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Mullein Plant Bug Control Trials 2002 D. Kain, Dept. of Entomology, NYSAES, Geneva

Summary: Mullein Plant Bug Control Trials 2002
D. Kain, Dept. of Entomology, NYSAES, Geneva
Insecticide screening trials conducted in Geneva in 2001 indicated that chlorpyrifos (Lorsban
4E) and thiamethoxam (Actara 25 WDG) applied at the pink stage would provide control, in
terms of reduced fruit damage, of mullein plant bug, Campylomma verbasci. However, bloom,
the critical time period for mullein bug control through which effective insecticide residues must
remain, was considerably shorter in Geneva than it was in the major fruit growing area near Lake
Ontario. Therefore, to determine if these two treatments were sufficiently long-lasting, we tested
them against a standard treatment of esfenvalerate (Asana XL) and an untreated control at three
locations in Wayne County. Due to spring weather conditions that resulted in mullein bug
overwintering eggs hatching late in relation to the period in which the crop is most susceptible,
we observed no damage even in untreated plots. However, nymph counts in all three insecticide
treatments were significantly lower than in untreated plots (Table 1). At all three sites, counts
were lowest in the Lorsban treatment, which was equivalent to the Asana standard. Counts in
Actara-treated plots were also equivalent to Asana, but significantly higher than in the Lorsban
Table 1. Control of mullein plant bug with insecticdes, Wayne Co., 2002.
Mean total #
Site Treatment Rate/100 gal MPB nymphs/4 limbs
Simpelaar Lorsban 4E 16.0 fl oz 0.00 a


Source: Agnello, Arthur M. - Department of Entomology, Cornell University


Collections: Biology and Medicine