BACKGROUND Tetranychus cinnabarinus is one of the pest insects most severely influencing strawberry production. It has a high attack rate and causes severe economic losses. Laboratory toxicity tests and greenhouse experiments were carried out using 13 acaricides to determine their efficacy and potential mechanisms of action. RESULTS Abamectin showed the highest efficacy against T. cinnabarinus female mites; its LC50 value was 0.18mg L-1. Pyridaben, cyhalothrin, veratrine, and carbosulfan showed reasonably high efficacy; their LC50 values were 2.69 mg L-1, 3.94 mg L-1, 5.98 mg L-1, and 6.75 mg L-1, respectively. Less effective were hexythiazox and bifenthrin, their LC50 values were 9.82 mg L-1 and 19.09 mg L-1, respectively. Other acaricides such as spirodiclofen, chlorantraniliprole, chlorfenapyr, spinosad, and bifenazate did not show good efficacy. The status of female mites treated with avermectin, pyridaben, kanghebio and cyhalothrin changed significantly under a fluorescence microscope. There were no significant differences among female mites treated with spirotetramat, chlorantraniliprole, spinosad and bifenazate. Enzyme activity tests showed that Kanghebio and cyhalothrin obviously inhibited Ca2+-adenosine triphosphatase (Ca2+-ATPase), while veratrine and kanghebi obviously inhibited acetylcholinesterase (TChE) and monoamine oxidase (MAO). Cyhalothrinexerted an auxo-action on MAO. Greenhouse experiment indicated that abamectin showed the best efficacy, as well as the longest duration of efficacy, pyridaben, cyhalothrin, veratrine, and kanghebio followed, while carbosulfan, hexythiazox, and bifenthrin performed the worst. CONCLUSIONS Our study provided a scientific basis for chemical pesticides to be replaced by these and potentially other new bio-pesticides.

‘Tian Yangtao 3’is a bud mutation of carambola.The fruit is long elliptic in shape,Its av- erage mass is 183 g and the soluble solids content is 12.6% ,total sugar is 8.9%,total acid is 0.18%.The flesh is delicate and crisp,less fiber.The flavor is sweet sour and the eating quality is very good.

Daguotianyangtao 2 was selected from the seedlings of Averrhoa carambola L. The fruit shape is short elliptic, weighing 213 g on average, but reaching 485 g, containing a soluble solids content of 10.6%, total sugar of 8.3%, total acid of 0.24%. Flesh is fine, tender and crisp, with a few fibers .The flavor is sweet sour, of very good eating quality. It is a high and regular cropping cultivar.

1 20世纪80～90年代广西菠萝在罐头食品工业中的作用 1.1在我国菠萝生产中的地位 20世纪80年代我国菠萝生产累计为2 837 609 t(未包括台湾省在内,下同),其中广西1 014 797 t,占全国累计总产量的35.76%;1991～1995年全国菠萝累计总产2 350 079 t,广西为630 025 t,占全国总产量的26.8%;1996～2000年广西累计5 a产量降至429 127 t,仅占全国同期总产量的12.39%.

番木瓜主要分布在热带和南亚热带地区,2004年全世界番木瓜总产量为650.4万t,国际贸易总额达3.55亿美元.由于番木瓜童期短,产量高,市场价格较为稳定,种植投资回收快和收益高,所以,近年来我国海南、广东、广西、福建和云南等省(区)的番木瓜适宜种植地区都在积极发展番木瓜生产.

荔枝原产于我国.目前世界上进行荔枝经济栽培的国家和地区不多,栽培总面积约80多万公顷,总产量不到200万吨,在世界水果总产量中只占极小的份额,约为0.45%,年国际贸易量不到3万吨,仅占水果国际贸易总量的0.1%.

近年来,国际市场对优质无公害瓜菜产品的需求不断增长,出口创汇蔬菜生产供不应求.为满足蔬菜的周年供应及其保鲜出口的需要,我们对蔬菜的栽培模式进行了探讨,实践证明,我们筛选的马铃薯-夏秋黄瓜-大蒜高效立体栽培模式,亩产量高,经济效益好,具有较为广阔的前景.

