diff --git a/kube-core/src/params.rs b/kube-core/src/params.rs
index 19461ce75..c608728db 100644
--- a/kube-core/src/params.rs
+++ b/kube-core/src/params.rs
@@ -183,6 +183,15 @@ pub struct PostParams {
 }
 
 impl PostParams {
+    pub(crate) fn populate_qp(&self, qp: &mut form_urlencoded::Serializer<String>) {
+        if self.dry_run {
+            qp.append_pair("dryRun", "All");
+        }
+        if let Some(ref fm) = self.field_manager {
+            qp.append_pair("fieldManager", fm);
+        }
+    }
+
     pub(crate) fn validate(&self) -> Result<(), Error> {
         if let Some(field_manager) = &self.field_manager {
             // Implement the easy part of validation, in future this may be extended to provide validation as in go code
diff --git a/kube-core/src/request.rs b/kube-core/src/request.rs
index 40b9ee61b..f82c0be55 100644
--- a/kube-core/src/request.rs
+++ b/kube-core/src/request.rs
@@ -115,9 +115,7 @@ impl Request {
         pp.validate()?;
         let target = format!("{}?", self.url_path);
         let mut qp = form_urlencoded::Serializer::new(target);
-        if pp.dry_run {
-            qp.append_pair("dryRun", "All");
-        }
+        pp.populate_qp(&mut qp);
         let urlstr = qp.finish();
         let req = http::Request::post(urlstr).header(http::header::CONTENT_TYPE, JSON_MIME);
         req.body(data).map_err(Error::BuildRequest)
@@ -192,9 +190,7 @@ impl Request {
     ) -> Result<http::Request<Vec<u8>>, Error> {
         let target = format!("{}/{}?", self.url_path, name);
         let mut qp = form_urlencoded::Serializer::new(target);
-        if pp.dry_run {
-            qp.append_pair("dryRun", "All");
-        }
+        pp.populate_qp(&mut qp);
         let urlstr = qp.finish();
         let req = http::Request::put(urlstr).header(http::header::CONTENT_TYPE, JSON_MIME);
         req.body(data).map_err(Error::BuildRequest)
@@ -226,9 +222,7 @@ impl Request {
     ) -> Result<http::Request<Vec<u8>>, Error> {
         let target = format!("{}/{}/{}?", self.url_path, name, subresource_name);
         let mut qp = form_urlencoded::Serializer::new(target);
-        if pp.dry_run {
-            qp.append_pair("dryRun", "All");
-        }
+        pp.populate_qp(&mut qp);
         let urlstr = qp.finish();
         let req = http::Request::post(urlstr).header(http::header::CONTENT_TYPE, JSON_MIME);
         req.body(data).map_err(Error::BuildRequest)
@@ -265,9 +259,7 @@ impl Request {
     ) -> Result<http::Request<Vec<u8>>, Error> {
         let target = format!("{}/{}/{}?", self.url_path, name, subresource_name);
         let mut qp = form_urlencoded::Serializer::new(target);
-        if pp.dry_run {
-            qp.append_pair("dryRun", "All");
-        }
+        pp.populate_qp(&mut qp);
         let urlstr = qp.finish();
         let req = http::Request::put(urlstr).header(http::header::CONTENT_TYPE, JSON_MIME);
         req.body(data).map_err(Error::BuildRequest)
diff --git a/kube-core/src/subresource.rs b/kube-core/src/subresource.rs
index ae180d7df..ef527807d 100644
--- a/kube-core/src/subresource.rs
+++ b/kube-core/src/subresource.rs
@@ -102,9 +102,7 @@ impl Request {
         let pp = &ep.post_options;
         pp.validate()?;
         let mut qp = form_urlencoded::Serializer::new(target);
-        if pp.dry_run {
-            qp.append_pair("dryRun", "All");
-        }
+        pp.populate_qp(&mut qp);
         let urlstr = qp.finish();
         // eviction body parameters are awkward, need metadata with name
         let data = serde_json::to_vec(&serde_json::json!({