Be alert in the spring as temperatures begin to rise and bean leaf beetle populations migrate toward soybean fields. After overwintering in leaf litter and soybean residue, bean leaf beetles start to emerge in April and May. According to Kansas State University, the bean leaf beetle is one of the most economically harmful soybean insects in the country due to damage from foliage- and pod-feeding adults. As a result, they can significantly reduce seed quality and yield. It may be difficult to recognize this destructive insect as it can appear in a variety of colors and patterns, including red, orange, tan or gray and have dots, stripes or both. All adults possess a black triangle at the base of the forewings which is the easiest distinguishing identification characteristic.

Take note of the above description as it is important for growers to scout diligently for the bean leaf beetle. In times of unusual weather patterns, it has been difficult for researchers and agronomists to make confident predictions about this pest. For example, a mild winter may result in higher overwintering survival of bean leaf beetle populations, resulting in higher-than-normal infestations.

According to the University of Missouri Extension, managing the bean leaf beetle should begin as soon as soybean seedlings emerge. For maximum accuracy, the best time to scout is during the warmest part of day in early spring. Adult bean leaf beetles can cause complete pod loss by feeding at the base of the pod, known as pod clipping. Moisture can then enter through the pod lesions caused by the pod clipping, allowing the entry of yield-robbing pathogens such as the bean pod mottle virus and southern mosaic virus. Soybean growers cannot afford the potential damage of a bean leaf beetle infestation, considering high populations have been known to reduce yields by as much as 20 to 50 percent. Fortunately, we have solutions for protecting soybeans from this damaging pest.

Syngenta solutions

Soybeans can start strong from day one with CruiserMaxx® Vibrance® Beans seed treatment, a combination of separately registered products. With proven insect and disease protection, CruiserMaxx Beans with Vibrance offers increased vigor, stand and speed to canopy as well as higher yield potential. Via the Cruiser Vigor effect, CruiserMaxx Beans may offer more robust and vigorous plants, even in the absence of insect pests.

To enable soybeans to yield strong, Endigo® ZC insecticide combines three industry-leading technologies, including two active ingredients plus a proprietary Zeon® Concentrate formulation, that provides fast knockdown and extended residual control of pod-feeding bean leaf beetles, among other insect pests. Endigo ZC also offers excellent tank-mix compatibility with Trivapro® fungicide for a one-pass application to target both insects and diseases.

 For all of the latest soybean news, visit or contact Syngenta at 866-796-4368. Tap into agronomic insights on to help maximize your fields’ potential. Join the conversation online – connect with us at



All photos are either the property of Syngenta or are used with permission.

Product performance assumes disease presence.

©2017 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties. Please check with your local extension service to ensure registration status. Endigo ZC is a Restricted Use Pesticide. Endigo ZC is highly toxic to bees exposed to direct treatment on blooming crops and weeds. Do not apply this product or allow it to drift onto blooming plants while bees are foraging adjacent to the treatment area. CruiserMaxx Vibrance Beans is an on-seed application of CruiserMaxx Vibrance alone or with Apron XL. Apron XL®, CruiserMaxx®, Endigo®, Trivapro®, Vibrance®, Zeon®, the Alliance Frame, the Purpose Icon and the Syngenta logo are trademarks of a Syngenta Group Company.

Syngenta hereby disclaims any liability for Third Party websites referenced herein.