咖啡黑小蠹的发生规律及药剂防治研究   总被引：1，自引：0，他引：1  

林延谋  章创鹏 《热带作物学报》1994,15(2):79-86

咖啡黑小蠢是近年在兴隆华侨农场严重危害中粒种咖啡的重要害虫。据1989年对4—5年生咖啡树调查,植株受害率100％,枝条受害率29.7—82.5％,虫害枯枝率7.65—17.8％。该虫以雌成虫钻蛀咖啡枝条为害,幼虫和成虫取食蛀道壁上的真菌菌丝。田间种群数量通常在3月上旬开始剧增,3月中下旬为高峰期,7月至10月田间虫口极少,11月以后逐渐有虫口及虫枯枝出现。温度是影响虫口波动的主要因素。2.5％溴氰菊酶、25％杀虫双、40％乐菊酯各兑水1000倍对成虫直接触杀效果显著,死亡率均为100％。48％乐斯本、40％氧化乐果400—800倍液等12种杀虫剂田间喷雾对咖啡枝条蛀洞内的成虫、蛹、幼虫防效均不明显。  相似文献   

桑苗圃和桑园的化学除草     

黄健明  仇广泰  薛彦明 《蚕桑通报》2001,32(1):27-28

用氟乐灵和精稳杀得或高效盖草能进行桑苗圃除草，用草甘磷和乙草胺混合进行桑园除草，可有效地防除杂草。  相似文献   

蒜地杂草的化学防除（上）     

薛光 《长江蔬菜》1997,(10):1-4

论述了我国蒜地除草剂应用概况，华东地区蒜地杂草有２０科５４种，组成５种不同杂草种群生态区。蒜草醚、旱草灵、乙草胺、恶草灵等对不同品种大蒜的安全性测定结果，蒜草醚、恶草灵、旱草灵安全系数４，乙划是胺，大惠利安全系数为２，嘧黄隆不可在大蒜地应用。  相似文献   

佐剂对鸡补体水平影响的研究     

马本江  王君伟 《黑龙江畜牧兽医》1993,(10):1-3

６０只未免疫的伊莎褐雄鸡雏分成４组，于２４日龄开始用试管法以５０％溶血度为标准样检测补体。３１日时Ａ，Ｂ，Ｃ三组分别皮下注射司盘－８０＋白油，氢氧化铝胶和ＢＣＧ，Ｄ组对照；４６日龄时再次注射。从３１日龄至５６日龄每隔５天检测一次。结果表明，佐剂使鸡的补体水平普遍升高。于每次注射后第５天达到高峰，第１０天左右接近正常。其中ＢＣＧ影响现大，并于５１日龄时天对照组异显著（０．０１＜Ｐ＜０．０５）．  相似文献   

控制sch单养雄蚕品种雌雄蚕孵出比例的催青处理因素研究   总被引：1，自引：1，他引：0  

陈萍  鲁成  朱勇  向仲怀 《蚕业科学》2002,28(1):31-34

研究结果表明 :在RH 6 0 %状态下 ,控制性比的温度和下限时间负相关达到显著水平 ;控制性比的高温处理适于干燥状态下进行 ;处理后雌蚕孵化整齐度明显低于雄蚕孵化整齐度 ,雌雄蚕孵化整齐度均随处理温度的升高而下降 ,尤以雌蚕更为明显。由此提出了在RH 6 0 %状态下sch单养雄蚕品种控制性比的起点温度及温度、时间范围。认为高温催青用下限温度配合 1日收蚁法效果好 ,高温处理以后的胚胎适于在RH 80 %～ 85 %的湿度中保护  相似文献   

黄淮夏大豆籽粒的着生部位对其品质的影响     

谷传彦  黄兴蛟  马效洪  戚凤秋 《安徽农业科学》2002,30(5):697-697,699

以黄淮地区主要栽培的有限和亚有限2种结荚习性的6个大豆品种为材料,分析不同结荚部位籽粒的蛋白质和脂肪含量,结果表明:两种结荚习性的大豆品种,其籽粒蛋白质含量均是上部最高、中部次之、下部最低;而脂肪含量则与之相反.  相似文献   

