四种毒饵对红火蚁的田间防治效果评价

采用工蚁诱测法和挖巢观察法评价了4种国产毒饵对红火蚁Solenopsis invicta的田间防治效果。结果表明,氟虫胺、胺菊酯、苯氧威、多杀霉素4种毒饵处理后,红火蚁工蚁诱集百分率均明显降低,处理5d后氟虫胺、胺菊酯的工蚁诱集率为0,而多杀霉素处理10d后诱集率为0。施药后25d4种毒饵处理活动蚁巢减退率分别为100%、100%、50%和71.4%,工蚁减退率分别为100%、100%、92.7%和100%。处理6周后蚁群级别分别降低了100%、100%、83.3%、73.0%。     

几种药剂对苹果果实轮纹病的田间防效研究*

 比较了5种不同复配剂对苹果果实轮纹病的防效,结果表明:在田间推荐使用浓度下,5种药剂对苹果果实轮纹病均有较好的防控效果。70％福美双·甲基硫菌灵可湿性粉剂700倍液、600倍液,32.8%苯醚甲环唑·多菌灵可湿性粉剂2000倍液、1500倍液, 30％多菌灵·戊唑醇可湿性粉剂800倍液、55%甲硫·锰锌可湿性粉剂600倍液,6％福·戊可湿性粉剂300倍液采收期和贮后30 d防效均在80%以上;而30％多菌灵·戊唑醇可湿性粉剂1000倍液、55%甲硫·锰锌可湿性粉剂800倍液,6％福·戊可湿性粉剂400倍液在采收期和贮后30 d防效稍低但均在75%以上。     

Differential response of male and female Diabrotica speciosa (Coleoptera: Chrysomelidae) to bitter cucurbit-based toxic baits in relation to the treated area size

Cucurbitacin-rich extracts are phagostimulants for both male and female Luperini, but field trials reveal that males are far more attracted to them than females. The sex ratio and number of beetles killed by an application of cucurbitacin-based toxic baits was assessed at two different scales: small areas of 100 m², and a larger area of 10,000 m². The small area bait applications killed mostly males (95.2%), but the 1-ha treated plot showed a lower sexual bias (57% male). An earlier study indicated point sources (sticky traps) attracted only males. Results indicate that the distance attraction to bitter cucurbit extracts is almost exclusive to males, but the wide dispersal of a toxic bait based on them should promote encounter and control of both sexes within the treated area. No significant non-target effects were observed.     

Spinosad bait sprays against the olive fruit fly (Bactrocera oleae (Rossi)): effect on the canopy non-target arthropod fauna

Abundance and diversity of arthropods were compared in olive trees treated against the olive fruit fly with spinosad bait sprays and an untreated control, paying special attention to predators and parasitoids. Spinosad bait sprays did not reduce the abundance and diversity of arthropods as a whole in the canopy. However, principal response curve analysis revealed a significant deleterious effect of the treatments on natural enemies in the last of the three years of study. The most affected taxa were Anthocoridae (especially Orius spp.) and Aphelinidae.     

河蟹生态养殖中动物性饵料量的调查分析

本文调查了河蟹生态养殖中动物性饵料投喂数量,分析了动物性饵料量与河蟹每667m2产量、平均规格和每667m2利润的关系,提出了河蟹生态养殖中动物性饵料量的数学模型,初步确定了动物性饵料的合理投喂量、饵料系数和蛋白质需要量的参考值.     

The efficacy of Vespex® wasp bait to control Vespula species (Hymenoptera: Vespidae) in New Zealand

ABSTRACT

Transitioning from trials to pest control tool, the efficacy of controlling wasps Vespula vulgaris and V. germanica using Vespex® wasp bait was tested in 2015. Vespex® is a protein-based bait matrix with 0.1% fipronil. Five sites ranging <300 to >2000 ha and over 5500 ha in total had bait stations placed 300 × 50 m apart and received one application of Vespex®. Wasp nest traffic rates declined 93% in four days at one site, and over 97% after 20–38 days at all other sites. Measured honeydew availability also improved post wasp control. Further demonstrating feasibility, five different agencies worked closely with government leading many programme aspects. Vespex® was made more widely available in New Zealand towards the end of 2015. Web page information showed ～30% of all territorial authorities nationally are engaging in pest wasp problems. This signals a future potential in the way that pest wasps might be managed in a community context for social, economic and biodiversity conservation objectives.