Bonide Fruit Spray Label: Captan @ 11.76%, Related derivatives @ 0.24%, Malathion @ 6.00%, Carbaryl @ 0.30%, Hi- plum curculio is one of the more difficult pests to manage. Florida Entomologist. As a precaution I also sprayed once with Bonide Fruit Spray (see below for label info). Jenkins et al. Although natural parasites and predators of this pest have been identified, the extent to which these organisms suppress populations of plum curculio is lacking. Timing and thorough spray coverage are critical. https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/456/456-018/ENTO-336.pdf (see section 3)Picking off infested fruits from mthe tree and ground will help reduce populations next year. However, in Florida only the wasp was found, though it was responsible for an estimated average mortality of 37% of plum curculio. and (2) what is the impact of various irrigation levels on field efficacy? Over the past couple of days I began noticing the tell tale "crescent" scar on the plums. Good luck battling this difficult pest.Jon. Share sensitive information only on official, secure websites. Plum curculio is a major insect pest of apple, plum, apricot and cherry, and a minor pest of pear and peach. Plum curculio is a native pest of North America that can cause considerable problems in orchards throughout Kentucky. https://extension.umd.edu/hgic/topics/stone-fruit-insects, https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/456/456-018/ENTO-336.pdf, https://www.ars.usda.gov/research/publications/publication/?seqNo115=187849, https://extension.psu.edu/orchard-ipm-natural-enemies-biological-control-in-orchards. Changing the design of the orchard has solved a lot of problems, by design. Our survey suggests that parasitoid populations are extremely variable from one region to another and the implementation of a biocontrol program using parasitoids needs to consider regional populations of these insects. 2- Is the spray I'm using the best insecticide? Official websites use .gov I've only done one round of spraying back on April 15th at the 2.5 tablespoons per gallon. The reason being is that I might have been a little heavy handed spraying the first time and I noticed some damage on the fruit 2-3 days later. An apple fruitlet with plum curculio egg-laying scar. Irrigation did not have a significant effect on C. nenuphar suppression at both sites and in both years of the experiments. In Georgia, ants proved to be important predators of larval plum curculio, consuming up to 62% of all larvae trying to burrow into the soil. Make each fruit tree an island onto itself. Increasing basic knowledge of this pest can reduce peach growers’ reliance on the use of organophosphate pesticides. The plum curculio, Conotrachelus nenuphar (Herbst), is a key pest of pome and stone fruit in North America (Racette et al., 1992, Horton and Johnson, 2005, Leskey et al., 2009). See our web page:https://extension.umd.edu/hgic/topics/stone-fruit-insectsThe fruit spray you are using is the most effective on the market for home fruit growers (Imidan used to be the best product but was removed from the homeowner market years ago). We addressed these questions by comparing the efficacy of two nematodes, Steinernema riobrave and Steinernema feltiae (two nematodes that showed the highest virulence in prior lab assays and field trials) and an untreated control, at three irrigation levels 0, 1 and 6 irrigation events applied during a two-week period post-application. Experimental manipulation demonstrated equivocal impacts by predation. These conventional insecticides, such as organophosphates (OP) and pyrethroids, work primarily as lethal contact poisons on plum curculio …