Screening of some brinjal varieties and lines against brinjal shoot and fruit borer, Leucinodes orbonalis Guenee
2002
Hossain, M.M. (Bangladesh Rice Research Inst., Gazipur (Bangladesh). Entomology Div.) | Shahjahan, M. | Salam, M.A. | Begum, M.A.
Twenty varieties and lines of brinjal were screened out to observe their resistance level to brinjal shoot and fruit borer Leucinodes orbonalis Guenee (Pyralidae: Lepidoptera) infestation in the field conditions. The infestation varied significantly among the varieties/ lines. The brinjal shoot and fruit borer infestations for different varieties/lines were found in the following order of intensity: Nayankajal greater than BLO95 greater than BL085 greater than BLO98 greater than BLO114 greater than Khotkhotia-2 greater than Borka greater than Laffa greater than Islampuri greater than BLO45 greater than Dhohazari-2 greater than BLO101 greater than Dhohazari-i greater than Khotkhotia-1 greater than BLO96 greater than Sada ball greater than Singnath greater than Uttara greater than Baromashi greater than Jhumki. Varietal resistance of brinjal against brinjal shoot and fruit borer indicated significant variations among different brinjal varieties/line. Plant age had significant effect on the incidence of brinjal shoot and fruit borer. Highest percentage (32.89) of brinjal shoot and fruit borer infestation was observed at 70 DAT and lowest (5.18) was found at 40 DAT. The rate of infestation gradually increased with the increase of plant age and then decreased in 100 DAT. Highest percentage of infestation was observed in 70 DAT, which was significantly different from 40 DAT but identical with 100 DAT.
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