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OSU Extension

College of Food, Agricultural, and Environmental Sciences


Crop: Pumpkins, Cucumbers, Sweet Corn, Tomato, etc.

Squash Vine Borer Trap x2


Report date: 07/19/21

Sqash Vine Borer Trap: 8 SVB adults/moths were found in trap #1 and 2 were found in trap #2. "Squash vine borer damage will have a hole in the stem often surrounded by sawdust-like material called frass. The squash vine borer larva eating its way into the stem of the plant makes frass (Figure on the right). Holes in the stem are sometimes difficult to find once plants are large. Squash vine borer causes plants to wilt and sometimes to die. Damage caused by squash vine borer can be mistaken for bacterial wilt because it can cause the squash leaves to wilt without warning."

Management: "One of the best ways to manage squash vine borer is to plant a variety of squash that they are not interested in. For example butternut squash, which has thin stems, tends to have low infestation rates while zucchini, Hubbard squash, and pumpkins tend to be very attractive to squash vine borer. Row covers can be used to block egg-laying in late plantings but covers need to be removed as soon as female flowers appear so that pollination can occur. Insecticides can be used to control squash vine borer but the timing of the sprays is critical. Having a pheromone trap will allow you to know when the squash vine borer is emerging. One week after squash vine borer moths are detected, you will want to spray the base of the stem where the eggs will be hatching. The idea of spraying is that you want to kill the larvae before they are able to get into the stem where insecticides will no longer be effective. Insecticides that generally are most effective for squash vine borer are pyrethroids such as permethrin (Pounce), zeta-cypermethrin (Mustang Maxx), esfenvalerate (Asana), lambda-cyhalothrin (Warrior), bifenthrin (Brigade), and zeta-cypermethrin + bifenthrin (Hero). Carbaryl (Sevin) has fair efficacy. Products that do not list squash vine borer as a target pest on the label but that are known to provide some control are acetamiprid (Assail), spinosad (Entrust), and pyrethrins + piperonyl butoxide (EverGreen). Traditional recommendations are to spray once per week as long as adult moths are active, which can be for 6 weeks; pyrethroids have long residual so they are likely to be effective on a 14-day interval, while spinosad or pyrethrins have a short residual and need the 7-day interval."

More details about identification and management can fe found at VegNet Newsletter: Vol. 23 Number 10, June 21, 2016




Report date: 06/03/21

Pumpkin Field #1 plant date: 06/02/21

Description: 2 Squash Vine Borer traps were places in seperate fields.We will continue to monitor SVB populations throughout the growing season. Additional pest updates will also be posted as we have them. 

Pest: Squash Vine Borer -  "The squash vine borer larvae tunnel into pumpkin vines causing them to wilt and eventually die. Sawdust-like frass at the base of stems indicates the presence of the borer. Once inside the vine, little can be done to control the borer. Adult moth populations should be monitored to indicate need for control. " From:

Image AImage B

Image B source: Michigan State University Fact Sheet: