Abstract:研究了玻璃占、辐竹２选、矮澄辐２号及辐包矮１号等４个华南籼稻品种的白叶枯病抗性遗传。结果表明：供试品种的抗性属多基因遗传，控制单株平均病斑长的最少基因数ｋ＝５；广义遗传力的平均ｈｂ２＝７８．５９％；在入选率为０．０５的条件下，对单株平均病斑长作负向选择，遗传进度的平均△Ｇ＝－５．３７６±０．９０３（ｃｍ）；４个抗／感组合的Ｆ２均出现抗性超亲的个体，平均出现率为４．２４％；以不同组合Ｆ２的超亲个体相互杂交定向选择至Ｆ３，多数组合内抗性基本稳定，选择效果比抗／感单交组合好。

Abstract:Different types of photoperiod-temperature sensitive genic male sterile lines,Nongken58S,7001S,5047S.Peiai64S,AnnongS-1and 5460S were used to observe the individual fertility,The results showed that except AnnongS-1,the highly significant difference of fertility among florets of a plant was found in other seven male sterile lines.The differenee of fertility among florets was not effectively reduced by continually bagging single plant.A few selfing seeds were found during sterile pe-riod,The selfing seeds distributed randomly on panicle and possessed photoperiod-temperature sensitive sterility like original male sterile lines after they were planted.

Abstract:The present paper describes the shapes,hilum and spermoderm micromorphologicalcharacteristic of several Cruciferous weed seeds from Guangzhou.

Abstract:ＤＮＡ模板为ＩＢＶ广东地方株Ｄ４１经病毒ＲＮＡ提取后反转录而获得；两引物为ＩＢＶ Ｂｅａｕｄｅｔｔｅ株Ｓ１基因两侧的对应序列；跨幅为１．７ｋｂ。当限制性引物（Ｏｌｉｇｏ ３’）终浓度为０．８ｍｇ／Ｌ、两引物比例为１∶１０时，即得到不对称ＰＣＲ的预计单链和双链ＤＮＡ产物。此研究结果及不对称ＰＣＲ反应条件为国内首次报道。

Abstract:The lumbosacral and caudal protions of the spinal cords from 8 new-bornblack and white dairy cattle were stained in toto with toluidine blue or withNissl mixture for cell bodies after being divided into segments.And then,all thespinal cords were cut transversely by paraffin sectioning.It was found thatthere were 15 nerve nuclei in the spinal gray matter of the lumbosacral andcaudal portions in the dairy cattle.There were the nucleus marginalis,thesubstantia gelatinosa,the nucleus proprius,the nucleus reticularis and major part ofthe nucleus dorsalis in the dorsalis in the dorsal horn of the spinal cord;theminor part of the nucleus dorsalis,the nucleus intermedio-medialis and thenucleus intermedio-lateralis in the intermediate zone;the sacral parasympatheticnucleus.the nucleus commissuralis.the nucleus ventromedialis,the nucleusdorsomedialis.the nucleus ventrolateralis,the nucleus dorsolateralis,the nucleusretrodorsolateralis and the nucleus centralis in the ventral horn.The nervenuclei of the dairy cattle and other animals including human are also comparedin this paper.

Abstract:采用综合性防治措施，对广州市国营新洲奶牛场泌乳牛群（试验牛总数为５１２头）进行为期１８个月的乳房炎防治试验研究，结果表明，奶牛临床型乳房炎病率（按临床发病例数统计）由３５．２８％（１９９１年１０月至１９９２年９月）降至２７．８９％（１９９２年１０月至１９９３年９月）；隐性乳房炎乳区发病率由３７．４２％（１９９２年４月至９月，试验前）降至２９．３４％（１９９２年１０月至１９９３年７月，试验期）；头日

Abstract:In vitro inhibitory tests showed that the minimal inhibitory concentrations(MICs)of norfloxacin,ciprofloxacin, enrofloxacin,gentamycin and chloramphenicol were0.2,0.025,0.1,0.4 and 12.8 mg/L for Salmonella pullorum, respectively Followingtreatment with norfloxacin (50mg/L),ciprofioxacin(50 mg/L),enrofloxacin(50mg/L),gentamycin(50mg/L)and chloramphenicol(500 mg/L)via the drinkingwater for 5 successive days, tbe curative rates of the above five drugsfor S.pullorum infected chicks were 100%,100%,100%,86.7% and 86.7%,respectively.In the S.pullorum infected and untreated group,the mortality ofchicks was 43.3%.There were significantly differenee in weight gains betweenthe gro ups given ciprofloxacin,enrofloxacin and groups given norfloxacin.gentamycin and chloran1phenicol.

