scholarly journals Examination of long-term suppression of aphid density through augmentative release of larvae of flightless Harmonia axyridis (Coleoptera: Coccinellidae) and adults of Aphidius colemani (Hymenoptera: Aphidiinae) onto eggplants in commercial greenhouse, with a combination of sweet alyssum intercropping and brine-shrimp egg provision

2018 ◽  
Vol 60 (0) ◽  
pp. 55-59
Author(s):  
Shuji Kaneko ◽  
Kanako Shirotsuka ◽  
Manabu Shibao
Keyword(s):  
Brine Shrimp ◽  
Harmonia Axyridis ◽  
Aphidius Colemani ◽  
Aphid Density ◽  
Augmentative Release

scholarly journals Long-term effects of chlorantraniliprole reduced risk insecticide applied as seed treatment on lady beetle Harmonia axyridis (Coleoptera: Coccinellidae)

Chemosphere ◽  
2019 ◽  
Vol 219 ◽  
pp. 678-683 ◽  
Author(s):  
Rodrigo L. Oliveira ◽  
Pablo C. Gontijo ◽  
Rafaella R. Sâmia ◽  
Geraldo A. Carvalho
Keyword(s):  
Seed Treatment ◽  
Harmonia Axyridis ◽  
Lady Beetle ◽  
Long Term Effects ◽  
Reduced Risk

Effects of Long-term Experimental Warming on Aphid Density in the Field

2007 ◽  
Vol 80 (2) ◽  
pp. 156-168 ◽  
Author(s):  
Lynn S. Adler ◽  
Perry de Valpine ◽  
John Harte ◽  
Jessica Call
Keyword(s):  
Experimental Warming ◽  
Aphid Density

scholarly journals Effects of feeding on the physiological performance of the stony coral Pocillopora acuta

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yan-Leng Huang ◽  
Anderson B. Mayfield ◽  
Tung-Yung Fan
Keyword(s):  
Brine Shrimp ◽  
Specific Growth ◽  
Day Treatment ◽  
Physiological Performance ◽  
Buoyant Weight ◽  
Recirculating Aquaculture ◽  
Light Levels ◽  
Aquaculture System ◽  
Feeding Regimes

AbstractReef-building corals rely on both heterotrophy and endosymbiotic dinoflagellate autotrophy to meet their metabolic needs. Those looking to culture these organisms for scientific or industrial purposes must therefore consider both feeding regimes and the light environment. Herein the effects of three photosynthetically active radiation (PAR) levels were assessed in fed and unfed specimens of the model coral Pocillopora acuta that were cultured in a recirculating aquaculture system (RAS). Half of the corals were fed Artemia sp. brine shrimp in a separate feeding tank to prevent biofouling, and fragments were exposed to PAR levels of 105, 157, or 250 μmol quanta m−2 s−1 over a 12-h period each day. All cultured corals survived the 140-day treatment, and the physiological response variables assessed-buoyant weight, specific growth rate, linear extension, color, and Fv/Fm-were significantly influenced by feeding, and, to a lesser extent, light. Specifically, fed corals grew faster and larger, and presented darker pigmentation; corals fed at the highest light levels grew at the fastest rate (6 cm year−1 or 175 mg g−1 week−1). Given the high physiological performance observed, we advocate the active feeding of brine shrimp in RAS by those looking to cultivate P. acuta, and likely other corals, over long-term timescales.

scholarly journals Differences in the Development of Internal Reproductive Organs, Feeding Amount and Nutrient Storage between Pre-Diapause and Pre-Reproductive Harmonia axyridis Adults

Insects ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 243 ◽  
Author(s):  
Qiao Gao ◽  
Bing-Xin Wei ◽  
Wen Liu ◽  
Jia-Lu Wang ◽  
Xing-Miao Zhou ◽  
...  
Keyword(s):  
Harmonia Axyridis ◽  
Biocontrol Agent ◽  
Reproductive Organs ◽  
Developmental Trajectory ◽  
Nutrient Storage ◽  
Long Day ◽  
Morphological Differences ◽  
Native Place ◽  
And Storage

Diapause control is one of the successful methods for long-term cold storage of biological control organisms without decreasing their fitness. Sufficient preparation before diapause is essential for successful diapause initiation and maintenance. Harmonia axyridis, an important biocontrol agent in its native place, can enter reproductive diapause for overwintering. However, the key preparatory events before diapause in H. axyridis, such as specific developmental trajectory, timing, and physiological changes, remain unclear. We compared differences in the development of internal reproductive organs, feeding amount and nutrient storage between pre-diapause and pre-reproductive adult H. axyridis which had been reared at 20 °C under a short-day (10L:14D) and long-day (14L:10D) condition, respectively. The results showed that there were obvious morphological differences in internal reproductive organs of diapause and reproductive H. axyridis. The development of internal reproductive organs was suppressed at early adult stage in pre-diapause beetles compared to pre-reproductive beetles. Feeding amount in both pre-diapause and pre-reproductive beetles increased for more than ten days after eclosion. The feeding amount of pre-diapause beetles sharply decreased from the 15th day after eclosion in females and the 14th day after eclosion in males, which implied the initiation of diapause. During the pre-diapause stage, carbohydrates and lipids were mainly accumulated by females, whereas males mainly accumulated carbohydrates. Our results not only provide basic information about the diapause process of pre-diapause stage, but also give tips to better utilization of diapause strategy during mass production and storage of H. axyridis.

