果实套袋研究进展

综合介绍了果实套袋技术,包括套袋材料、时期、套袋方法、套袋对果实内、外品质、贮藏性、农残、病虫害的影响及机理,并提出当前套袋技术推广应用存在的问题及解决办法。     

银杏病虫害调查与综合防治对策

于2002-2006年在广东、湖南及广西等地对银杏病虫害种类及其为害情况进行了调查,共发现害虫27种,病害9种;分析了影响银杏病虫害发生与分布的主要因素（温湿度、周围环境及前茬作物、土壤条件、管理水平等）,总结了各地银杏病虫害发生与分布的特点,提出了相应的综合防治措施。     

山区茶园病虫害防治技术

主要探讨山区茶园病虫害发生特点,山区茶园病虫害控制的主要技术措施和茶园病虫害控制的策略。     

海南岛空心莲子草天敌昆虫种类调查

对海南岛空心莲子草的天敌昆虫种类进行调查。结臬表明,海南岛空心莲子草的天敌昆虫有：稻棘绿椿象、中华稻蝗、短额负蝗、白条细蝗、条纹褐蝗、短角外斑腿蝗、褐背细斯、莲草直胸跳甲、虾钳菜披龟甲、甜菜螟、豆卷叶螟、斜纹夜蛾、豆蚜13种,隶属于半翅目、直翅目、鞘翅目、鳞翅目、同翅目5个目中的缘蝽科、蝗科、螽斯科、叶甲科、铁甲科、螟蛾科、夜蛾科、蚜科8个科。其中莲草直胸跳甲、虾钳菜披龟甲、甜菜螟有很好的利用价值或利用的潜力。     

云南小规模芒果种植模式和病虫害防治调查

2008~2010年抽样调查了云南省主要芒果产区120个小规模芒果种植农户的芒果种植模式、病虫害知识、病虫害防治态度和行为。调查结果表明:农民种植芒果品种多达10个,套种模式多达11种。芒果种植户病虫害防治知识普遍缺乏,病虫害识别能力和防治意识较差,防治方法单一,以农药防治为主,管理相对粗放,致使芒果病虫害成为云南芒果产业发展中的主要障碍。     

云浮砂糖橘病虫发生情况及生态控制措施

砂糖橘在广东省云浮市大农业产业中占有举足轻重的地位,南盛镇90%以上的农户种植砂糖橘,是农村经济发展的重要组成部分和农民主要收入来源之一。同时,随着砂糖橘栽培规模的不断扩大,砂糖橘病虫害为害逐渐加重。针对"中国砂糖橘第一镇"南盛镇砂糖橘主要病虫害及其发生规律和为害特点,采用无公害的生态控制措施控制砂糖橘主要病虫害,以保证"南盛"品牌砂糖橘的优良品质。     

菌糠改良保护地土壤容重退化效果的研究

[目的]探讨食用菌菌糠做底肥对保护地土壤容重的改良效果。[方法]以平菇菌糠为底肥,用环刀法测定种植西红柿的保护地土壤容重。[结果]随着施用菌糠量的增加,土壤容重由1.38g/cm^3减小到1.14g/cm^3,处理间具有0.01水平显著差异。[结论]菌糠改良保护地土壤容重的效果良好,并且西红柿的产量和品质都得到明显的提高。     

佳多频振式杀虫灯对鳞翅目害虫诱杀效果

对佳多频振式杀虫灯的高压网线和接虫袋的不同处理试验结果表明:诱杀到鳞翅目害虫数是每天清刷高压网线>3 d清刷高压网线>5 d清刷网线>不清刷高压网线,每天清刷高压网线诱虫数为不清刷高压网线诱虫数的8.9倍;每天清洗接虫袋>3 d清洗接虫袋>5 d清洗接虫袋>不清洗接虫袋,4种处理的诱虫数差异较小;该杀虫灯对天敌影响不大。     

Within‐plant distributions of heliothis armigera eggs on cotton in Thailand

Abstract

Heliothis armigera (Hbn.) eggs on cotton tended to be placed on flat parts such as leaf laminas and bracts at the expense of linear parts such as stems, petioles and peduncles, which accounted for less than 3% of eggs in samples of 100–216 eggs. Numbers of eggs on bracts and leaves respectively rose and fell from 0% and 97% at 34 days after planting to 81% and 18% at 104 days; the levels were equal at 49% on day 83. Categorisation of leaves by stage of development showed that 80–90% of all leaf‐laid eggs were found on leaves at the ‘young’ to ‘soft‐expanded’ stages of development while categorisation by position showed that the first three leaves from the top of the stem received 90% of all leaf‐laid eggs. There was no consistent trend for egg laying on main‐stem or lateral stem leaves and over 97% were located on the upper (adaxial) leaf surface. Bracts of larger buds (more than 50% developed) were most favoured as sites for egg laying, but oviposition on bracts of bolls had overtaken that on buds by day 97. These preliminary, small‐scale investigations should be extended so that possibilities for the use of an integrated sample unit for eggs and small larvae can be assessed.     

储粮害虫综合防治新技术应用研究

研究了应用植物杀虫剂、生物农药和高效低毒农药防治储粮害虫。试验分为0．2mL／m^3蛇床子素、0．3mL／m^3蛇床子素、0．3mL／m^3蛇床子素十0．1mL／m^3溴氰菊酯、0．1mL／m^3蛇床子素-I-0．2mL／m3溴氰菊酯、0．5mL／m^3蛇床子素、1mL／m^3甲基嘧啶磷＋O．2mL／m^3蛇床子素、3mL／m^3双氧威十0．2mL／m^3蛇床子素、8mL／m^3双氧威、2mL／m^3双氧威＋O．3mL／m^3溴氰菊酯共9个处理，结果表明所有处理均能确保所储稻谷一年基本无虫，且对稻谷发芽率元显著影响。