Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Effect of Various Cereals on the Development of Corcyra Cephalonica (stainton) and Its Egg Parasitoid Trichogramma Chilonis (ishii)

M. Nasrin
Dept. of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706, Bangladesh.

M. Z. Alam
Dept. of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706, Bangladesh.

S. N. Alam
Entomology Division, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh.

M. R. U. Miah
Dept. of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706, Bangladesh.

M. M. Hossain
Dept. of Horticulture, BSMRAU, Gazipur-1706, Bangladesh.

Abstract/ Executive Summary:

Eight types of cereals viz., wheat grain, chopped wheat, paddy grain, rice grain, maize grain, chopped maize, rice bran, mixture of rice bran and chopped rice were fed to observe the development parameters like egg, larva, pupa and adult stages of Corcyra cephalonica (stainton) for three consecutive generations. The parasitism efficiency of Trichogramma chilonis (Ishii) was also evaluated on the resultant host eggs of C. cephalonica. The C. cephalonica revealed the highest number of eggs (115.6 female¹), higher hatchability (92.9%), extented larval duration (45.9 days), increased larval weight (0.058 gm), survival rate (88.3%), adult emergence rate (93.5%), and male and female longevity (7.7, 7.2 days respectively) when they were reared on chopped wheat. On the other hand, the lowest number of egg was found on paddy husk (29.2 female^-1). The lowest hatchability (45.6%), larval duration (45.9 days), larval weight (0.029gm), and survival rate (38.2%), pupal duration (17.9 days) adult emergence (42.0%), male and female longevity (4.8 and 4.7 days respectively) were found on paddy husk. The effect of food materials also reflected on the parasitism efficiency of the egg parasitoid T. chilonis. The highest percent egg parasitization was done by the T. chilonis on the host eggs, reared on chopped wheat (94.8±0.07%) followed by wheat grain (82.5±0.08%) and chopped maize (73.8±0.09%). On the other hand, the lowest parasitism was obtained when the larvae were reared on paddy husk (42.2±0.14 %) and paddy grain (48.8±0.05 %).

Keywords: Cereals, Development, Parasitism

Location: IPM laboratory of the Entomology Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur

Start Date: 00-07-2008

End Date: 00-05-2009

Program Area: Food Safety and Security

Commodity: Rice, Wheat, Insects

Objectives:

To select some cheaper and cost effective food material(s) which can ensure proper development of C. cephalonica and production of its significant number of eggs for successful rearing of the egg parasitoid, Trichogramma spp.

Methodology:

This study was carried out in the IPM laboratory of the Entomology Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during July 2008 and May 2009. For constant supply of test insects and to avoid the effect of previous food, separate stock cultures of C. cephalonica were used. Five kg of wheat poured into boiled water and left for 2-3 minutes. Then the treated wheat was kept in steel trays (50 cm × 60 cm), each tray containing 2.5 kg wheat and 1 gm C. cephalonica egg and kept for 5-6 days untouched. After that requisite quantity of water was added and mixed properly with gentle stirring. After 22-25 days, C. cephalonica infested wheat was placed in mass rearing chamber for adult emergence. From the insect mass rearing chamber C. cephalonica adults were collected for two studies. Eight types of cereals : wheat grain, chopped wheat, paddy grain, rice grain, maize grain, chopped maize, rice bran, and mixture of rice bran and chopped rice were taken in separate plastic pots (500 gm for each) after sterilization. In each pot, 50 eggs of C. cephalonica were spread over on 500 gm cereals and kept in ambiant temperature of 26.0±2.0°C in the laboratory. The mouths of the pots were covered with mosquito net. The pots were checked regularly to observe larval emergence, growth period, duration of pupa and adult. Each plastic pot containing host insect with a single cereal was considered as one treatment replication. There were three replications per treatment and the experiment was set in completely randomized design. Data on the duration of different development parameters viz., egg, larva, pupa and adult stages were measured for consecutive three generations. Eggs were collected from the reared moth population grown on different cereals and these were parasitized by egg parasitoid in the following means: Paper strips with host eggs were made to use them in the present study. For making the egg strips the material like, i) paper strip (10 cm × 1 cm) with different colours (yellow, red, blue ) and labeling, ii) acacia powder of Acacia arabica (LAM), iii) distilled water, iv) small petri dish, and v) dropper are required. At first 10% acacia gum was prepared in a small petridish by mixing acacia powder and distilled water. Mixing of water was done with dropper to maintain the proper dilution of the gum to hold the host eggs firmly with the paper strips. To make the host egg strips, a small amount of acacia glue was taken by finger and smeared on the front side of the labeled paper strip. Previously counted 100 eggs were placed carefully on the glued portion of the paper strip to have a single layer of eggs on the strips. After preparing the strips, it was labeled with date, host name, parasitoid name and number of eggs per strip. The parasitism efficacy of T. chilonis was evaluated on the resultant host eggs of C. cephalonica. For the parasitization, one host egg strip, containing 100 eggs of the host and one T. chilonis pupae strip were placed together in individual test tube. Strips with T. chilonis pupae ready to emerge were taken from the already reared colony of T. chilonis. A strip containing 100 pupae of Trichogramma / strip of C. cephalonica eggs were placed in the test tube. The test tubes, each containing one host egg strip and one T. chilonis pupae strip were then placed in the parasitization chamber after proper labeling with date, number of eggs, host name and parasitoid name. In the parasitization chamber, two third portions of the test tubes were covered by black cloths except the eggs which were placed for the parasitization to provide enough light for frequent movement of Trichogramma. Data on parasitism efficacy of T. chilonis attacking resultant host eggs of C. cephalonica deposited on different cereals were collected. Percent egg parasitism and percent emergence of T. chilonis were calculated. Statistical analysis Data were analyzed by following MSTAT-C program. The mean values were separated by DMRT test (p<0.05).

Source of Information: Bangladesh J. Agril. Res. 41 (1): 183 - 194 , March 2016, ISSN 0258 - 7122 (Print), 2408 - 8293 (Online)

Article Link (Online Journal): DOI: http://dx.doi.org/10.3329/bjar.v41i1.27683

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The present study revealed that chopped wheat was the most preferred food. On the other hand, both paddy grain and paddy husk were the most non-preferred food items and these might be poor in quality for development of host eggs, which in turns invited less number of parasitoids female than the most preferred quality food like chopped wheat.

Knowledge Management: Journal