Is conspecific substrate marking a long-term external memory of previously colonized overwintering sites in Harmonia axyridis ?

2013 ◽  
Vol 138 (5) ◽  
pp. 338-345 ◽  
Author(s):  
D. Durieux ◽  
B. Fassotte ◽  
M. Vanderplanck ◽  
Y. Brostaux ◽  
C. Fischer ◽  
...  
Keyword(s):  
Harmonia Axyridis ◽  
External Memory

scholarly journals Experimental studies to increase the natural resources of brine shrimp Artemia in hyperhaline reservoirs

2021 ◽  
Vol 937 (2) ◽  
pp. 022073
Author(s):  
L Litvinenko ◽  
A Litvinenko ◽  
E Boyko ◽  
M Korentovich ◽  
P Zenkovich
Keyword(s):  
Incubation Time ◽  
Brine Shrimp ◽  
Laboratory Experiments ◽  
Experimental Studies ◽  
Natural Lakes ◽  
The World ◽  
Optimal Incubation ◽  
Natural Brine

Abstract A brief analysis of the available technologies for growing Artemia in the world and in Russia is given in the paper. The conditions for production of Artemia in natural reservoirs with a local Artemia population are shown. The results of laboratory experiments on reducing the incubation time of cysts to 2-23 hours (instead of the standard 24-48 hours) and the inoculation of nauplii and non-hatched cysts into the brine of natural lakes with salinity of 101, 125, 225 and 333‰ are given in details. The following indicators are analyzed: the rate of hatching during incubation, the rate of hydration of cysts during incubation and dehydration in brine; the survival rate of nauplii in brine, the possibility of hatching nauplii from cysts in brine with different salinity. The results of long-term observations of the survival of Artemia crustaceans in the brine of the lake in the absence of feeding are also presented. It is possible to reduce the incubation time to 6-20 hours is concluded in the paper. The dependence of the duration of incubation of cysts on the temperature, quality of cysts and salinity of natural brine was noted. To determine the optimal incubation time of cysts the formulas for calculating T90 according to the temperature and salinity of brine for cysts of different quality are given.

The contribution of a beneficial insectary plant Scaevola aemula to survival and long-term establishment of flightless Harmonia axyridis in greenhouses

BioControl ◽  
2017 ◽  
Vol 62 (2) ◽  
pp. 221-231 ◽  
Author(s):  
Tomokazu Seko ◽  
Junichiro Abe ◽  
Kazuki Miura ◽  
Mitsuharu Hikawa
Keyword(s):  
Harmonia Axyridis

scholarly journals Long Term Monitoring in Switzerland Reveals That Adalia bipunctata Strongly Declines in Response to Harmonia axyridis Invasion

Insects ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 883
Author(s):  
Marc Kenis ◽  
Saidou Nacambo ◽  
Johan Van Vlaenderen ◽  
Renate Zindel ◽  
René Eschen
Keyword(s):  
Harmonia Axyridis ◽  
Control Function ◽  
Minor Component ◽  
Adalia Bipunctata ◽  
Ecological Niches ◽  
Long Term Monitoring ◽  
A Minor ◽  
The Impact ◽  
Term Monitoring

A long-term monitoring was conducted at 40 sites in four different habitats in north-western Switzerland to observe changes in populations of native ladybirds, following the invasion of the Asian harlequin ladybird, Harmonia axyridis. From 2006 to 2017, the same trees and meadows were sampled at least seven times per year using standard protocols. On 15 broadleaved hedges, H. axyridis quickly became the dominant species, representing 60 to 80% of adult ladybirds collected. It was second in abundance at five pine (Pinus sylvestris) stands and was a minor component of the ladybird complex at five spruce (Picea abies) stands and in 15 meadows. This survey revealed the severe decline of Adalia bipunctata, which was the most abundant native ladybird on broadleaved trees in 2006–2009 and has almost disappeared since 2010. So far, other native ladybirds do not seem to decline significantly, including species occupying the same ecological niches as H. axyridis. The total number of aphidophagous ladybirds did not decline either, suggesting that the biological control function of ladybirds on aphids living in these habitats has not been affected by the arrival of H. axyridis. Recommendations are given to further assess the impact of H. axyridis on native ladybirds and aphids.

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