U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            YANG, CHENGHAI - TX A&M EXP. STN.-WESLACOitem
                                            Greenberg, Shoilitem
                                            Everitt, Jamesitem
                                            Sappington, Thomasitem
                                            Escobar, David
  Submitted to: National Cotton Council Beltwide Cotton Conference
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 2/15/2001
                                    Publication  Date: N/A
                                    Citation: N/AInterpretive Summary: Remote sensing technology combined with ground measurements was used to evaluate artificial boll weevil damage in a cotton field in 2000.  Five different levels of artificial square damage (control, 10, 20, 40, and 60%) with three replications were assigned across 15 experimental plots according to an experimental design.  The artificial square damage was  performed on 25 May when punctured squares by boll weevils were found. Aircraft-based digital images were obtained from the field on 20, 28 June and 11 July.  Ground reflectance and plant physical data, including plant height, number of leaves, number of squares, and leaf greenness, were collected on 5 July.  Results from this preliminary study showed that severe square damage caused increased foliage and stalk development, thus affecting the spectral response of the cotton plant canopy.  Airborne digital imagery detected the differences in spectral response among various slevels of square damage.  These  preliminary findings indicate that airborne remote sensing techniques have potential for assessing boll weevil infestations within fields.  More experiments with more replications and intensive temporal observations are needed to further document and quantify the differences in plant characteristics and spectral response among various square damage levels.
                                Technical Abstract: Airborne digital imagery, in conjunction with ground reflectance and plant physical data, was used to evaluate simulated boll weevil damage in a cotton field in 2000.  Five different levels of artificial square damage (control, 10, 20, 40, and 60%) with three replications were assigned across 15 experimental plots in a randomized complete block design.  The  artificial square damage was performed on 25 May when punctured squares by boll weevils were found.  Airborne color-infrared (CIR) digital images were obtained from the field on 20, 28 June and 11 July.  Ground reflectance and plant physical data, including plant height, number of leaves, number of squares, and chlorophyll, were collected on 5 July.  The 20 and 28 June images revealed that plants with high artificial square damage levels showed higher spectral response in the near-infrared (NIR) band and lower spectral response in the red and green bands than those with lower damage  levels.  Plant height and number of leaves were significantly higher for plants with high damage levels than for those with low damage levels. However, there were no significant differences in either spectral response or plant physical characteristics between some of the damage levels.  These preliminary results indicate that airborne imagery has potential for assessing boll weevil infestations in cotton fields, but more experiments are needed.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov