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<title cf:type="text"><![CDATA[Editorial Office of Journal of Environmental Entomology -->Natural enemies and resource insects]]></title>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Investigation on the species of parasitic natural enemies of Drosophila suzukii in Yunnan]]></title>
<link><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901020&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Drosophila suzukii is one of the most important pest insect of grapes, blueberries, bayberries, cherries and other soft fruits, which has attracted attention all around the world.Our study aims to know the species of parasitic natural enemies, distribution and natural parasitism rate of D.suzukii,and Provide scientific basis for the protection and utilization of its natural enemies.In Yunnan Provice, the berry fruits from the host of cultivated and wild host plants were collected widely, brought back to the laboratory and reared in the fruit during 5 to 8 days. The fruit was dissected to pick the pupae of D.suzukii,and collected the parasitic natural enemies, which were identified and recorded the population size parasitism rate to D.suzukii.Our study  showed that total 45 species of berry fruits were investigated, and 15 species among them were damaged by D.suzukii. Bayberry had the highest population of D.suzukii,which reached 96.03 individuals per 100 fruits. Fiveparasitic natural enemies of D.Suzukii were collected, Ganaspis brasiliensis, Asobara sp. and Leptopilina japonica werethe larva parasitoids, Trichopria drosophilaeand  Pachycrepoideus vindemmiae werethe pupa parasitoids. Parasitic wasps had the highest natural parasitism of up to 27.81%.The results showed that G.brasiliensis had the largest population and the most widely distributed.It was the main parasitoids species of D.suzukii in the field.Parasitic natural enemies of D.suzukii reached the peak of emergence within 1~2 weeks after D.suzukii became a pupa.It has good natural control effect on D.suzukii.]]></description>
<pubDate>2019/5/15 12:12:59</pubDate>
<category><![CDATA[Natural enemies and resource insects]]></category>
<author><![CDATA[FANG Yuan, WU Hao, WANG Jin-Xiu, DOU Wen-Jun, ZHANG Xiao-Ming, ZHANG Feng, XIAO Chun，CHEN Guo-Hua]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>FANG Yuan, WU Hao, WANG Jin-Xiu, DOU Wen-Jun, ZHANG Xiao-Ming, ZHANG Feng, XIAO Chun，CHEN Guo-Hua</atom:name>
</atom:author>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The development, fecundity, and functional response of Pachycrepoideus vindemmiae on the pupaeof Drosophila melanogaster]]></title>
<link><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901021&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Pachycrepoideus vindemmiae is a nature enemy against Drosophila suzukii and Drosophila melanogaster.We tested the development, fecundity and life time of Yunnan strain P.vindemmiae on D.melanogaster. In addition, the functional response of P.vindemmiaewas tested on six different host densities (5,10,15,20,25 and 30 pupa of D.melanogaster). The development period from egg to adult of female and male were 16.10 d and 14.67 d, respectively.The average longevity of female adult was 4976 d, the average number of progeny was 93.28 per female, and the proportion of female progeny was 55.76%. The parasitic functional response of P.vindemmiaewas fitted to Holling II type.The curve was described as Na=0.6261 No/ (1+0.0632 No). The maximum number of theoretical parasitism was N amax=9.0171, the maximum number of actual parasitism was 7.00 (20 pupa were provided). The searching efficiency ofP.vindemmiae decreased with the increased host density.We conclude that P.vindemmiaecollected from bayberry has higher fecundity and fitness on D.melanogaster,so it is potential efficient biological control agent against D.suzukii and D.melanogaster.]]></description>
<pubDate>2019/5/15 12:12:59</pubDate>
<category><![CDATA[Natural enemies and resource insects]]></category>
<author><![CDATA[ZHOU Chang-Qing, ZHAN Hai-Xia, XIAO Chun, ZHANG Jin-Ping]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>ZHOU Chang-Qing, ZHAN Hai-Xia, XIAO Chun, ZHANG Jin-Ping</atom:name>
</atom:author>
<guid><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901021&flag=1]]></guid><cfi:id>4</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Effects of temperatures on the predation of Chrysoperla sinica (Neuroptera: Chrysopidae) on Sitobion avenae (Hemiptera: Aphididae)]]></title>
<link><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901022&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To determine the predation capacity of Chrysoperla sinicaon Sitobion avenaeat different temperatures, the agestage two sex life table method was used to analyze the predation of C.sinica on S.avenae under different temperatures (16℃, 19℃, 22℃, 25℃ and 28℃). There had significantly differences on the numbers of S.avenae preyed by 1stinstar larvae under different temperatures, but no significantly differences on the numbers of S.avenae preyed by 2ndinstar larvae.The number of 3rd instar larvae preyed on wheat aphid increased significantly with the increase of treatment temperature.The larvae total predation rate ofC.sinicaon S.avenae had no significant difference under different temperature treatments besides 28℃.The average predation rate in 2nd instar stage was higher than that in 1.st instar, and significantly less than that of 3rd instar larvae.The results of the agestage predation rate showed that the temperature increase shortened the larval development time, but increased its predation ability; although the number of aphid consumed at different temperatures had no significantly difference, the time consumed by the larvae was shortened by the high temperature. Under 22℃,C.sinica had a long female adult longevity (96.63 d), a long spawning duration (55.36 d), a big fecundity ability (310.36 offsprings), and a short mean generation time (T) (48.99 d), all of the parameters showed that the lacewing could be easy to form overlapping generations.The intrinsic rate of increase (r) and the finite rate of increase (λ) showed positive growth trend of C.sinica population.The average predation rate in 2ndinstar stage was higher than that in 1st instar, and significantly less than that of 3rdinstar larvae.These findings show important reference value to releaseC.sinica as biological control strategy on S.avenae in spring.]]></description>
