Differential temperature responses between Plutella xylostella and its specialist endo‐larval parasitoid Diadegma semiclausum – implications for biological control

2021 ◽  
Author(s):  
Leyun Wang ◽  
Kayvan Etebari ◽  
Zihua Zhao ◽  
Gimme H. Walter ◽  
Michael J. Furlong
Keyword(s):  
Biological Control ◽  
Plutella Xylostella ◽  
Diadegma Semiclausum ◽  
Larval Parasitoid ◽  
Temperature Responses

scholarly journals Mating behaviour and egg maturation in Diadegma semiclausum Hellen (Hymenoptera Ichneumonidae)

2009 ◽  
Vol 62 ◽  
pp. 174-178
Author(s):  
D. Khatri ◽  
X.Z. He ◽  
Q. Wang
Keyword(s):  
Reproductive Biology ◽  
Plutella Xylostella ◽  
Mating Behaviour ◽  
Diamondback Moth ◽  
Diadegma Semiclausum ◽  
Larval Parasitoid ◽  
Egg Maturation ◽  
Males And Females ◽  
Sexually Mature

Diadegma semiclausum is an important larval parasitoid of diamondback moth Plutella xylostella Little was known about the reproductive biology of this parasitoid The present study investigated mating behaviour and egg maturation dynamics of D semiclausum in the laboratory at 211C 168 h (lightdark) and 5060 RH Both males and females became sexually mature

scholarly journals Reproductive fitness of Diadegma semiclausum Hellen (Hymenoptera Ichneumonidae) in response to host density

2012 ◽  
Vol 65 ◽  
pp. 142-147
Author(s):  
D. Khatri ◽  
X.Z. He ◽  
Q. Wang
Keyword(s):  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Host Density ◽  
Reproductive Fitness ◽  
Diadegma Semiclausum ◽  
Female Progeny ◽  
Larval Parasitoid

Diadegma semiclausum is an important larval parasitoid of diamondback moth (DBM) Plutella xylostella The present study investigated the reproductive fitness of D semiclausum females in response to host densities of 5 and 30 DBM larvae per cabbage seedling per day Both the number of hosts parasitised and the number of female progeny produced over the life of the parasitoid were significantly greater in the 30 than the 5 host density (hosts parasitised 60131 versus 12015 and female progeny produced 6710 versus 122) (P

Dynamics of diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae), in cabbage under intercropping, biological control and Bt-based sprays

1969 ◽  
Vol 87 (1-2) ◽  
pp. 31-49
Author(s):  
Ángel L. González-Rodríguez ◽  
Raúl Macchiavelli
Keyword(s):  
Biological Control ◽  
Population Dynamics ◽  
Bacillus Thuringiensis ◽  
Field Study ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Cotesia Plutellae ◽  
Larval Parasitoid ◽  
Head Formation ◽  
Companion Crop

A field study (1998-99) was conducted at the Juana Díaz Substation (AESUPR) to determine the population dynamics of Plutella xylostella (L.) in cabbage in a monoculture and in relay-type substitutive dicultures of cabbage/tomato or cabbage/wedelia. In 1998, subplots were created by spraying half of the main plots with Bacillus thuringiensis (Bt)-based products. All treatments, except for the control monoculture, were sprayed with Bt-based products in 1999. Cotesia plutellae Kurjumov, a larval parasitoid of P. xylostella, was released augmentatively for biological control. Tomato, as a companion crop, showed a tendency for reducing P. xylostella densities in cabbage, reduced the levels of C. plutellae parasitism and competed with cabbage, causing fewer and smaller heads. Bt-based sprays reduced P. xylostella densities, but these were at damaging levels at the critical stages of cupping and head formation, thus permitting cosmetic damage to cabbage heads. Cotesia plutellae did not regulate the P. xylostella population, thus resulting in parasitism levels of 65.3 and 11.6% in the unsprayed monoculture in 1998 and 1999, respectively. The legume Crotalaria juncea L. as a border did not improve parasitism by C. plutellae. The interpretation and application of the results are discussed. 

