insecticides.<br />
INTRODUCTION<br />
Huanglongbing (HLB) or citrus greening<br />
disease is considered by many as the most important<br />
disease of sweet orange, mandarin and grapefruits<br />
worldwide (Schwarz and Bove, 1975). HLB is found<br />
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