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 Temperature on the Predator, Xylocoris Flavipes (reuter) (hemiptera: Anthocoridae) Feeding on Cryptolestes Pusillus (schon.) (coleoptera:cucujidae)

M. M. Rahman
Lecturer
Department of Zoology, Mollah Azad Memorial College, Atrai, Naogaon, Bangladesh

W. lslam
BCSIR Laboratories, Rajshahi, Bangladesh

K. N. Ahmed
Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

Xylocoris flavipes (Reuter) is one of the dominant predators of many stored product insect pest including Cryptolestes pusillus. The influence of temperature on predator development, survival and some selected life history parameters was determined. Eggs laid/female (27.27±2.52) and egg hatching rate (%) (88.25±2.19) were highest at 30°C and lowest at 20°C (5.43±1.19 and 30.79±4.63%) respectively but no eggs laid at 15°C. Mortality among immature stages (%) was highest (51.71±1.48) at 35°C and lowest (24.25c±1.14) at 25°C. Developmental times decreasing with the increasing of temperature. Maximum numbers of progeny/female/day (3.55±0.76) were produced at 25°C and minimum (0.83±0.04) were at 20°C.The sex ratios (% female) of X. flavipes were 47.04, 56.68, 51.66 and 50.07 for 20,25,30 and 35°C respectively. Survivorship of ovipositing females was highest at 25°C but lowest at 35°C respectively.

Keywords: Xyiocoris flavipes, Cryptoiestes pusillus, Life history, Temperature, Developmental time

Location: Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

Start Date:

End Date:

Program Area: Pest Management

Commodity: Insects

Objectives:

To find out the effect of temperature on the predator, xylocoris flavipes feeding on crytolestes pusillus.

Methodology:

The test insect, C. pusillus and the predator, X. flavipes were collected from the stock cultures maintain in the Control Temperature (CT) room, Integrated Pest Management (IPM) Laboratories, Institute of Biological Sciences, Rajshahi University, Bangladesh since ten years. Newly emerged healthy and mated female predators were introduced into a small glass vials (4.5 x1.1 cm) containing 15 larvae of C. pusillus (16-20- days-old) and kept at 15°C in an incubator for oviposition up to 24 hours. The mouth of the vial was covered with cotton. After 24 hours, the females were removed and the eggs of the predator were kept at the same incubator for further development and the predators were again introduced for oviposition. This procedure was continued till the death of the female predator. The same procedures were conducted at 20, 25, 30 and 35°C. All the experiments were replicated 5 times. The data on the effects of temperature on eggs laid per female, hatching rate (%), mortality among immature stages (%), developmental time and female longevity of X. flavipes at five different temperature levels were also noted. The data were analyzed by analysis of variance (ANOVA).

Source of Information: Journal of Bio- Science. Vol. 15, pp: 41-46, 2007

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In the present experiment, longevity of individual adult female was highest (12.25 days) at 25^o C and lowest (2.23 days) at 15⁰C. Mean oviposition period was also highest (10.91 days) at 25^o C but lowest (1.55 days) at 35^oC. The life-span and oviposition period of X. flavipes were maximum at 20^oC but the maximum rate of oviposition occurred in temperatures of 25 and 30⁰C that are in accordance with present results. The adult longevity of P. casei was strongly affected by temperature, decreasing from 20.5 d at 15^oC to 6.6 d at 32^oC. That is more or less similar to the present findings.

Knowledge Management: Journal