One dominant gene conferring the resistance to the leafminer, Liriomyza trifolii(Burgess) Diptera: Agromyzidae in melon (Cucumis melo L.)

The line Nantais Oblong, a melon of Charentais type, was shown to be a source of resistance by antibiosis to the leafminer, Liriomyza trifolii (Burgess), Diptera, Agromyzidae. We studied the genetic control of this resistance in F2 and back-cross progenies from the cross between Nantais Oblong and Védrantais, a Charentais line susceptible to the leafminer. Tests were carried out on young plants in plastic cages with controlled infestation. Complete mortality of the L. trifolii larvae was used as indicator of plant resistance. Segregation ratios were consistent with monogenic dominant control of the resistance. The symbol Lt for Liriomyza trifolii resistance is proposed.     

四种实蝇幼虫蛋白质电泳分析初报

用SDS-聚丙烯酰胺凝胶电泳方法,区别寡毛实蝇属(Dacus)的两个亚属(Zeugodacus和 Bactrocera)和4种实蝇幼虫即南瓜实蝇 Dacus(Zeugodacus)tau,瓜实蝇 Dacus(Zeugodacus)cuccurbitae,桔小实蝇 Dacus(Bactrocera)dorsalis 和番石榴实蝇 Dacus(Bactrocera)correctus,结果显示,两个亚属和4种幼虫可用此法分开.     

Dual ecosystem services of syrphid flies (Diptera: Syrphidae): pollinators and biological control agents

With increasing worldwide pressure on bee pollinator populations and an increase in insecticide resistance amongst pest insects, there is a growing need for diversification of pollinator and pest control systems. Syrphid flies (Diptera: Syrphidae) contribute ecosystem services to agroecosystems through their supporting roles as crop pollinators and predators of pests. Adult syrphids are important pollinators with high floral visitation rates and pollen carrying capacity, while predatory syrphid larvae are natural biological control agents, reducing aphid populations in both field and laboratory conditions. The present challenge is to determine whether syrphid flies have the potential for application as pollinators and in integrated pest management schemes as biological control agents. Currently, there are gaps in research that are hindering the use of syrphids as dual service providers. Such gaps include a lack of knowledge of syrphid floral preferences, the role and viability of adult syrphids as pollinators in natural and agro‐ecological pollinator networks, and the predatory efficiency of larvae in field and glasshouse conditions. By reviewing relevant literature, we demonstrate syrphid flies have the potential to be used as pollinators and biological control agents. © 2020 Society of Chemical Industry     

柑桔大实蝇（Tetradacus citri Chen）耐寒及滞育性研究

在室内条件下，柑桔大实蝇呈现较强的抗寒能力；在０℃条件下，少数幼虫可成活２９天，多数可成活２０天以上；在３℃以上时，幼虫死亡率仅为３％－７％，９３％以上的幼虫能完成化蛹，蛹的抗寒能力较幼虫弱，在３℃处理３０天，蛹全部死亡；６℃处理３０天，２６．６％的蛹能忌化。柑桔大实蝇滞育性强，以蛹为滞育虫态；６℃处理３０天即可解除滞育。     

新疆蔬菜斑潜蝇发现两种寄生蜂

新疆为害蔬菜的斑潜蝇发现两种寄生蜂--西伯利亚离颚茧蜂和圆形赘须金小蜂.后者数量不多,而前者是当地的优势寄生蜂,其寄生率常随作物、季节、环境等因素而变化,化防的影响更大. 西伯利亚离颚茧蜂在寒冷的乌鲁木齐可在不加温温室土中越冬.     

云县地区实蝇类害虫的初步调查

2008年采用性诱剂诱捕法对云县地区实蝇类害虫进行了调查,并对实蝇优势种种群动态进行了分析。结果表明,实蝇种类共有8种,其中优势种为橘小实蝇、黑漆实蝇和南瓜实蝇;实蝇在云县地区为季节性发生,冬季诱捕不到实蝇;高峰期出现在7月或8月。     

不同方法对杨梅园果蝇田间诱集防治效果比较

果蝇是近年为害杨梅Myricarubra最为严重的害虫。其繁殖周期短,通常1周左右即可繁殖1代,且成虫寿命期长,杨梅成熟季节果园内气候条件非常适合果蝇的生存和繁殖。果蝇主要为害成熟杨梅果实,雌虫将卵产于杨梅果实中,卵孵化后幼虫在果实内蛀食,造成果实表面凹凸不平,果汁外溢,品质变劣,严重影响产品的鲜销和深加工。     

美洲斑潜蝇在忻定盆地的发生及综合治理

关洲斑潜绳(Liriomyza Sativae Blanchard),1997年传入山西忻州市忻定盆地,以后相继分布于全市所辖县(市)。据3年观察年生7～8代,4月下旬至5月上旬由温室迁出露地,9月下旬至1O月上旬从露地进入温室,温室繁殖代数为2～3代,露地为5代。危害高峰期3个,1～2月温室高峰期;5月上旬至6月上旬为露地第一高峰期;7月下旬至8月下旬为第二高峰期。这3个高峰期危害的主要作物有5科18种,且豆类>瓜类>茄科>十字花科。为控制其危害提出一道防线、二期控制的策略。一道防线是加强植物检疫,二期控制是越冬期控制温室虫源,高峰期统防统治,压低虫量,减少损失。     

防治美洲斑潜蝇药效试验

试验表明,1．8％爱福丁,48％乐斯本,1％增效7051生物杀虫素,40％绿菜宝4种杀虫剂对美洲斑潜蝇均有良好的防治效果。推广剂量以1．8％爱福丁3000倍;48％乐斯本900～1200g／hm2;1％增效7051生物杀虫累2000倍;40％绿菜宝1350g／hm2为宜     

柑桔大实蝇综合防除技术研究

为了探讨柑桔大实蝇一整套综合配套防除技术,进行了综合防除技术研究。采用措施①柑橘果园土壤药物处理,杀死羽化后出土的成虫;②果园内悬挂糖酒醋液塑料瓶,诱杀大实蝇成虫;③化学防治大实蝇成虫;④9～10月摘除蛆果及拾净落地果,集中坑埋处理。2008年示范总体防效达96.7%。