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Disease Insect Reactions of Sweet Pepper Under the Field Conditions of Bangladesh

S. R. Saha
Horticulture Research Centre, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701

M. H. Rashid
Horticulture Research Centre, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701

L. Yasmin
Horticulture Research Centre, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701

M. M. Alam
Regional Agricultural Research Station, BARI, Ishurdi, Pabna, Bangladesh

M. A. Hossain
Regional Agricultural Research Station, BARI, Ishurdi, Pabna, Bangladesh

Abstract/ Executive Summary:

The study was conducted at Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur-1703, during October, 2000 to March 2001 to find out the resistant source of diseases and insects of sweet pepper under field condition. The incidence of thrips was calculated and grading was done slightly modified on the basis of mean percentage plant infection as highly resistant (o %), resistant (1-5 %), moderately resistant (6-20 %), moderately susceptible (26-50 %) and susceptible (51-100 %). From the field performance study it was evident that the genotypes SP011 was highly resistant whereas, SP002, SP006, SP010 and SP012 were observed to be resistant to Thrips. In case of Mites, none of the genotypes was highly resistant but SP002, SP006, SP007 and SP011 were categorized as resistant. Incidence of yellow leaf curl virus, potato virus-Y and fusarium wilt were not severe and graded as resistant to highly resistant under field conditions. Yield per hectare was the highest (27.00 t) in SP009 followed by SP006 (26.24 t/ha) and it was the lowest in SP002 (5.06 t/ha).

Keywords: Resistant sweet pepper, reaction of insect and disease, yield

Location: The research farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur, Bangladesh

Start Date: 00-10-2000

End Date: 00-03-2001

Program Area: Pest Management

Commodity: Chilli

Objectives:

To find out the insect pest and disease reactions and yield of 12 open pollinated sweet pepper accessions under Bangladesh conditions.

Methodology:

The experiment was carried out at the research farm of the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur, Bangladesh during October, 2000 to March 2001. Seeds of sweet pepper were kept in cool room at 4^oC temperature for about four and half months, so, after taking out from the cool room, the seeds were kept for 3-4 hours at normal air temperature in the laboratory. To minimize Tobamoviruses (TMV. ToMV and PMMV) seed infection, seeds were soaked in a 10% (w/v) solution of Trisodium Phosphate (TSP) for 30 minutes and transferred them to a fresh solution of 10% TSP for two hours and rinsed in running water for 45 minutes. They were then soaked in water for 24 hours in order to facilitate germination. Sowing medium on plastic tray was autoclaved at 120^oC for 2 hours and then cooled to the normal temperature by spreading the soil on the surface of the concrete floor. Each tray was then covered with one layer of newspaper and watered with a fine meshed sprinkler once in a day until emergence. Ten days after sowing when the seedling attained 3 leaf stage, they were transferred to the polybag each 12.75 X 10.15 cm size and filled with potting media comprising soil, composed and sand at the ratio of 3:1:1. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The unit plot size was 5.0 X 1.0 m and the plants were spaced 50 X 50 cm and block to block distance was 1.0 X 0.5-m. Forty five day old healthy seedlings were transplanted in the experimental plots on 26 December 2000. Manures and fertilizers were applied as recommended for chili. Intercultural operation was done as and when required. The data pertaining to the following characters were recorded from randomly selected 5 plants from each plot. The incidence of thrips was calculated and grading was done slightly modified on the basis of mean percentage plant infection as described. Scoring scale of TYLCV of tomato was done with the scale such as 0= No infection = HR; 1 = 1-25 % plant infection = R; 2 = 26-50 % plant infection = MR; 3 = 51-75 % plant infection = MS; 4 = 76-100 % plant infection = S; 5 = 76-100 % plant infection but mild infection = HS. and (S) = Susceptible: 76-100 % infection, but mild to moderate symptoms. The incidence of PVY was recorded as 0-4 scoring scale as 0 = N_o infection = HR; 1 = 1-25% infection = R; 2 = 26-50% infection = MR; 3 = 51-75% infection = MS; and 4 = 76-100% infection = S. Fusarium wilt of tomato, a devastating disease was recorded on 0-3 scale such as 0 = No infection = R; 1 = Leaf yellowing =MR; 2 = Leaf yellowing and plant wilting = MS; and 3 = Plant death = S.

Source of Information: Int. J. Sustain. Crop Prod. 2(6):06-09, 2007

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest incidence was recorded in SP008 (5%) followed by SP002 and SP005. Among the genotypes, 9 were found highly resistant (HR) and 3 resistant to Yellow Leaf Curl Virus. In case of Potato Virus-Y, 9 genotypes showed to be highly resistant, and the rest three were found to be resistant. Among the tested lines, eight were found free from Fusarium wilt and graded as highly resistant (HR) and four genotypes graded as resistant (R).

Knowledge Management: Journal