Estimation of yield losses and management of sucking pests on transgenic cotton

118 Pages·2016·1.63 MB·English

Estimation of yield losses and management of
sucking pests on transgenic cotton

BY
RAMALAKSHMI VECMALAPU
B.Sc. (Ag.)

THESIS SUBMITTED TO THE
ACHARYA N.G.RANGA AGRICULTURAL UNIVERSITY
IN PARTIAL FULFILMENT OF THE REQUIREMENTS
FOR THE AWARD OF THE DEGREE OF

MASTER OF SCIENCE IN AGRICULTURE

CHAIRPERSON: Dr.G.M.V. Prasada Rao

DEPARTMENT OF ENTOMOLOGY
AGRICULTURAL COLLEGE, BAPATLA
ACHARYA N.G.RANGA AGRICULTURAL UNIVERSITY
RAJENDRA NAGAR, HYDERABAD – 500 030
2012
LIST OF CONTENTS
Chapter No. Title Page No.
I INTRODUCTION
II REVIEW OF LITERATURE
III MATERIAL AND METHODS
IV RESULTS AND DISCUSSION
V SUMMARY AND CONCLUSIONS
LITERATURE CITED
APPENDICES
CERTIFICATE
This is to certify that the thesis entitled “Estimation of yield losses and
management of sucking pests on transgenic cotton” submitted in partial
fulfilment of the requirements for the degree of Master of Science in
Agriculture of the Acharya N. G. Ranga Agricultural University, Hyderabad is a
record of the bonafide original research work carried out by Ms.V.
Ramalakshmi under our guidance and supervision.
No part of the thesis has been submitted by the student for any other
degree or diploma. The published part and all assistance received during the
course of investigations have been duly acknowledged by the author of the thesis.

(G.M.V. PRASADA RAO)
Chairman of the Advisory Committee
Thesis approved by the Student’s Advisory Committee.
Chairman : Dr. G.M.V. PRASADA RAO ___________________________
Senior Scientist (Entomology),
RARS, Lam,Guntur.

Member : Dr. T. Madhumathi _____________________________
Associate Professor
Dept. of Entomology
Agricultural College, Bapatla.
Member : Dr. P. Anil Kumar ____________________________
Associate Professor
Dept. of plant pathology
Agricultural College, Bapatla.

Date of final viva – voce:
DECLARATION
I Ms.V. RAMALAKSHMI, hereby declare that the thesis entitled
“Estimation of yield losses and management of sucking pests on
transgenic cotton” submitted to the Acharya N.G. Ranga Agricultural
University for the degree of Master of Science in Agriculture is the result of the
original research work done by me. I also declare that no material contained in
the thesis has been published earlier in any manner.

Date:
Place: Bapatla

(RAMALAKSHMI.V)
CERTIFICATE
Ms. V. RAMALAKSHMI has satisfactorily prosecuted the course of
research and that the thesis “Estimation of yield losses and management of
sucking pests on transgenic cotton” submitted is the result of original
research work and is of sufficiently high standard to warrant its presentation to
the examination. I also certify that neither the thesis nor its part there of has been
previously submitted by her for a degree of any university.

Date: ( G.M.V. PRASADA RAO)
Major Advisor
Place: Bapatla Senior Scientist (Entomology), RARS,
Lam, Guntur.

