Assessment of Damage by the Tree Locust (Anacridium Melanorhodon Melanorhodon ) on Hashab Tree (Acacia Senegal) Using Ground Surveys and Remote Sensing Data
Total Page:16
File Type:pdf, Size:1020Kb
Assessment of Damage by the Tree Locust (Anacridium melanorhodon melanorhodon ) on Hashab Tree (Acacia senegal) using Ground Surveys and Remote Sensing Data By Ahmed Ismail Ahmed Safi B.sc. Agric.(Honours) Plant Protection Faculty of Agriculture University of Khartoum (1983) M.Sc. Faculty of Natural Resources and Environmental Studies University of Kordofan (2005) A thesis submitted to the Graduate College, University of Khartoum in fulfillment of the requirements for the degree of Doctor of Philosophy in Agriculture Supervisor: Prof. Dr. El Sayed El Bashir Mohamed Co-supervisor: Dr. Amna Ahmed Hamid Department of Crop Protection Faculty of Agriculture University of Khartoum May 2011 Members of Supervisory Committee: Signature Dr. Saied Elbashier, Assoc. Professor, ………………….. Faculty of Agriculture. University of Khartoum, Sudan. (Supervisor) Dr. Ammna Ahmed Hamid ……………… Remote Sensing Authority Director, Khartoum (Co- Supervisor) Examiners Committee: Signature Dr. ……………………………, ……………………………. Assoc. Professor, University of Khartoum (External examiner) Dr. ………………………………., ……………………………… Assist. Professor, University of Khartoum (Internal examiner) Dr. ………………………………., ……………………………….. Assoc. Professor, Faculty of Agriculture. University of Khartoum, Sudan. (Internal examiner) DEDICATION I dedicate this study to all members of my family and the people who promote the following values: humanity, honesty, efficiency, punctuality, accuracy, liberty, equality and fraternity. ahmed I ACKNOWLEDGEMENTS The positive contribution provided by many individuals and several institutions in the completion of this study is highly appreciated and accepted as well. First of all and last I would like to thank Allah, for giving me the health, strength and patience