Abstract:This paper first reports two cases of aspergillosis in adult ostrich from MainlandChina.The micromorphological characteristics of damaged tissues in the Lung,Liver and Kidney are described in detail.This research supplies referenees forpathological diagnosis of ostrich aspergillosis.

Abstract:By analysing the susceptibility of different development stages of citrus leafminer,Phyllocnistis citrella,to insecticides and investigations into the correlation of leafminer population structure in field and the shoot length,the optimum spraying time indicated by shoot length was discussed.It found that the early stage of leafminer(including egg,the first and second instar larvae)were relatively susceptible to the five insecticides used,and the third instar larvae was relatively tolerant compared with the early stage.The results of estentses activity bioassay by the improved filter paper dot-spot test showed that the estenaes activity of the individuals of different development stages was negatively correlated with their susceptibility to insecticides.The correlation of the population structure in field and the shoot length of sweet orange(citrus chinensis)illustrated that the insect number in early stage was sound dominant in the population when the shoot length was less than 9.5 cm,whereas the inseet number of other stages was relatively even when the shoot length was more than 9.5 cm.The insect number in early stage reached 600 per hundred shoots when the shoot length was 4.5 and 10.5cm.It was emphasized that chemical control of citrus leafminer on sweet orange should be focused on the time when the shoot length was less than 9.5cm and the optimum spraying time was in 5.0 and 11.0cm of shoot length.

Abstract:比较了１３种寄主植物１２９个青枯病菌株对３种双糖（乳糖、麦芽糖、纤维二糖）和３种已醇（甘露醇、山梨醇、甜醇）的利用情况，结果表明它们大部分（８７．５％）分属于Ｈａｙｗａｒｄ的４个生化型，以生化型Ⅲ为优势生化型（约６５％）。除Ｈａｙｗａｒｄ的４个生化型外，还存在４个其它的生化类型：（１）１个能利用３种双糖和甘露醇、山梨醇而不利用甜醇产酸的马铃薯菌株；（２）３个能利用３种双糖和山梨醇、甜醇而不利用甘露

Abstract:The Meloidogyne incognita has become the most important pathogen of theroot-knot nematode disease of sugarcane in Zhanjiang and Panyu ofGuangdong.Second-stage of the species infected the roots of young shoot ofsugarcane.Five or six giant cells formed in the stele.Adjacent cells were stimulatedto divide resulting in forming either big or small root-knots.Root systems ofsugarcane plant infested by the disease were easily decay;stalks were thin and short;the foliages became yellowish in color that resembled the plant with deficient in ap-plied at 4.5kg(ai)/hm2 increased 10.7 percent in yield.

Abstract:The effects of selective and wide-spectrum pesticides on the population dynamics ofcitrus red nite,Panonychus citri McGregor were studied by means of the methods oflife table in this paper.Treatment with the wide-spectrum pesticide(fenvalerate)incitrus orchards brought about the reemergence of citrus red mite in a short time be-cause of killing a lot of natural enenues.Meanwhile,the density of the pestdecreased in the orchards treated by the selective pesticide(hexythiazox).The intrin-sic capacity of increase rates(rm)of the mite population were 0.0625 and-0.0118after treatments of fenvalerate and hexythiazox,respectively.The densities of naturalenemies were very low in the orchards treated by fenvalerate while the reverse resultswere observed in the orchards where hexythiazox was applied.

