In order to clarify the predation ability and predation regularity of Megalocaria dilatata on bean aphid,the M.dilatata collected in the wild was raised indoors for 2 generations,and then predation of each instar larva,female and male adult was measured.The Holling Ⅱ disk equation was fitted by the reciprocal method,and the predation characteristics of the M.dilatata were determined.The results showed that the predation amount of M.dilatata increased with the age of M.dilatata.When N→∞,the maximum predation of the 1st to 4th instars larvae,female and male adults on the bean aphid within 1 day were 30.1628,158.7003,556.3928,988.1128,841.0084 and 589.4011,respectively.The fitting equation between the predation amount and day age was y=3.9123x2.2092(R2=0.8093),and the predation amount increased exponentially with the increase of day age.The fitting equations of predation and day age of female and male adults were y=0.9453x2-28.274x+827.44(R2=0.456)and y=0.8762x2-31.511x+635.38(R2=0.7188),respectively,and predation amount of female and male adults decreased gradually with the increase of day age.
Megalocaria dilatatabean aphidpredationnatural enemybiological control
维普
万方数据