<pubDate>2019/5/15 12:12:59</pubDate>
<category><![CDATA[Natural enemies and resource insects]]></category>
<author><![CDATA[XU Le-Yuan, LIU Shao-Ye, YU Jin-Feng, XU Yong-Yu, CHEN Zhen-Zhen]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>XU Le-Yuan, LIU Shao-Ye, YU Jin-Feng, XU Yong-Yu, CHEN Zhen-Zhen</atom:name>
</atom:author>
<guid><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901022&flag=1]]></guid><cfi:id>3</cfi:id><cfi:read>true</cfi:read></item>
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<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[Combination effects of three neonicotinoid pesticides on physiology and survival of honey bees （Apis mellifera L.）]]></title>
<link><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901023&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[To investigate combination effects of three common neonicotinoid pesticides thiamethoxam, imidacloprid and clothianidin on the activities of acetycholinesterase (AChE) and glutathione S.transferases (GSTs), and the survival in honey bees (Apis mellifera L.). The acute toxicity of three neonicotinoids pesticides to honey bees was tested by “oralfeeling tube” method; The mortalities, AChE and GSTs activities of honey bees was measure at 48 h after  bees were exposed to LD10 of thiamethoxam, imidacloprid and clothianidin, and binary mixtures of these pesticides.The mortalities were significantly increased by binary mixtures of three pesticides (P<0.05). The synergistic effect of thiamethoxam and imidacloprid, or thiamethoxam and clothianidin could increase the toxicity to bees（Q＞1.15). The activities of AChE in pesticide treatment groups were all significantly higher than control (P<0.05). Binary mixtures of thiamethoxam and imidacloprid, or thiamethoxam and clothianidin could significantly increased the activities of AChE (P<0.05). The activities of GSTs were distinctly inhibited by the mixture of thiamethoxam and clothianidin (P<0.05); however, there were no significant differences in the activities of GSTs in other pesticide groups.Combined toxicity was detected from mixtures of thiamethoxam and imidacloprid, or thiamethoxam and clothianidin showed synergistic interaction.Binary mixtures of neonicotinoids showed different physiology changes than single neonicotinoids in honeybees.These results are important for exploring  impact of pesticides on the health of honey bees and provide theoretical basis in honey bees protection.]]></description>
<pubDate>2019/5/15 12:12:59</pubDate>
<category><![CDATA[Natural enemies and resource insects]]></category>
<author><![CDATA[WANG Yu-Fei, SHI Teng-Fei, XU Sheng-Yun, Sawyer Burton, HOU Chao, ZHU Yu-Jie, YU Lin-Sheng]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>WANG Yu-Fei, SHI Teng-Fei, XU Sheng-Yun, Sawyer Burton, HOU Chao, ZHU Yu-Jie, YU Lin-Sheng</atom:name>
</atom:author>
<guid><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901023&flag=1]]></guid><cfi:id>2</cfi:id><cfi:read>true</cfi:read></item>
<item>
<title xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="text"><![CDATA[The effect of Artemisia argyiessential oil on the Trichogramma ostriniae and their combined effect on the Corcyra cephalonica ]]></title>
<link><![CDATA[http://hjkcxb.alljournals.net/hjkcxben/ch/reader/view_abstract.aspx?file_no=201901024&flag=1]]></link>
<description xmlns:cf="http://www.microsoft.com/schemas/rss/core/2005" cf:type="html"><![CDATA[Trichogramma ostriniae is an important natural enemy in biological control.In order to find out the effect of Artemisia argyiessential oil on T.ostriniaeand their combined effect on the control of Corcyra cephalonica，the fumigation, contact and repellent activities of A.argyiessential oil on T.ostriniae were studied, as well as the combined action of A.argyiessential oil and T.ostriniae on the C.cephalonica. The results showed that the A.argyi essential oil had good fumigation and contact activities on T.ostriniae.The emergence ratios of T.ostriniae which parasitized in the C.cephalonica eggs were 56.67%, 49.33%, 39.33%, 33.33%, 26.00% and 14.67% respectively, after 72 h fumigation with 0.1,0.2,0.3,0.4,0.5,0.6 μg/cm3 A.argyi essential oil, and the emergence ratios after 72 h contacting treatment with 100, 200, 300, 400, 500, 600 mg/L  A.argyi essential oil were 58.00%, 45.33%, 38.00%, 28.67%, 18.00% and 6.00%, all the results showed significant difference (at 5% level) to the control.The emergence rate of T.ostriniaedecreased with the increase of the concentration of essential oil.At concentration of 300 mg/L the A.argyiessential oil displayed 79.05% repellent ratio on T.ostriniae, and the repellent activity decreased while the distance and time interval of the essential oil treatment were added.As for the combined effect of both A.argyiessential oil and T.ostriniae, the best treatment was applying T.ostriniaefirstly and 24hourlater A.argyiessential oil, which could get 96% C.cephalonica mortality.]]></description>
<pubDate>2019/5/15 12:12:59</pubDate>
<category><![CDATA[Natural enemies and resource insects]]></category>
<author><![CDATA[YANG Xiao-Rong, WANG Zhi-Nan, JIANG Hao-Lin, TIAN Yong-Qing, ZHANG Pei-Wen, ZHANG Zhi-Xiang]]></author>
<atom:author xmlns:atom="http://www.w3.org/2005/Atom">
<atom:name>YANG Xiao-Rong, WANG Zhi-Nan, JIANG Hao-Lin, TIAN Yong-Qing, ZHANG Pei-Wen, ZHANG Zhi-Xiang</atom:name>
</atom:author>
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