scholarly journals KAIROMON SEBAGAI PEMANDU KEDATANGAN PARASITOID DIADEGMA SEMICLAUSUM HELLEN PADA LARVA INANG

2021 ◽  
Vol 1 (2) ◽  
pp. 63-67
Author(s):  
Fri Maulina
Keyword(s):  
Plutella Xylostella ◽  
Diadegma Semiclausum

Kairomon merupakan suatu zat kimia yang dikeluarkan oleh suatu spesies untuk menarik spesies yang berbeda seperti  larva hama terhadap  parasitoid. Sumber potensial kairomon bisa diperoleh dari kotoran, kelenjar ludah, sutera, kontaminasi tubuh, sekresi makan, dan sekresi pertahanan dari inang. Tujuan penelitian ini adalah untuk mengetahui  keberadaan kairomon pada kotoran larva inang (larva P. xylostella) dan  pengenceran terbaik dalam mengundang kedatangan parasitoid  D. semiclausum.  Pengujian kairomon menggunakan Rancangan Acak Lengkap (RAL), terdiri dari 4 perlakuan dan 7 ulangan.  Perlakuan  yaitu pengenceran kotoran inang pada 10-1, 10-2, (tanpa pengenceran = 100) dan kontrol. Hasil pengujian membuktikan bahwa kotoran larva Plutella xylostella dapat memandu kedatangan parasitoid D. semiclausum  dengan indikator jumlah telur yang diletakkan pada pengenceran kotoran larva 10-1 dan 10-2 dan tingkat parasitisasi pada pengenceran kotoran larva 10-1 dan 10-0.  Kotoran larva  P. xylostella berperan sebagai kairomon bagi  parasitoid  D. semiclausum.    

Effects of Two Cultivated Brassica spp. on the Development and Performance of Diadegma semiclausum (Hymenoptera: Ichneumonidae) and Cotesia vestalis (Hymenoptera: Braconidae) Parasitizing Plutella xylostella (Lepidoptera: Plutellidae) in Kenya

2019 ◽  
Vol 112 (5) ◽  
pp. 2094-2102 ◽  
Author(s):  
Ruth Kahuthia-Gathu ◽  
Stephen T O Othim
Keyword(s):  
Host Plant ◽  
Plutella Xylostella ◽  
Development Time ◽  
Trophic Levels ◽  
Pupal Weight ◽  
Vegetable Production ◽  
Diadegma Semiclausum ◽  
Cotesia Vestalis ◽  
Positive Effects ◽  
And Performance

AbstractThe diamondback moth (DBM), Plutella xylostella L., is the most destructive pest affecting vegetable production in Kenya and around the world. Parasitoids have shown promising results in lowering the pest populations and damage caused by DBM. However, variations in host plant quality have been reported to have bottom-up effects up to the third and fourth trophic levels. We assessed the effects of two cultivated Brassica varieties (cabbage, Brassica oleracea var. capitata L. cultivar ‘Gloria F1’ and kale, B. oleracea var. acephala L. cultivar ‘Thousand headed’) on the development and performance of the specialist pest P. xylostella and two exotic parasitoids Diadegma semiclausum (Hellen) and Cotesia vestalis (Haliday). The exposed larval period of DBM took about 1.5 d longer on kale than cabbage and the total immature development time of both females and males was significantly longer on kale than cabbage. Higher pupal weight and higher fecundity were recorded on DBM fed on kale. Development time of D. semiclausum and C. vestalis was not affected by the host crop as was the parasitism rate of D. semiclausum. Heavier male pupae and larger adults of D. semiclausum, as well as more fecund adults of C. vestalis, were obtained from hosts fed on cabbage. Larger adults of C. vestalis were obtained from herbivores fed on kale. These results show potentially positive effects of host plant allelochemicals that are detrimental to herbivores while promoting parasitoid development and performance, which can be harnessed for the control of DBM.

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