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Research Detail

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U.K.S. Khanam
Researcher
C/O Nur Ahmed Head, Entomology Division BRRI, Gazipur 1701

M. Hossain
Researcher
C/O Nur Ahmed Head, Entomology Division BRRI, Gazipur 1701

Nur Ahmed
CSO (C.C)
Head, Entomology Division BRRI, Gazipur 1701

M.M. Uddin
Researcher
C/O Nur Ahmed Head, Entomology Division BRRI, Gazipur 1701

M.S. Hossain
Researcher
C/O Nur Ahmed Head, Entomology Division BRRI, Gazipur 1701

The screening of thirty tomato varieties/lines to tomato fruit borer, Helicoverpa armigera (Hub.) infestation in relation to their morphological characters was conducted in different laboratories of BAU and Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during rabi season, November 1999 to March 2000. The tomato fruit borer infestation varied significantly among the varieties/lines and also with the age of the tomato plants. Among the varieties/lines, V-29 and V-282 were found moderately resistant and susceptible, respectively. Plant height, stem diameter, total number of branches/plant, total number of leaves/plant, 2nd leaf area, total leaf chlorophyll, number of leaf hair and number of fruits/plant of V-29 line were 81.74 cm, 1.45 cm,  14,453, 19.58 sq.cm, 1.13 mg/g, 12 and 48, respectively. Again the aforementioned characters for V-282 line were 80.74 em, 1.18 cm, 9, 396, 21.57 sq.cm, 1.24 mg/g, 17 and 30, respectively.
  Tomato, Helicoverpa armigera (Hub.), Resistant, Morphological characters
  BAU, BINA and BARI
  00-11-1999
  00-03-2000
  Pest Management
  Insects
  1. To test damage level caused by tomato fruit borer of resistant and susceptible tomato varieties/lines by field screening.
  2. To identify the plant morphological characters influencing the infestation rate of tomato fruit borer
  3. To study the relation of leaf colour/pigment (i.e. chlorophyll 'a' and 'b') with infestation rate of tomato fruit borer.
The research work was carried out at Genetics and plant breeding farm (GPB farm) and at different Laboratories of Bangladesh Agricultural University (BAU) and Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh during the period from November 1999 to March 2000. The experimental field belongs to the old Brahmaputra Alluvium Soil Tract characterized by sandy loam soil with fine texture having a pH value of 6.5. For the experiment, thirty tomato varieties/lines were used. Most of them were obtained from Genetics and plant Breeding Department, BAU, Mymensingh and the rest were collected from Bangladesh Agricultural Research Institute (BARI), Gazipur and Asian Vegetable Research and Development Centre (AVRDC), Taiwan. Following different methods were used to address all the objectives-Field screening of tomato varieties/lines against tomato fruit borer Calculation of percentage of tomato fruit borer infestation Identification of plant morphological characters influencing the infestation rate of tomato fruit borer Study on the relation of leaf colour/pigment (i.e. chlorophyll 'a' and 'b') with infestation rate of tomato fruit borer:
 

 

  Pak. J. Biolo. Sci. 6(3): 255-263
  
Funding Source:
1.  Government Budget:  
  
The direct effect of fruit no per plant on tomato fruit borer infestation were negative (-0.3507). Its indirect effects via plant height, leaf chlorophyll and leaf hair per unit area were negative but stem diameter, number of branches per plant, number of leaves per plant were positive, which made the total correlation co-efficient between number of fruit per plant and tomato fruit borer infestation positive.

 

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