喜树暗斑螟生物学特性及防治

喜树暗斑螟Euzophera sp．是国内危害喜树Camptotheca acuminma Decn．的新害虫，在江西安福1a发生4代，以蛹在寄主树皮缝和枯卷叶内越冬。越冬代翌年4月上旬开始羽化并产卵。各代幼虫发生期依次为：4月中旬至6月中旬、5月下旬至7月下旬、7月上旬至9月上旬、8月中旬至10月中旬。在幼虫始盛期用40％氧化乐果乳油与水1：1的混合液涂环1周(宽为直径的1／3)，对当代防治效果达90％以上。     

昆虫生长调节剂抑太保防治马尾松毛虫试验初报

应用抑太保防治马尾松毛虫4－5龄幼虫，24h后害虫开始死亡，第4天达到死亡高峰，第10天虫口校正减退率平均达84％以上；防治药剂费用3.0元/hm^2，具有见效快、防治成本低的优点，是一种防治马尾松毛虫的理想药剂。     

白杨透翅蛾生物学特性及防治

记述了白杨透翅蛾在阜新城区的生活史、生物学特性 ,总结了防治方法     

外来有害生物红火蚁风险分析及防控对策

参照国内外有害生物风险分析方法，通过对外来有害生物红火蚁在我国的分布状况、潜在危害性、危害对象经济重要性、定殖和扩散的可能性和危险性管理难度的定性和定量分析，得出风险评估值R=1．861，表明该虫在我国属于中度危险的有害生物。必须通过检疫、监测等措施加强对红火蚁的监管，防止其扩散、危害。     

20%灭·阿可湿性粉剂防治落叶松毛虫试验

试验于 2 0 0 1年 8～ 9月 ,在内蒙古赤峰市克什克腾旗桦木沟林场华北落叶松人工林内进行。结果表明 ,使用 2 0 %灭·阿可湿性粉剂进行地面常规喷雾和喷粉防治落叶松毛虫的效果显著 ,采用用药量 4 5 0～ 75 0g/hm2 进行常规喷雾防治 ,落叶松毛虫虫口减退率达 97%以上 ;采用药量 6 0 0～ 90 0g/hm2 进行常规喷粉 ,虫口减退率达 90 %以上 ,而且常规喷雾的防效好于常规喷粉     

森得保药剂防治马尾松毛虫试验

2004年应用森得保粉剂、森得保飞防专用药对马尾松毛虫(Dendrolimus punctatus)进行了林间防治的试验。结果表明,喷撒300 g.hm-2、450 g.hm-22种剂量森得保粉剂防治效果可达80%以上;飞机喷施1.5 g.hm-2森得保飞防专用药7d后,防治效果可达91%以上。森得保粉剂、森得保飞防专用药防治马尾松毛虫效果好,持续控灾作用明显,是一种新型环保、高效的生物制剂。     

Predicting equations of main factors affecting regional climate in the "Three-North" Protective Forest Area

lntroductionInordertosolvetheseriousecologicaIproblemwefacedandimprovethephenomenonoflanddesertifi-cationinthenorthareaofChina.ChinahasbeguntoconstructtheThree-NorthProtectiveForestSystemsince1978.Withthehardworkoftwentyyears,itistold"Thegreatestecologicalprojectoftheworld"and"ThegreengreatwaIl".AIthoughthecountryinvestedIotsofcapitaItobuiIdtheThree-Northshelter-forestsystemthroughmanywayssuchasThree-Northspecialinvestment,financeappropriatefunds,finan-cialloansandtakeoutfundsforbringup…     

The severity and cause of leaf spot disease of Pongamia pinnata L. and fungicidal control of the pathogen

A survey on the symptom and severity of the leaf spot disease of Pongamia pinnata L. was conducted in the nurseries of the Institute of Forestry and Environmental Sciences, University of Chittagong （IFESCU）, Bangladesh Forest Research Institute （BFRI） and Aronnak Nursery in Chittagong. The highest infection percentage and disease index were found in IFESCU nursery, followed by BFRI and the lowest was recorded in Aronnak nursery. The associated organism of leaf spot disease of P. pinnata was isolated from the diseased plant parts and the pathogenicity was established with the isolated fungus. Colletorichum gloeosprioides Penz was proved to be pathogenic. The inhibition of mycelial growth of C. gloeosporioides was observed and identified as suitable fungicides （Bavistin, Cupravite and Dithane M-45） and doses （0.05, 0.10, 0.50, 1.00, 1.50 and 2.00）. The lowest and highest mycelial growth were respectively found on Bavistin and on Cupravite at the concentration of 0.05 after 8th day of incubation. It indicates that out of the three tested fungicides, Bavistin showed most effective, followed by Diathane M-45, and Cupravite was ineffective for its very little inhibition on mycelial growth.     

大悟县板栗雪片象甲发生规律及防治初报

板栗雪片象甲每年发生一代，为害板栗桑苞、票实、幼芽和嫩叶等；可人工收集烧毁落艺和使用甲胺磷等药物防治。     

EFFECTIVENESS OF ACEPHATE IMPLANTS IN PROTECTING CONES FROM INSECT DAMAGE IN SOME CONIFERFORESTS OF NORTHEASTERN CHINA

lNTRoDUCTloNInChina,onlyafewexperimentshavebeenperfbrmedtotestinsecticidessusceptibletopreventconesandseedsfrominsectdamage(Anonymousl986,GaoBuquetal.l99l,YueShukuil992,LiuYikong1993).Moreover,thesetestsonlyconsistedofsprayingchemi-cals,thatmayinduceharInfulconsequencesuponenvironment.TheintensifiedeffoftofafforestationinNortleasternChinarecentlyrequiredtoestablishlnyenumbersofseedorchards,aswellasparent-trCestands,inordertoprovideforesterswithhigh-qualityseeds,especiallyinlarch.Thispr…