ACKNOWLEDGEMENTS

At the outset, I owe my obeisance to the Almighty ‘Lord Ganesh’ for showing his
grace and blessings on me for successful completion of my research work.
“A real Professor always teach sincerely with spiritual philosophy”. I am
thankful to the Almighty in providing such a colossal personality,
Dr. G. M. V. Prasada Rao, Senior Scientist, RARS, Lam, Guntur, as the chairman
of my Advisory committee, who with all interest, dedication and empathy has devoted
his valuble time, patiently to mend majority thinking from conception to completion
of this task. I owe him a huge debt of gratitude forever for all that I got from him.
My deep sense of gratitude is due to the member of my Advisory committee,
Dr. T. Madhumathi, Associate Professor, Department of Entomology, Agricultural
College, Bapatla for her keen interest and cooperation during the prosecution of
research work. I accord my sincere thanks to Dr. P. Anil Kumar, member of my
Advisory Committee, Associate Professor, Department of Plant pathology,
Agricultural College, Bapatla for his timely and valuable help rendered during the
course of investigation.
I deem it a great privilege to express my gratitude to Dr. G. Raghavaiah,
Professor & Head, Department of Entomology, Agricultural College, Bapatla for his
unstinted attention, constant encouragement, constructive criticism, Valuable
suggestions, munificent acquiescence and generous help during the course of
investigation.
I wish to express my profound gratitude to Dr. V. Deva Prasad, Dr. P. V.
Krishnayya and Dr. G. Ramachandha rao faculty members of Entomology for
their timely help.
I humbly express my profound sence of gratitude and sincere thanks to
Mrs. T. Sujatha for her splendid and constant guidance, for the timely and
successful accomplishment of my research work.
I have dearth of words to express my heartfelt feelings to my beloved parents
Sri. V. Govinda rao and Smt. V. Lakshmi, ever loving brother and sister Ganesh
Kumar and Jyothsna for their love and efforts in shaping my career since child hood
and bring out the best in each of my endeavours with boundless affection and
affectionately eulogize the being inspiration and cooperation extended to me by my
Uncles, Aunties, lovable brothers Govinda, Ashok, Vasu, Hyma, Eswari, Aruna,
bhavani, Ratnam , Jaya and varalaxmi.
I extend my sincere thanks to my seniors Shravanti, Pradeep and Malyadri
for their help during the entire period of study.
I thankful to my contemporaries, Gayatri, Suni, Jyothi, Naji, siri,
Manendra and junior friends for their affectionate help during the study.
I wish to express my unboundful love and fondness to my beloved everlasting
friends Radhi, Uma, Asha, Gowri, Praveena, Karthika, Jairam and Jagadish
anna for timely help, constant encouragement and dedicated efforts without whose
encouragement and invaluable moral support, the thesis would not have seen the light
of the day.
I express my deepest sense of affection on my friends Prassu, Krish, Swapna,
Durga, Varam, Swati, Pritivi, Jhansi, Sandya, Rekha, Madhavi, Jagan,
Raviteja, Srinivas, Mahesh, Prasad and Patta for their memorable friendship
and cooperation.
I am highly thankful to Mr. Raghu and other library staff for extending their
cooperation.
I am thankful to Acharya N.G.Ranga Agricultural University for providing
financial assistance in form of stipend and the facilities provided by the library during
the course of MSc.
Finally I record my deep sincere thanks to all those who have helped me
directly and indirectly to bring out this work in the present form.

Place: Bapatla (V. Ramalakshmi...)
Date :
LIST OF TABLES

Table Title
Page
No
No.
3.1 Particulars of insecticides used
4.1 Incidence of leafhopper on different hybrids under protected and
unprotected conditions
4.2 Leafhopper injury grades in different cotton hybrids
4.3 Incidence of aphids on different hybrids under protected and
unprotected conditions
4.4 Incidence of thrips on different hybrids under protected and
unprotected conditions
4.5 Incidence of whitefly on different hybrids under protected and
unprotected conditions
4.6 Mean incidence of sucking pests on different cotton hybrids
under protected and unprotected conditions
4.7 Cotton seed yield and yield loss
4.8 Bioefficacy of different novel insecticides against Leafhopper, A.
biguttula biguttula
4.9 Mean efficacy of different novel insecticides against
leafhopper
4.10 Bioefficacy of different novel insecticides against aphids,
A. gossypii
4.11 Bioefficacy of different novel insecticides against thrips, T.tabaci
4.12 Bioefficacy of different insecticides against whitefly, B.
tabaci
4.13 Mean efficacy of different novel insecticides against aphids,
thrips and whiteflies
4.14 Cotton seed yield
LIST OF FIGURES

Fig.
Page
No. Figures
No.
3.1 Layout of the yield loss trial

3.2 Layout of the management trial

4.1 Mean per cent reduction of leafhoppers over control at 10 days after

treatment
4.2 Mean per cent reduction of aphids over control at 10 days after

treatment
4.3 Mean per cent reduction of thrips over control at 10 days after

treatment
4.4 Mean per cent reduction of whiteflies over control at 10 days after

treatment