【摘要】 采用整株调查法和网捕法调查了昆明地区小春马铃薯田中南美斑潜蝇的发生情况。结果显示,在小春马铃薯的整个生长季节中,南美斑潜蝇幼虫主要危害中下部叶片,对上部叶片的危害较轻。幼虫在4月3日以前一直保持在较低的密度水平,中部、下部叶片的危害指数分别在15.00和22.63以下,随后密度开始上升,到4月18日达到高峰,中部和下部叶片的危害指数分别达到69.63和51.25,之后由于部分被害老叶枯死脱落,虫量下降,到临近采收的4月24日,中部和下部叶片的危害指数分别下降到43.50和35.75。成虫数量只有1个高峰,出现在4月11日,每网虫数达32.6头,但成虫取食产卵造成的危害有2个高峰,第1个高峰出现在4月11日,中、下部危害指数分别达41.50和39.38,第2个高峰出现在收获前的4月24日。更多还原

【Abstract】 The occurrence of the leaf-miner,Liriomyza huidobrensis Blanchard was studied in the vernal potato field in Kunming by sampling the whole potato plant and net trapping.Results showed that the larvae of L.huidobrensis Blanchard mainly injured the mid and low leaves as compared with upper leaves of a potato plant.The population of the larvae of L.huidobrensis Blanchard was in a lower level before April 3,and the hazard index was 15.00 and 22.63 respectively in the mid and low leaves.The population increased after April 3 and a population peak appeared on April 18.The hazard index came up to 69.63 and 51.25 respectively in the mid and low leaves of a potato plant.After that period,the population decreased with the decay and defoliation of those damaged old leaves,and the hazard index came up to 43.50 and 35.75 in the mid and low leaves on April 24,which was close to the harvest time.The only peak population of adult appeared on April 11 and the density reached 32.6 individuals per net.But the damages caused by adults had two peaks,which appeared on April 11 and April 24,with a hazard index of 41.50 and 39.38.更多还原