that supported me throughout the study period. I would like to express my special thanks and gratitude to my supervisor Prof. Dr. El Sayed El Bashir Mohamed, my co-supervisor Dr. Amna Ahmed Hamed (Director of remote sensing authority) for their advice and guide. I owe a lot of thanks to Prof. Emam Elkhidir and Prof. Ahmed Hashim for their valuable discussion and constructive comments in the seminar presented in Crop Protection Department, Faculty of Agriculture, University of Khartoum. The generous financial support from Elshiekh Zaki Hamdan, Director of Sheikan Insurance and Re-insurance Company Khartoum, is very much appreciated. Really, I appreciate very much the limitless help and the family atmosphere offered by the staff of Planet Action, Spot, France with special emphasis and deepest appreciation to Miss Patrica Dankha and Dr. Algis for their continuous help, providing free Spot imagery data of the study area. Really, I appreciate very much the limitless help and the family atmosphere offered by the staff of Remote Sensing Authority, Khartoum and I would like to emphasize my deepest appreciation to Dr. Moayad and Mr. Abdelrahman Ahmed Khatir for their continuous help and support in data analysis. Deep thanks are due to Acacia Company staff; Fisal, Rabie and their colleagues for their help, providing the study area and logistic support. Thanks extend to my colleagues in Gum Arabic Research Centre, University of Kordofan. Last and not least I would like to express my deep gratitude to my family for their limitless patience and support. II Abstract In the present study, a field survey, laboratory experiments and remote sensing were integrated and carried out for three successive seasons. The objectives were to access the role of tree locust infestation on quantity and quality of the produced gum arabic and to develop an alternative method for field survey of this pest. The field and remote sensing trials were conducted