Strawberries are aggregate fruits. Although raspberry flowers are self pollinating, bee activity is still responsible for 90-95% of pollination. More information: Chapter 7 Small Fruits and Brambles: Strawberry Pollination (pages 679-688 in: USDA Insect Pollination of … However, the most common cause is a lack of pollinators, such as domestic and wild bees, during the flowering period. Cold temperatures, rainy and windy weather can slow bee activity, so you might not get as many pollinations if the flowers are blooming at an inopportune time. Poor pollination. There are three reasons for deformity in strawberries with a possible fourth put forward for discussion: Poor pollination. There are three reasons for deformity in strawberries with a possible fourth put forward for discussion: Poor pollination. The first reason is the most likely and has to do with lack of pollination. You will see these as “seeds” on the outside of the strawberry fruit which are called achenes. Strawberries can form misshapen fruits if inadequate pollination occurs. Poor pollination may have contributed to low set in some locations. Small seedy fruit and uneven growth are symptoms of poor pollination. The strawberry receptacle may have up to 500 ovules per berry. A minimum of ten plants is good, but twenty will be better. Strawberries that are lobed, especially seedy and juiceless on one section, and lopsided are likely improperly pollinated. Another issue may have been pollination. The first reason is the most likely and has to do with lack of pollination. Misshapen strawberries are quite common. Bees are the best pollinators of strawberries, so encourage them to take up residence in your yard. 3, had a question about lygus injury. This could be caused by poor pollination or even very windy conditions as fruit set occurs. There are many causes of poor formation and misshaping of raspberry fruit, including bad weather, genetics or viruses. 4) Fig. Misshapen fruit due to poor pollination can readily be distinguished from those damaged by tarnished plant bugs by examining the seeds. Hand pollinate with a paintbrush if needed. This is also discussed in Dr. Burrack’s blog: “ Lygus feeding does result in variable seed size and can, therefore, be distinguished from poor pollination in strawberries.” (Fig. Lygus bugs damage fruit by puncturing individual seeds; this, in turn, stops development of the berry in the area surrounding the feeding site. Poorly pollinated berries tend to be small with a rough, dimpled, seedy appearance similar to that of boron deficiency. Most commonly, misshapen strawberries during spring result from poor pollination. Poor pollination. 4. Lygus bugs are one of the causes of irregularly shaped, cat-faced strawberries; another cause may be poor pollination, which results in small undeveloped seeds. But, yes, there is no doubt a reason for misshapen strawberries like these. Strawberries are self-pollinating but form better fruits when a (ontinued on page 5) Poor Pollination Above is an example of a parthenocarpic However, the most common cause is a lack of pollinators, such as domestic and wild bees, during the flowering period. Lygus feeding results in variable seed size The same grower who sent the photo in Fig. Deformed berries are often due to poor pollination. But, yes, there is no doubt a reason for misshapen strawberries like these. Periods of cool rainy weather were common in early May during the early bloom period. Although raspberry flowers are self pollinating, bee activity is still responsible for 90-95% of pollination. They have multiple ovules per receptacle where the fruit is formed. 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