甘蔗蓟马为害损失研究

Study on Damage Loss of Sugarcane Thrips

为明确甘蔗蓟马对甘蔗的为害损失,应用化学防控手段控制蓟马为害,研究了蓟马为害对不同抗性甘蔗品种产量和糖分的影响,并探讨了蓟马防控的投入与产出关系。结果表明,蓟马为害对甘蔗产量和糖分会产生较大影响,其产量影响程度与甘蔗抗蓟马性相关,而糖分影响与抗蓟马性无关。其中,抗性较强品种柳城05-136和云蔗05-51产量损失为13.04%~21.06%,糖分损失为8.33%~8.40%;抗性较弱品种粤糖93-159产量损失高达40.58%,糖分损失为8.44%。从蓟马防控投入与产出关系看,越感虫品种投入产出比越大,即通过防控获得利益越大。研究结果明确了不同抗性甘蔗品种受蓟马为害后的产量和糖分损失,为蓟马防控决策奠定了较好的基础。

In order to clarify the damage loss of sugarcane thrips to sugarcane,chemical control methods were used to control the damage of thrips.The effects of thrips damage on the yield and sugar content of sugarcane varieties with different resistance were studied,and the relationship between input and output of thrips control was discussed.The results showed that thrips damage would have a great impact on sugarcane yield and sugar content.The degree of yield impact was related to sugarcane resistance to thrips,but sugar content impact was not related to sugarcane resistance to thrips.Among them,the yield loss of Liucheng 05-136 and Yunzhe 05-51 with strong resistance was 13.04%~21.06%,and the sugar loss was 8.33%~8.40%.The yield loss of Yuetang 93-159 with weak resistance was as high as 40.58%,and the sugar loss was 8.44%.From the input-output relationship of thrips prevention and control,the input-output ratio of insect susceptible sugarcane varieties was significantly higher than that of insect resistant varieties and the control of thrips by insect susceptible sugarcane can obtain greater benefits.The results clarified the yield and sugar loss of sugarcane varieties with different resistance after being damaged by thrips,which laid a good foundation for control decision-making to thrips.