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, (reuter) (hemiptera: Anthocordiae) Feeding on Cryptolestes Pusillus (schon.) (coleoptera: Cucujidae)

M M Rahman1
Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

W Islam
Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh

K N Ahmed
BCSIR Laboratories, Rajshahi, 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 (27.27Â±2.52) and egg hatching rate (%) (88.25Â±2.19) were highest at 30Â°C and lowest at 20Â°C (5.43Â±1.19 and 30.79Â±4.63%) respectively but no eggs laid at 15Â°C. Mortality among immature stages (%) was highest (51.71Â±1.48) at 35Â°C and lowest (24.25cÂ±1.14) at 25Â°C. Developmental times decreasing with the increasing of temperature. Maximum numbers of progeny/female/day (3.55Â±0.76) were produced at 25Â°C and minimum (0.83Â±0.04) were at 20Â°C.The sex ratios (% female) of X. flavipes were 47.04, 56.68, 51.66 and 50.07 for 20, 25, 30 and 35Â°C respectively. Survivorship of ovipositing females was highest at 25Â°C but lowest at 35Â°C respectively.

Keywords: Xylocoris flavipes, Cryptolestes pusillus, Life history, Temperature, Developmental time

Location:

Start Date:

End Date:

Program Area: Pest Management

Commodity: Predator

Objectives:

Several workers have described the effects of constant temperature on the life history parameters of different hemipteran predators (Arbogast 1975, Press et al. 1976, Parajulee et al. 1995, Russo et al. 2004, Herrera et al. 2005). But no information on the impact of constant temperature of X. flavipes on C. pusillus is available. This led to the present study.

Methodology:

The test insect, C. pusillus and the predator, X. flavipes were collected from the stock cultures maintained in the Control Temperature (CT) room, Integrated Pest Management (IPM) Laboratories, Institute of Biological Sciences, Rajshahi University, Bangladesh for ten years. Newly emerged healthy and mated female predators were introduced into a small glass vials (4.5 ×1.1cm) 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 analyses of variance (ANOVA).

Source of Information: J. bio-sci. 15: 41-46, 2007

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Mortality among immature stages (%) was highest (51.71Â±1.48) at 35Â°C and lowest (24.25cÂ±1.14) at 25Â°C. Developmental times decreasing with the increasing of temperature.

Knowledge Management: Journal