ZANG , Lian-Sheng

Tomato pinworm, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is the major pest of tomato crops in Pakistan. Insecticides are commonly used for the management of this insect-pest. To develop a better insecticide resistance management strategy and evaluate the risk of resistance evolution, a field collected population of the tomato pinworm...

The Asian corn borer (ACB), Ostrinia furnicalis, is a serious corn pest in south-east Asia, causing huge economic losses every year. Trichogramma dendrolimi and Trichogramma ostriniae, two egg parasitoids, have previously been identified as key biological control agents. To determine the age impact of ACB eggs on their effective biocontrol...

Abstract The bean flower thrips, Megalurothrips usitatus (Bagnall) is an economically important insect pest of cowpea, Vigna unguiculata (L.) Walp in south China. Spinetoram is a newly available commercial active ingredient in the spinosyn mode of action group of insecticides that has been recommended for thrips management in China. In this...

Trichogramma parasitoids are biological control agents of a large number of lepidopterous pests. Mass production of these Trichogramma parasitoids is carried out on different factitious host eggs where the cost for mass rearing is high and the production efficiency is low. Therefore, efficient means and techniques for mass production of these...

BACKGROUND Encarsia formosa Gahan is the most important parasitoid exploited for the control of whitefly pests of vegetable crops. However, the non-target effects of recently developed insecticides for controlling whiteflies toward this biocontrol agent is little documented. Here we evaluated the susceptibility of E. formosa adults and...

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The oriental armyworm Mythimna separata (Walker) is a major cereal crop pest, causing severe economic losses worldwide every year. Yet, few studies documented the biological control of M. separata using natural enemies such as egg parasitoids of the genus Trichogramma. To evaluate the possibility of biological control of M. separata eggs at...

Background Spodoptera frugiperda, a major migratory and invasive pest, inflicts significant yield loss on rice and maize in China. As part of an integrated pest management system, biological control agents can be used against S. frugiperda , especially egg parasitoids. However, limited evidence exists regarding the combined and persistent...

he Asian corn borer (ACB), Ostrinia furnacalis, is a serious maize pest in Southeast Asia, responsible for substantial economic losses to the maize crop every year. To establish insect biocontrol programmes, it is crucial to determine the ideal numbers and developmental stage of natural enemies to release. The purpose of the present study was...

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The fall armywonn (FAW) Spodoptera frugiperda (Smith) is a major agricultural pest in Americas, Africa and Asia. Egg masses are covered with scale layers and the various scale layer thicknesses of these masses can affect parasitoids efficiency. The present study aimed to determine dynamics of the scale thickness on egg masses and its effect on...

The age ofTrichogrammaparasitoids could influence biological traits which are of great importance for effectiveness of mass rearing systems. Recent studies demonstrated thatTrichogramma ostriniae(TO) could parasitizeAntheraea pernyieggs through multiparasitism along with other Trichogrammaspecies, although few adults could emerge successfully....

Autoparasitoids are important biocontrol agents for controlling hemipteran pests. Females of these wasps lay fertilized eggs in whitefly nymphs (primary host) which develop as females. The males develop as hyperparasitoids from unfertilized eggs on conspecific or other primary parasitoid species (as secondary hosts). To date, the effects of...

The fall armyworm (FAW) is native to the Americas. It has invaded more than 100 countries worldwide since its first observation in West Africa in 2016. FAW is a highly polyphagous pest species, feeding on more than 350 plants species, including important staple and fiber crops. FAW has developed resistance to all chemical families and its...

Diapause variation is a key factor affecting the development and success of parasitoids employed as biological control agents. Trichogramma dendrolimi Matsumura is mass-reared for biocontrol purposes in several countries around the world. Here we investigated the rate of diapause induction in three populations of T. dendrolimi from different...

Parasitoids can utilize the nutrition of host eggs to culture their own offsprings. Host qualities, including size, age, and species, influence parasitism preference and fitness of the parasitoid offsprings. However, an interesting question here is whether the parasitoids have the ability of recognizing fertilized and nonfertilized host eggs....

The fall armyworm (FAW), Spodoptera frugiperda (J.E. Smith), has become an international pest with its ability to spread rapidly. The FAW has successfully invaded Africa, Asia, and Australia, and recently China. It has become a serious threat to food security as a major pest of cereals and other crops. Trichogrammatid parasitoids are the...

BACKGROUNDTrichogramma dendrolimi Matsumura is widely used as a biological control agent for control of lepidopteran agricultural pests in China and can be successfully reared using the large eggs of the Chinese silkworm, Antheraea pernyi. In this study, biological parameters of diapaused, non-diapaused, and cold-stored T. dendrolimi were...

Trichogramma parasitoids are important biological control agents for insect pest management. However, efficient means for mass production of Trichogramma parasitoids are needed, particularly for T. ostriniae, which often fail to form emergence holes on host eggs of Chinese oak silkworm, Antheraea pernyi, because of the hard chorion. In the...

The Japanese giant silkwormCaligula japonicaMoore is an emerging defoliator pest of forest and fruit trees, causing severe economic losses in East Asia. To identify biological control agents for this pest, we comparatively evaluated six indigenous eupelmid egg parasitoids (Anastatus fulloi,A. gansuensis,A. japonicus,A. meilingensis,Mesocomys...

Chouioia cunea Yang (Hymenoptera: Eulophidae) has been widely used for biological control of the fall webworm, Hyphantria cunea (Drury) (Lepidoptera: Arctiidae), in China. The yellow mealworm, Tenebrio molitor L. (Coleoptera: Tenebrionidae), an important resource insect species distributed worldwide, is considered to be a potential alternative...