Sensitivity of four Yeasts to Fungicides and CO2 Concentrations and Their Antagonistic Ability in Combination with Fungicide to pathogenic Fungi in vitro     

TIAN Shi-ping  YAO Hong-jie  QIN Guo-zheng  XU Yong  FENG Xiao-yuan 《中国农业科学(英文版)》2004,3(3)

The yeasts Cryptococcus laurentii,Trichosporon pullulans,Rhodotorula glutinis and Trichosporon sp.were used to investigate their sensitivity to four fungicides and different concentrations of CO2,as well as their antagonistic ability to Penicilliumexpansum and Alternaria alternata in vitro when applied with fungicide.There were significant differences in sensitivity to the fungicides among the different yeasts(P = 0.05).R.glutinis was more sensitive to Deccocil,Iprodione and Stroby as compared to other yeasts.Combination antagonistic yeasts with fungicide could more significantly enhance biocontrol ability of the yeasts against the pathogenic fungi in vitro(P = 0.05).C.laurentii was the most effective antagonist among the four yeasts and could completely control spore germination of P.expansum and A.alternata when combined with Stroby at the concentration of 100 μL L-1.The yeasts,except R.glutinis,could grow well on nutrient yeast dextrose agar (NYDA) after 8 d incubation even at 20% CO2 concentration at 25℃.Particularly Trichosporon sp.showeda better adaptability to low temperature as compared to other antagonists.  相似文献   

梨菇的化学成分分析   总被引：5，自引：2，他引：3  

刘云派 《中国食用菌》2003,22(4):45-46

对江西赣南北部林区的野生裂菇进行了化学成分分析，结果表明，它含金属元素15种、粗蛋白含量达27．52％、氨基酸含量达23．98％，是一种很优秀的野生食用菌。  相似文献   

Storage of Non-structural Carbohydrates in Sweet Sorghum [Sorghum bicolor (L.) Moench.]: Comparison of Sterile and Fertile Lines     

R. Fortmeier  S. Schubert 《Journal of Agronomy and Crop Science》1995,175(3):189-193

The accumulation of soluble carbohydrates in vegetative parts of sweet sorghum ( Sorghum bicolor (L.) Moench.) represents an intermediate reserve pool for grain filling as well as an irreversible storage up to maturity. In order to study the effect of Sterility on soluble sugar accumulation in vegetative parts, two cytoplasmic male sterile (CMS) lines of sweet sorghum were compared with their corresponding fertile mamtainers for non-structural carbohydrate concentrations in shoots. Plants were harvested at four different physiological stages. The lines showed significant differences in the yield of non-structural carbohydrates. At maturity, the yields of soluble carbohydrates from vegetative parts of the two sterile lines were 93 % and 43 % higher than the yield of the two corresponding fertile lines. At that stage, sucrose represented about 80 % of total soluble carbohydrates and the higher yield of soluble carbohydrates of sterile lines was mainly due to the higher yield of sucrose. This indicates that the yield of extractable carbohydrates, especially sucrose, in vegetative parts of sweet sorghum could be considerably improved by using sterile lines which are utilized in hybrid production.  相似文献   

陆地棉核雄性不育材料在山东不同地区的育性转变及应用研究     

张军  庞居勤 《山东农业科学》1996,(1):4-7

对在山东的济南、平度、莱西、烟台种植的几种陆地棉（Ｇｏｓｓｙｐｉｕｍ　ｈｉｒｓｕｔｕｍＬ．）核雄性不育材料的育性表现进行了研究,结果表明：洞Ａ不育系的衍生材料ＭＢ、ＭＡ在不同气候条件下有育性的变化。在济南高度不育,可作为不育系。在其他几个地区表现不同程度的可育。其中ＭＢ在平度有相当好的育性,能正常结铃。而双隐性核不育材料５９Ａ、６２Ａ未能观察到育性变化。本文就核不育材料在棉花杂交制种中的应用前景及需深入研究的问题作了探讨。  相似文献