Q.Pear Tree Fruit Drop
my pear tree is 4 years old it flowers fruits then the fruits turn black and drop of every year there is another pear tree next to it which is not affected
Certified GKH Gardening Expert
It likely has a fungal infection that is overwintering every year. It could be pear scab, sooty blotch or a leaf spot disease. It may even be due to a pest such as the sawfly. These articles will help pinpoint the problem and offer a solution:
https://www.gardeningknowhow.com/edible/fruits/pear/pear-tree-diseases.htm
https://www.gardeningknowhow.com/edible/fruits/pear/fixing-pear-tree-problems.htm
https://www.gardeningknowhow.com/edible/fruits/pear/pear-sooty-blotch-treatment.htm
https://ag.umass.edu/fruit/fact-sheets/pear-ipm-pear-scab
https://www.gardeningknowhow.com/edible/fruits/pear/pear-black-rot-information.htm
https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1971&context=extension_curall
