Occasionally, however, they will take long-continued flights, when the course is more or less direct and distinctly midge-like.
A 5% interspersed refuge produces wheat midge larvae which damage seeds.
The matings of midges in the separate blocks would be strongly assortative for virulence against crop resistance genes.
The densities of mature midge larvae and parasitoids were in proportion to the size of the refuge.
The peaks of subsequent generations of adult wasps were at the time of midge larval emergence.
Without this deterrence, the ratio of production of midges would have been 14:1 instead of 41:1 in susceptible versus resistant wheat.
Because of that, the number of parasitoid generations was found to be equal to the number of midge generations.
Three haplotypes (haplotype 1, 2 and 3) were found in the sequential variations of the soybean pod gall midge (table 7).
