The aphid Aploneura lentisci is widespread in Australia and New Zealand, living all year round on roots of its secondary grass hosts. The fungal endophyte (Epichloë festucae var. lolii), strain AR37 in Lolium perenne is known to greatly reduce populations and was a likely reason for the superior growth and persistence of this association previously observed in the field. Aphid populations were quantified in a field trial near Ballarat, comparing yields of perennial ryegrass infected with eight different endophyte strains and an endophyte-free (Nil) control in a common ryegrass background (Grasslands Samson (G. Samson)). AR37 and another endophyte strain, AR5, had significantly fewer aphids than all other endophytes. These differences were significantly related to yield increases taken before and after sampling that persisted until the end of the trial. In a pot trial comparing commercially available ryegrass-endophyte combinations with equivalent Nil controls, aphid numbers were lower on G. Samson AR37 and Banquet II with AR5 (Endo®5) than on all other cultivar-endophyte combinations. Compared with Nil controls, the common toxic strain in G. Samson, and two strains in Trojan also reduced aphid numbers. The AR5 endophyte produces the alkaloid ergovaline but high concentrations of this in roots of potted plants could not account for differences in root aphid numbers. Root concentrations of epoxyjanthitrems, the only known alkaloids produced by AR37, were low and unlikely to be the cause of resistance to A. lentisci.

蚜虫Aploneura lentisci在澳大利亚和新西兰广泛分布，一年四季都生活在其次生草宿主的根上。的内生真菌（稻香festucae变种lolii），菌株AR37在黑麦草众所周知，这种结合会极大地减少人口，这可能是以前在实地观察到的这种关联的出色增长和持久性的可能原因。在巴拉瑞特（Ballarat）附近进行的田间试验中对蚜虫种群进行了定量，比较了常见黑麦草背景下被八种不同内生菌菌株感染的多年生黑麦草的产量和无内生菌（Nil）对照（Grasslands Samson（G. Samson））。与所有其他内生菌相比，AR37和另一种内生菌菌株AR5的蚜虫明显减少。这些差异与采样之前和之后一直持续到试验结束的产量增加显着相关。在一项盆栽试验中，将市售的黑麦草-内生菌组合与同等的Nil对照进行了比较，蚜虫数量在G上较低。Samson AR37和Banquet II与AR5（Endo®5）的组合比所有其他品种-内生菌的组合都要多。与Nil对照相比，G。Samson中常见的毒株和Trojan中的两种毒株也减少了蚜虫数量。AR5内生菌可产生生物碱麦角缬氨酸，但在盆栽植物根中高浓度的麦角碱不能解释根蚜数的差异。AR37唯一已知的生物碱，环氧菊酯的根部浓度很低，不太可能是引起抗药性的原因。A. lentisci。