黑皮大果型西瓜新品种汴杂9号的选育

汴杂9号是开封市蔬菜科学研究所以KS165为母本、KS28为父本选育的中熟、黑皮大果型西瓜新品种。植株根系发达,生长健壮,抗逆性强。全生育期约103d,果实发育期33d;主蔓第1雌花着生节位8～10节,雌花间隔5～6节。果实椭圆形,果皮纯黑有果粉,商品性好;瓜瓤鲜红色,中心可溶性固形物10.0%以上,边部8.0%左右,质脆爽口;皮厚1.1～1.2cm,韧性大,耐贮运;单果质量6～8kg,667m2产量3500kg左右。田间表现对枯萎病抗性强,较少发生病毒病。适宜河南、山东、河北、安徽、广西等省区种植。     

薄皮甜瓜新品种白玉满堂的选育

白玉满堂是中国农业科学院郑州果树研究所近期育成的白皮白肉类薄皮甜瓜优良杂交一代品种。果皮白色,果肉白色,果实圆梨形。主要特征为成熟较早(果实发育期28~33 d),品质较优(肉质脆,中心可溶性固形物含量较高,为13.1%~14.8%),果实大小适中(单果质量0.38~0.44 kg),田间抗性表现较好,适应地区较广。2010年10月通过国家甜瓜新品种鉴定。     

早熟西瓜新品种晋抗4号的选育

晋抗4号是山西省农业科学院园艺研究所以自交系99-20为母本、Ja-126为父本配制而成的西瓜一代杂种。早熟,全生育期约97d,果实发育期28d。果实圆形,黑皮,皮厚1.4cm,硬韧,耐贮运;瓜瓤大红色,质地脆沙,中心可溶性固形物11.5%。平均单果质量5kg,667m2产量3000kg。田间表现对枯萎病有一定抗性,对炭疽病抗性强。适宜于山西省及周边地区早熟栽培。     

新媒体时代科普工作原则--基于CAS理论视角

简述了新媒体和复杂自适应系统（CAS）理论的相关概念,辨析了传统科普和新媒体时代科普的不同,指出了新媒体时代的科普系统是CAS ,提出了用CAS理论指导新媒体时代科普工作的几点原则。     

沟环线虫属一新种-合川沟环线虫(垫刃目:环科)

合川沟环线虫Ogma hechuanensis n.sp.采自四川合川县柑桔根围土壤中，该种雌虫体较长，R＝64－74。第一头环直矩大于第二环。头体间缢缩明显。体中部鳞片列通常为11－12。鳞片近方形，近阴门处其先端呈锯齿状。口针长116．54－13．7．91μm,Rexp=19-22。阴门、肛门距尾端近，Rv=5-7，Ra=2－4。尾端钝，具数个鳞片，与近似种O.querci在以上特征上可相区别。     

海南被子植物分布新资料(Ⅱ)

报道了海南岛被子植物5个新记录种。新记录种分别为三室黄麻(Corchorus trilocularis L.)、钻叶紫菀(Symphyotrichum subulatum(Michx.)G.L.Nesom)、光果姜(Zingiber nudicarpum D.Fang)、线纹香茶菜(Isodon lophanthoides(Buch.-Ham.ex D.Don)H.Hara)、狭序泡花树(Meliosma paupera Hand.-Mazz.)。凭证标本保存于中国热带农业科学院植物标本室(ATCH)。     

Selection,mechanism, cross resistance and stability of spinosad resistance in Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae)

Spodoptera litura is one of the most destructive pests in Pakistan and in many other regions of the world. A field collected population of S. litura was selected with spinosad for eleven generations under controlled laboratory conditions to study the cross resistance, mechanism and stability of spinosad resistance in S. litura. The resistance to spinosad in S. litura increased 3921-fold (after eleven generations of selection with spinosad) as compared to a susceptible population of S. litura. No cross resistance between spinosad and emamectin benzoate, methoxyfenozide, fipronil, indoxacarb, profenofos, lufenuron or deltamethrin was found in the spinosad-selected population of S. litura. To find the possible mechanism of spinosad resistance in S. litura two synergists, Piperonyl butoxide (PBO), S, S, S-tributyl phosphorotrithioate (DEF) were tested on the susceptible and resistant strains and on the un-selected field population. The values of the synergism ratios of PBO and DEF were 2.33 and 1.06 for the spinosad-selected strain, 1.36 and 1.06 for the un-selected field population and 1.14 and 1.00 for the susceptible strain, respectively. As high PBO ratio indicates the role of microsomal O-demethylase in causing spinosad resistance in S. litura. The spinosad-resistant and field populations of S. litura were reared without any selection pressure from the 12th to the 16th generation (G₁₂–G₁₆). The spinosad resistance decreased from 3921 to 678-fold in the spinosad-resistant population and from 31.1 to 15.1-fold in the un-selected population of S. litura as compared to the susceptible strain. Spinosad resistance in S. litura has a high reversion rate (−0.15) which indicates that spinosad resistance in S. litura is unstable and can be easily managed by switching off the selection pressure for a few generations or alternating with insecticides having different modes of action.     

怀洪新河（安徽段）森林长廊建设规划要点浅析

怀洪新河是安徽境内第三大人工河流，河道两侧林木已陆续采伐，亟待更新并将建成森林长廊。通过对怀洪新河（安徽段）森林长廊建设类型、方式及建设布局的确定，提出河道管理区域内人工造林和更新改造的技术方案，旨在为森林长廊的建设提供参考，改善河道生态环境。