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

Oviposition Preference of Callosobruchus Maculatus (f.) to Common Pulses and Potentiality of Triflumuron as Their Protectant

M Saiful islam
Department of Zoology, Rajshahi University, Rajshahi 6205, Bangladesh

Fauzia Akhter
Department of Zoology, Rajshahi University, Rajshahi 6205, Bangladesh

Rezina Laz
Department of Zoology, Rajshahi University, Rajshahi 6205, Bangladesh

Selina Parween
Department of Zoology, Rajshahi University, Rajshahi 6205, Bangladesh.

Abstract/ Executive Summary:

Seeds of black grams, lentils, Bengal grams and green peas were soaked separately in aqueous solutions of Triflumuron at doses of 0.0 (control), 0.5, 1.0, 1.5 and 2.0 ppm. Three day-old adults of Callosobruchus maculalus (F.) (Coleoptera: Bruchidae) were allowed to oviposit on air-dried, treated or untreated pulses of each type and dose in 'no-choice' and 'free-choice' tests. Maximum oviposition occurred in Bengal grams (61.00±0.25) and green peas (33.67±0.54) in 'no-choice' and 'free-choice' tests, respectively. The beetles avoided egg laying on lentils. Maximum egg-hatching occurred on black grams (>90%) in both tests. Minimum developmental time was required in the Bengal grams (30±0.5 days in 'no-choice' test and 31.33±1.23 days in 'free-choice' test). No adults emerged from green peas, while 54.79% and 86.15% emergence were recorded from untreated black grams in 'no-choice' and 'free-choice' tests, respectively. Triflumuron reduced egg-laying significantly in green peas, where hatchability also reduced significantly to 35.99% at 2 ppm in 'no-choice' test. Percentage of hatching decreased in all pulses with the increasing doses of triflumuron. No adults emerged from the treated green peas in any test, and at 2 ppm the adult emergence declined to <50% in all pulses. Implications of these results are further discussed.

Keywords: Callosobruchus maculatus, Triflumuron, Seed protectant, Fecundity, Hatchability

Location: Department of Zoology, Rajshahi University, Rajshahi 6205, Bangladesh

Start Date:

End Date:

Program Area: Pest Management

Commodity: Pulses, Insects

Objectives:

To efficacy as a protectant against the pulse beetle reared on four common pulse seeds.

Methodology:

Newly emerged adults of C. maculatus were used for evaluating their oviposition preference on untreated and triflumuron-treated seeds in two sets of experiments detailed below. Required quantities of Triflumuron (common name is Baycidal which is a product of Bayer AG, and contains 25% wettable powder of triflumuron), were dissolved in distilled water and shaken well to obtain doses of 0.0 (control), 0.5, 1.0, 1.5 and 2.0 ppm. Good quality pulses were used after sterilizing at 60ºC in an oven. Fifty seeds of each pulse species were soaked separately in each dose for 30 minutes. The seeds were then removed from the solution and dried in air at room temperatures ranging from 25 to 30ºC. Two experiments were set up on the basis of 'no-choice' and 'free-choice' of the beetles on four different pulse species viz., black grams (Vigna mungo), lentils (Lens esculentus), Bengal grams (Cicer arietinum) and green peas (Pisum sativum) in all five doses. The experiments were conducted at room temperatures (25- 30ºC). Fifty seeds of each of the four pulse species were placed separately in 9-cm diameter Petri dishes. The seeds were arranged in a single layer without any overlapping. Single pairs of 3 day-old adult C. maculatus males and females were released in each Petri dish for egg laying. The beetles were removed after 48 hours. The number of eggs laid, egg-hatchability (%), egg-to-adult developmental period (days) and adult emergence (%) from each pulse seeds were recorded. Fifty seeds of each of the pulse species were placed in a Petri dish (15-cm diameter). Single pairs of 3 day- old adult males and females of C. maculatus were released in the Petri dish and removed after 48 hours. The beetles had unrestricted access to all pulses for egg-laying. Data were recorded as in 'no-choice' tests.

Source of Information: Journal of Bio- Science. Vol. 15, pp: 83-88, 2007

Article Link (Online Journal): J. bio-sci. 15: 83-88, 2007 ISSN 1023-8654 http://www.banglajol.info/index.php/JBS/index

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Finding the present achievement therefore are suggestive of using carefully estimated doses of triflumuron as a surface protectant for pulse seeds against Callosobruchus infestation.

Knowledge Management: Journal