【摘要】 赤松梢斑螟(D ioryctria sylvestrellaRatzeburg)主要以幼虫危害红松幼林的球果、嫩梢和干部,造成红松种子产量下降、质量低劣,严重的可导致红松种子绝产。为了解决红松种子严重短缺的问题,利用2.5%溴氰菊酯、20%速灭杀丁、50%辛硫磷和40%氧化乐果等化学药剂,在黑龙江省苇河林业局林木种子园进行了赤松梢斑螟防治试验。试验结果表明,球果被害率可减少20%~85%,种子被害率减少25%~45%。更多还原

【Abstract】 Dioryctria sylvestrella,of which the larvae bored the cone,shoot and stem of Korean pine,resulted in the reduction of the seed yield.To resolve the problem of shortage of seeds of Dioryctria sylvestrella,using concentration of 2.5% deltamethrin,20% fenvalerate,50% phoxim,40% omethoate,control experiments against Dioryctria sylvestrella were conducted in forest seed orchord of Weihe Forestry Bureau in Heilongjiang Province.Results showed that the cone damage rate reduced 20%~85%,and 25%~45% for seed damage.更多还原