Influence of Temperature on Some Biological Characteristics of <I>Trichogramma evanescens</I> (Westwood) (Hymenoptera:Trichogrammatidae) on the Egg of Lesser Date Moth <I>Batrachedra amydraula</I> Meyrick

Abstract

The egg parasitoids Trichogramma spp. were used in a large scale application in different agriculture systems and the species Trichogramma evanescens (Westwood) showed a very promising results when used against lesser date moth Batrachedra amydraula Meyrick (Lepidoptera: Cosmopterygidae). The efficiency of the parasitoids is affected by many environmental factors including temperature. The effect of different temperature regimes on some biological characteristics of T. evanescens was investigated when reared on the egg B. amydraula under laboratory conditions. The longest life span was 35 days recorded at 15°C while the shortest one was 7 days at 33°C. The optimum temperature for the development of this parasitoid ranged between 22 and 27°C. The upper development threshold temperature was 38.4°C and the lower was 11.14°C. Results also showed that the highest parasitism rate was 94.4% recorded at 25±2°C. Adult emergence and female longevity were also influenced by temperature. The feasibility of the results in mass production and the use of the parasitoid for the control of lesser date moth also discussed.

A New Strategy for Controlling Three Devastating Pests Attacking Date Palm Plantations in El Bahariya and Siwa Oases, Egypt Through Using a Special Group of Natural Enemies

“…Several authors stated that environmental conditions have great influence on the natural enemies' performance, mainly temperature. Mohammad et al (2015) reported that the influence of temperature on the biological performance of In conclusion, results of the present study proved that using a group of natural enemies that attack different stages during pest's life cycle, is a competent control strategy. Biological agents are promising tools that can be used in integrated pest management programs to control the lesser date moth, the greater date moth and the pomegranate butterfly in Egypt, especially in protected areas where using pesticides may cause problems.…”

A new strategy for controlling three devastating pests attacking date palm plantations in El Bahariya and Siwa Oases, Egypt,

“…Several authors stated that environmental conditions have great influence on the natural enemies' performance, mainly temperature. Mohammad et al (2015) stated that the influence of temperature on the biological performance of Trichogramma parasitoid in laboratory and in the surrounding environment should be taken into consideration. Alrubeai, (2017) commented that in stability in climate conditions towards the extreme, especially increasing in temperature and decreasing in relative humidity, is considered a big challenge to biological control programs.…”

“…It was found in the literature that most of the work done concerning the lesser date moth was mainly related to T. evanescens. Mohammad et al, (2015) believed that T. evanescensis an effective natural enemy against the lesser date moth in Iraq. Moreover, Ali et al, (2004) remarked that using T. evanescens confirmed the efficacy of such good bio-rational agent to reduce the rates of infestations of lesser date moth in date palm orchards in El-Bahriya Oasis.…”

The effect of different constant temperatures on biological characteristics and life table parameters of Trichogramma bourarachae Pintureau and Babault, 1988 (Hymenoptera: Trichogrammatidae)

“…Climatic conditions play a principal role in shaping the e cacy of Trichogramma spp. in pest management; with temperature attending as the principal abiotic factor that exerts a noticeable in uence on various biological and behavioral characteristics of these poikilothermic parasitoids (Iranipour et al 2009; Ksentini et al 2011;Foerster et al 2014;Mohammad et al 2015). The suitability of Trichogramma species/strains as biocontrol agents depends on their ability to tolerate and adapt to a broad spectrum of temperature conditions (Yuan et al 2012).…”