in an area of 28000 feddans (11331 hectares) of Acacia senegal plantation of the Acacia Project (Nawa and Elrahad locations), 37 km south east of El Obeid city, North Kordofan State. The results showed that adults were found throughout the year except in February, March and April and their number decreased with increase in rainfall and relative humidity. Hoppers appeared in July, August, September and October and their number increased with increase in rainfall and relative humidity. Experiments on quantitative effect on gum production due to natural and artificial defoliation of hashab (Acacia senegal) trees were carried out, where four blocks were chosen randomly, and the following treatments were arranged in a randomized complete block design: control (no defoliation), light natural defoliation, moderate natural defoliation, high natural defoliation, light artificial defoliation, moderate artificial defoliation and high artificial defoliation. The results revealed that tree locust infestation and the artificial defoliation of trees severely reduced gum production, and the reduction was highly significant (P≤0.001) between means of all treatments except between high natural defoliation and high artificial defoliation. There was a negative correlation between gum production and levels of defoliation. Laboratory experiments showed that defoliation reduced gum viscosity, and the reduction was significant between all means except between light natural defoliation and light artificial defoliation. Defoliation also reduced gum optical rotation, but the reduction was not statistically significant. III The developmental period of nymphs fed on young leaves was shorter than that of nymphs fed on old leaves. Both adults and hoppers daily consumed food equivalent to their body weight. Remotely sensed data, used in this study were collected from the American Landsat satellite (with sensors; ETM+) images dated August and October 2008, and the French Spot Satellite (with the sensors; XS) images dated August and November 2009. Visual interpretation of images showed that non- defoliated hashab trees appeared as red and defoliated ones appeared as grey. The Normalized Difference Vegetation Index (NDVI) differentiated between non-defoliated hashab trees and the three levels of natural defoliations. There was a positive relationship between NDVI value, tree greenness and gum production Supervised classification showed five major classes; non-defoliated, light, moderate and high defoliated hashab trees as well as areas of tree locust swarms. Supervised classes matched with NDVI classes. IV اﻟﻤﺴﺘﺨﻠﺺ ﺗﻢ إﺳﺘﺨﺪام اﻟﻤﺴﺢ اﻟﺤﻘﻠﻰ واﻟﺘﺠﺎرب اﻟﻤﻌﻤﻠﻴﺔ واﻹﺳﺘﺸﻌﺎرﻋﻦ ﺑﻌﺪ ﻟﺜﻼﺛﺔ أﻋﻮام ﻣﺘﺘﺎﻟﻴﺔ، ﺑﻬﺪف ﺗﻘﻴﻴﻢ دور إﺻﺎﺑﺔ اﻟﺠﺮاد ﺳﺎرى اﻟﻠﻴﻞ ﻷﺷﺠﺎراﻟﻬﺸﺎب ﻓﻰ آﻤﻴﺔ اﻟﺼﻤﻎ اﻟﻤﻨﺘﺞ وﻧﻮﻋﻴﺘﻪ و آﺬاﻟﻚ ﺗﻄﻮﻳﺮ ﻃﺮﻳﻘﺔ ﺑﺪﻳﻠﺔ ﻟﺤﺼﺮ هﺬﻩ اﻷﻓﺔ ﻣﻴﺪاﻧﻴﺎً. أُﺟﺮﻳﺖ اﻟﺘﺠﺎرب اﻟﺤﻘﻠﻴﺔ واﻟﻤﻌﻤﻠﻴﺔ ﻓﻲ ﻣﺴﺎﺣﺔ 28000 ﻓﺪان (11331هﻜﺘﺎر) ﺑﻐﺎﺑﺔ اﻟﻬﺸﺎب (Acacia senegal) اﻟﻤﺴﺘﺰرﻋﺔ ﺑﻤﺸﺮوع أآﻴﺸﻴﺎ اﻟﺰراﻋﻰ (ﻣﻮﻗﻌﻰ ﻧﻮى واﻟﺮهﺪ )، 35 آﻠﻢ ﺟﻨﻮب ﺷﺮق ﻣﺪﻳﻨﺔ اﻷﺑﻴﺾ، وﻻﻳﺔ ﺷﻤﺎل آﺮدﻓﺎن. أوﺿﺤﺖ اﻟﻨﺘﺎﺋﺞ وﺟﻮد اﻟﺤﺸﺮات اﻟﻜﺎﻣﻠﺔ ﻋﻠﻰ ﻣﺪاراﻟﺴﻨﺔ ﻣﺎﻋﺪا ﻓﺒﺮاﻳﺮ و ﻣﺎرس وأﺑﺮﻳﻞ وﻗﻠﺖ أﻋﺪادهﺎ ﻣﻊ زﻳﺎدة آﻤﻴﺔ اﻷﻣﻄﺎر واﻟﺮﻃﻮﺑﺔ اﻟﻨﺴﺒﻴﺔ. ﻇﻬﺮت اﻟﺤﻮرﻳﺎت ﻓﻲ ﻳﻮﻟﻴﻮ وأﻏﺴﻄﺲ و ﺳﺒﺘﻤﺒﺮ وأآﺘﻮﺑﺮوزادت أﻋﺪادهﺎ ﺑﺰﻳﺎدة آﻤﻴﺔ اﻷﻣﻄﺎر واﻟﺮﻃﻮﺑﺔ اﻟﻨﺴﺒﻴﺔ. أُﺟﺮﻳﺖ ﺗﺠﺎرب ﻟﺘﺤﺪﻳﺪ اﻟﺘﺄﺛﻴﺮاﻟﻜﻤﻲ ﻋﻠﻰ إﻧﺘﺎج اﻟﺼﻤﻎ ﺑﺴﺒﺐ إزاﻟﺔ أوراق ﺷﺠﺮة اﻟﻬﺸﺎب ﻧﺘﻴﺠﺔ ﻟﻬﺠﻮم اﻟﺠﺮاد ﺳﺎرى اﻟﻠﻴﻞ واﻹزاﻟﺔ اﻻﺻﻄﻨﺎﻋﻴﺔ. أُﺧﺘﻴﺮت أُرﺑﻌﺔ ﻣﺮﺑﻌﺎت ﺑﺸﻜﻞ ﻋﺸﻮاﺋﻲ، ووزﻋﺖ اﻟﻤﻌﺎﻣﻼت اﻟﺘﺎﻟﻴﺔ ﺑﻄﺮﻳﻘﺔ اﻟﻘﻄﺎﻋﺎت آﺎﻣﻠﺔ اﻟﻌﺸﻮاﺋﻴﺔ: اﻟﺸﺎهﺪ وإﺻﺎﺑﺔ ﻃﺒﻴﻌﻴﺔ ﺧﻔﻴﻔﺔ وإﺻﺎﺑﺔ ﻃﺒﻴﻌﻴﺔ ﻣﺘﻮﺳﻄﺔ وإﺻﺎﺑﺔ ﻃﺒﻴﻌﻴﺔ ﻋﺎﻟﻴﺔ وإﺻﺎﺑﺔ ﻣﺴﺘﺤﺪﺛﺔ ﺧﻔﻴﻔﺔ وإﺻﺎﺑﺔ ﻣﺴﺘﺤﺪﺛﺔ ﻣﺘﻮﺳﻄﺔ وإﺻﺎﺑﺔ ﻣﺴﺘﺤﺪﺛﺔ ﻋﺎﻟﻴﺔ. أﻇﻬﺮت اﻟﻨﺘﺎﺋﺞ أن اﻹﺻﺎﺑﺔ ﺑﺠﺮاد اﻟﺸﺠﺮﺗﻘﻠﻞ ﺑﺪرﺟﺔ آﺒﻴﺮة إﻧﺘﺎج اﻟﺼﻤﻎ وآﺎن هﻨﺎك ﻓﺮق ﻣﻌﻨﻮى ﻋﺎﻟﻲ (P<0.001) ﺑﻴﻦ ﺟﻤﻴﻊ اﻟﻤﺘﻮﺳﻄﺎت ﻣﺎﻋﺪا ﺑﻴﻦ اﻹﺻﺎﺑﺔ اﻟﻄﺒﻴﻌﻴﺔ اﻟﻌﺎﻟﻴﺔ واﻹﺻﺎﺑﺔ اﻟﻤﺴﺘﺤﺪﺛﺔ اﻟﻌﺎﻟﻴﺔ وإرﺗﺒﺎط ﺳﻠﺒﻰ ﺑﻴﻦ إﻧﺘﺎج اﻟﺼﻤﻎ وﻣﺴﺘﻮى اﻹﺻﺎﺑﺔ. أﺛﺒﺘﺖ اﻟﺘﺠﺎرب ﻓﻰ اﻟﻤﺨﺘﺒﺮ أن إزاﻟﺔ أُوراق اﻷُﺷﺠﺎر ﻳﺨﻔﺾ درﺟﺔ ﻟﺰوﺟﺔ اﻟﺼﻤﻎ وآﺎن اﻟﺘﺨﻔﻴﺾ ﻣﻌﻨﻮﻳﺎً (P<0.001) ﺑﻴﻦ آﻞ اﻟﻤﺘﻮﺳﻄﺎت ﻣﺎﻋﺪا ﺑﻴﻦ اﻹﺻﺎﺑﺔ اﻟﻄﺒﻴﻌﻴﺔ اﻟﺨﻔﻴﻔﺔ واﻹﺻﺎﺑﺔ اﻟﻤﺴﺘﺤﺪﺛﺔ اﻟﺨﻔﻴﻔﺔ. أ ﻳ ﻀ ﺎً اﻇﻬﺮت اﻟﺘﺠﺮﺑﺔ أن إﺻﺎﺑﺔ اﻟﺠﺮاد ﺗﺆﺛﺮ ﻋﻠﻰ اﻟﺪوران اﻟﻨﻮﻋﻰ ﻟﻜﻦ ﻟﻢ ﺗﻜﻦ هﻨﺎك ﻓﺮوﻗﺎت ﻣﻌﻨﻮﻳﺔ ﺑﻴﻦ آﻞ اﻟﻤﺘﻮﺳﻄﺎت. إﺳﺘﻐﺮﻗﺖ اﻟﺤﻮرﻳﺎت اﻟﺘﻰ ﺗﻤﺖ ﺗﻐﺬﻳﺘﻬﺎ ﻋﻠﻰ اﻷوراق اﻟﺼﻐﻴﺮة اﻟﻌﻤﺮ ﻣﺪة ﺗﻄﻮرأﻗﺼﺮﻣﻦ اﻟﺤﻮرﻳﺎت اﻟﺘﻰ ﺗﻤﺖ ﺗﻐﺬﻳﺘﻬﺎ ﻋﻠﻰ اﻷوراق اﻟﻜﺒﻴﺮة اﻟﻌﻤﺮ. إﺳﺘﻬﻠﻜﺖ آ ﻞِ ﻣﻦ اﻟﺤﺸﺮات اﻟﻜﺎﻣﻠﺔ واﻟﺤﻮرﻳﺎت ﻏﺬاء ﻳﻮﻣﻲ ﻳﻜﺎﻓﺊ وزﻧﻬﺎ. ﻓﻰ ﻣﺠﺎل اﻹﺳﺘﺸﻌﺎرﻋﻦ ﺑﻌﺪ ﺗﻢ اﻟﺤﺼﻮل ﻋﻠﻰ ﺻﻮرأﻗﻤﺎرأﻣﺮﻳﻜﻴﺔ Landsat (8/2008 و 10/2008) وﻓﺮﻧﺴﻴﺔ Spot (2009/8 و11/2009). أوﺿﺢ اﻟﺘﻔﺴﻴﺮاﻟﺒﺼﺮى ﻟﺼﻮراﻷﻗﻤﺎر وﺟﻮد أﺷﺠﺎرهﺸﺎب ﻏﻴﺮ ﻣﺼﺎﺑﺔ ذات أﻟﻮان ﺣﻤﺮاء وأﺷﺠﺎر ﻣﺼﺎﺑﺔ ذات أﻟﻮان رﻣﺎدﻳﺔ. أوﺿﺢ ﻣﺆﺷﺮاﻹﺧﻀﺮار اﻷﺷﺠﺎرﻏﻴﺮاﻟﻤﺼﺎﺑﺔ وﺛﻼﺛﺔ ﻣﺴﺘﻮﻳﺎت ﻟﻺﺻﺎﺑﺔ اﻟﻄﺒﻴﻌﻴﺔ وﺗﻨﺎﺳﺐ ﺗ ﻨ ﺎ ﺳ ﺒ ﺎً ﻃﺮدﻳﺎً ﻣﻊ ﺣﺎﻟﺔ إﺧﻀﺮاراﻟﺸﺠﺮة وإﻧﺘﺎج اﻟﺼﻤﻎ ودل اﻟﺘﺼﻨﻴﻒ اﻟﻤُﺮاﻗﺐ ﻋﻠﻰ أن هﻨﺎﻟﻚ ﺧﻤﺲ ﻣﺠﻤﻮﻋﺎت V رﺋﻴﺴﻴﺔ: أﺷﺠﺎرﻏﻴﺮ ﻣﺼﺎﺑﺔ وأﺷﺠﺎر ذات إﺻﺎﺑﺔ ﺧﻔﻴﻔﺔ و أﺷﺠﺎر ذات إﺻﺎﺑﺔ ﻣﺘﻮﺳﻄﺔ وأﺷﺠﺎر ذات إﺻﺎﺑﺔ ﻋﺎﻟﻴﺔ وﻣﻨﺎﻃﻖ أﺳﺮاب ﺟﺮاد اﻟﺸﺠﺮ. وﺟﺪ ﺗﻮاﻓﻖ ﺑﻴﻦ اﻟﺘﺼﻨﻴﻒ اﻟﻤُﺮاﻗﺐ وﻣﻮًﺷﺮاﻹﺧﻀﺮار. VI LIST OF CONTENTS Subject Page DEDICATION I ACKNOWLEDGEMENTS I I ABSTRACT I I I ARABIC ABSTRACT V LIST OF CONTENTS VII LIST OF TABLES XI LIST OF FIGURES XIII LIST OF TEMPLATES XV LIST OF IMAGES XVI CHAPTER ONE: INTRODUCTION 1 1.1 Objectives 3 CHAPTER TWO: LITERATURE REVIEW 5 2.1 The tree locust Anacridium melanorhodon melanorhodon 5 2.1.1 Taxonomy and nomenclature 5 2.1.2 Geographical distribution 6 2.1.3 General morphology 8 2.1.4 Economic importance and damage 10 2.1.4.1 Host plants and feeding habits A.m.melanorhodon 14 2.1.5 Ecology 17 2.1.6 Biology 18 2.1.7 Natural enemies 20 2.1.8 Control 21 2.1.8.1Chemical control 21 2.1.8.2 Mycopesticides 22 2.1.8.3 Botanicals 22 VII 2.1.8.4 Cultural control of grasshoppers and locusts 23 2.2 Remote sensing 24 2.2.1 Why is remote sensing 25 2.2.2 Applications of remote sensing in Sudan 25 2.2.3 Digital image processing 27 2.2.4 Images interpretation and analysis 28 2.2.5 Image classification 29 2.3 Geographic Information System (GIS) 31 2.4 Global Positioning