1我国余甘的分布及栽培 1.1我国余甘的分布 余甘又名牛甘果、喉甘子、滇橄榄、庵罗果、印度醋梨、庵勒,为大戟科叶下珠属落叶小乔木或灌木.其果鲜食味酸甜酥脆而微涩难忍,食后回味甘甜,故叫余甘.

余甘,又名牛甘果、喉甘子、滇橄榄、庵罗果、印度醋梨、庵勒等,为大戟科,叶下珠属落叶小乔木或灌木.其果鲜食味酸甜酥脆而微涩,回味甘甜,故名余甘.余甘果富含维生素C等物质,营养丰富,并且具有抗癌、抗衰老、增强人体抗病力等防病治病方面的作用,极具开发潜力.

近年来，国内外荔枝优良变异单株的发现时有报道，有些单株具有特有的优良经济性状，鲜果售价往往是主栽品种的2～5倍。广西荔枝优良变异单株资源丰富，但未能对这些优良单株的引种、保存与观察进行系统研究，也很少应用于品种改良、选育和推广。荔枝在广西的栽培面积仅次于龙眼，为提高荔枝鲜果的市场竞争力，促进荔枝品种结构的调整和优化，特开展本项目，旨在为进一步的性状遗传鉴定、育种的早期选择及品种改良工作提供参考。

1　概述 　　油梨又名鳄梨、酪梨，是一种适宜于热带及南亚热带地区栽培的果树，原产中美洲、南美洲热带及亚热带地区的墨西哥、厄瓜多尔、哥伦比亚等国，现有40多个国家有栽培；我国的海南、台湾、广东、广西、云南、福建、四川、浙江等省（区）都有栽培与分布。油梨嫁接苗定植后正常栽培，第4年便可投产，第6年每666.7m2可产商品果500kg以上。油梨果实梨形、长梨形、椭圆形或近圆形，果皮粗糙或光滑，成熟时果皮淡绿、绿色或暗绿色，采下后熟后果皮变成黄绿、乳黄、褐色或暗褐色；后熟时果肉微软，肉色乳白、淡黄或乳黄，肉质细腻；果肉具蛋黄味，略甜。单果重150～1 500g，种子大，鸡心形或扁圆形，果肉较薄，仅1.24～2cm，但可食率达70%～84%。自谢花至果实成熟约需150～200天。

‘钦州红荔’是‘黑叶’荔枝的实生变异后代。早实丰产，大果型，果皮鲜红色，肉质脆，味清甜，品质优，焦核率 36.15%。

The strain selection, biology characteristics and cultural practices of Qinzhou red litchi are briefly described in this paper.

在广西钦州市钦北区新棠镇进行田间试验,观测"钦州红荔"株系和"黑叶"、"香荔"品种单株的植株形态和果实性状表现,采集营养梢老熟叶片进行过氧化物酶(POD)同工酶分析.结果表明:"钦州红荔"植株形态和果实性状保留有"黑叶"和"香荔"品种单株的一些特性,该株系早结丰产、果形特大、果皮鲜红色、品质优.叶片POD同工酶分析,它们具有相似遗传基础、迁移率(Rf)为0.33和0.54的2条特征酶带,初步鉴定认为"钦州红荔"株系是"黑叶"和"香荔"单株的自然杂交实生优良后代.

调查发现桂西岩溶山区野生葡萄资源种类有毛葡萄、刺葡萄、小果野葡萄和葛等4种及变种1个.选出综合性状优良的"古山2号"和"中旧5号"两个毛葡萄单株.野生葡萄扦插宜在3月下旬气温回暖稳定后进行,用IBA200～400mg/L处理枝条120分钟,扦插成活率达67.5%～75.0%.毛葡萄茎段腋芽离体组织培养,以BA1.0～2.0mg/L配比对继代和生根培养效果最好.

对龙荔、龙眼与荔枝的植物形态学及其过氧化物酶同工酶进行分析,龙荔从叶和叶背茸毛有别于龙眼与荔枝,小花、果核、果肉风味似龙眼,而果皮似荔枝;龙荔不具有龙眼和荔枝的特征谱带,酶谱介于龙眼与荔枝的酶带之间,慢区深带较接近于龙眼的特征谱带。可以认为,龙荔是龙眼与荔枝的自然杂交种,母本为龙眼,父本为荔枝。