Abstract:利用具有不同程度抗性的５个花生品种，测定其受锈菌侵染前后有关生化指标如蛋白质、碳水化合物、氨基酸、核酸等的变化过程。结果表明，在健叶中碳水化合物与抗／感病性的关系基本上是碳水化合物含量越高的品种越感病，受侵染以后，总糖量病／健比值一般都小于１，说明本病是高糖病害。在侵染后１２ｈ时，越抗病的品种其蛋白质病／健比值越大。病叶中核酸总量比健叶有小幅度上升，但与抗性无明显相关关系。受锈菌侵染后出现含硫的胱

Abstract:报道了草菇上由绿粘帚霉引起的绿霉病并对致病菌的生长温度、ｐＨ范围、需氧等生理特性及寄主范围做了初步研究。

Abstract:The green peach aphid Myzus persicae(Sulzer)is a major pest on vegetables,crops and peach in China.The nymphs of the aphid were reared for two successivegenerations on five different hosts viz. lettuce(Lactuca sativa),crowndaisy chrysnathemum(Chrysanthemum coronarium),tobacco(Nicotiana tabacum,Linn.),mustard(Brassicaalboglabra Bail.)and radish(Raphanus sativus L.)to study the effects of hostplants on the suseeptibility to insecticides.Results of laboratory experiments showedthat when sprayed with 0.39 % of rotenone(isolated from Derris root),the aphidsfeeding on radish were the most tolerant to this botanical insecticide,while thosefeeding on lettuce were the most susceptible to this insecticide. Treatment withdimethoate showed similar results.Possible mechanism for the responses to the twoinsecticides,induced by food plants and their sigificances to field application ratesin relation to IPM program were discussed.

Abstract:The bacterial wilt(Pseudomonas solanacearum)of eucalyptus(Eucalyptus tereticornis)and equisetum(Casuarina equisetifolia)are important diseases in South China. This paper reports the bactericidal effect of antibacterial peptide from the Chinese oak silkworm(Antheraea pernyi)on the pathogens of bacterial wilt of eucalyptus and equisetum. Antibacterial peptide was induced in Chinese oak silkworm pupae by injecting Escherichia coli K12D31.Antibacterial peptide was purified from the haemo-lymph with CM-Sepharose CL-B6 and phenyl sepharose 4B. The purified antibacterial peptide had a molecular mass of a substanee of 4000 u and was labelled with fluo-rescent yellow. The pathogens wers treated with 10 mg/L of antibacterial peptide and observed under the scanning electron microscopy and laser scanning confocal imaging system to study how the antibacterial peptide inhibited and killed the bacteria.The result showed that the primary taget was the cell membrane. the fluorescent substances aggregated surrounded and embraced the surface of the bacterial membrane.then permeated into the cell and distroyed the membrane. Some small channels were found on the surface of the cell, the intracellular substances were forced out of the cell and finally the cell became empty and died.

Abstract:Cordyceps brasiliensis was collected in Guandong Province and inoculated into pupae ofBombyx mori.,and artificial culture of Cordyceps brasiliensis was successfully achieved.Themethod of artificial culture using the pupa of Bombyx mori.is described in this paper.Theergosterol,mannitol,adenosine,amino and microelement content of the artificially cul-tured Cordyceps brasiliensis was similar to that of Cordyceps sinensis.It had thepharmacologic effect of enhancing immunity and decreasing serum cholesterol in experimentalanimals.

Abstract:普查了广东桑３２４份材料染色体数，获得三倍体桑１５份；建立了应用秋水仙素处理广东桑杂种实生苗（有性系）诱导四倍体的技术程序，提出“苗期选择法”，从４个生态型中选择，可提高诱导率１．３３倍，选出的高产、优质材料也提高１．８３倍；研究了其主要性状，选出具有优质、高产、种子量多的种质资源一批，克服了从白桑、山桑、鲁桑等桑种的无性系获得的四倍体桑生长缓慢、生产量少、孕性差等缺点。利用四倍体桑为亲本，初步育

Abstract:According to field investigation and information collection,this paper reports the major species of garden plants in Thailand including 50 families,216 genera and 402 species.

Abstract:给出Ｒｉｅｓｚ空间关于下定向子空间所作商空间仍是Ｒｉｅｓｚ空间的特征。同时讨论了Ｒｉｅｓｚ空间之间的同态关系。

Abstract:Photoactivated insecticides show great potential as new resources of biorational insecticides.The discovery of phototoxins in plants provides new thinking in understanding the relationship between insects and their host plants.It is suggested in this paper that the avoiding light habit and the spe-cial body characteristics of Noctuidae larvae are due to feeding plants con-taining phototoxins for long period.This is the result of coevolution between insects and their host plants.