---
type: "Bill"
title: "Agriculture - Mosquito Control - Notification to Municipalities"
description: "Agriculture - Mosquito Control - Notification to Municipalities"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2018"
identifier: "HB 400"
citation: "Maryland HB 400 (2018)"
classification: ["bill"]
subjects: ["Agriculture", "Administrative Agencies", "Agriculture", "Diseases", "Environmental Matters", "Health", "Insects", "Municipal Corporations", "Notices", "Pest Control", "Time"]
status: "enacted"
primary_sponsors: ["Tarlau"]
version_count: 1
action_count: 14
vote_count: 2
first_action: "2018-01-24"
last_action: "2018-04-24"
source: "openstates"
source_identifier: "ocd-bill/99767477-fdf0-4c35-bfba-5cc438af61e2"
source_url: "http://mgaleg.maryland.gov/webmga/frmMain.aspx?id=HB400&stab=01&pid=billpage&tab=subject3&ys=2018rs"
source_hash: "f24a82e7b56a6f103983210e2a0c1218cbb32ad11e017f51e735d09cb4498c5f"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-md"]
---

# Maryland HB 400 (2018) — Agriculture - Mosquito Control - Notification to Municipalities

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Bill Text** (committee substitute) — [source](http://mgaleg.maryland.gov/2018RS/bills/hb/hb0400f.pdf)

## Votes

- On Third Reading — **133–0** (pass) · lower
- On Third Reading — **46–0** (pass) · upper

## Sponsors

- Tarlau — primary (person)
- A. Miller — cosponsor (person)
- A. Washington — cosponsor (person)
- Angel — cosponsor (person)
- Barron — cosponsor (person)
- Carr — cosponsor (person)
- Chang — cosponsor (person)
- Ebersole — cosponsor (person)
- Fennell — cosponsor (person)
- Frush — cosponsor (person)
- Gutierrez — cosponsor (person)
- Hettleman — cosponsor (person)
- J. Lewis — cosponsor (person)
- Korman — cosponsor (person)
- Krimm — cosponsor (person)
- Lafferty — cosponsor (person)
- Lierman — cosponsor (person)
- Luedtke — cosponsor (person)
- Morales — cosponsor (person)
- Mosby — cosponsor (person)
- P. Young — cosponsor (person)
- Patterson — cosponsor (person)
- Pena-Melnyk — cosponsor (person)
- Proctor — cosponsor (person)
- Queen — cosponsor (person)
- Sanchez — cosponsor (person)
- Shoemaker — cosponsor (person)
- Sophocleus — cosponsor (person)
- Wilkins — cosponsor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2018-01-24** First Reading Environment and Transportation `referral-committee`
- **2018-01-24** Hearing 2/07 at 1:00 p.m.
- **2018-02-19** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2018-02-20** Favorable with Amendments {970411/1 Report Adopted `committee-passage-favorable`
- **2018-02-20** Second Reading Passed with Amendments
- **2018-02-22** Third Reading Passed (133-0) `passage`
- **2018-02-23** First Reading Education, Health, and Environmental Affairs `referral-committee`
- **2018-03-15** Hearing 3/20 at 1:00 p.m.
- **2018-03-26** Favorable Report by Education, Health, and Environmental Affairs `committee-passage-favorable`
- **2018-03-27** Favorable Report Adopted `committee-passage-favorable`
- **2018-03-27** Second Reading Passed
- **2018-03-28** Third Reading Passed (46-0) `passage`
- **2018-03-29** Returned Passed
- **2018-04-24** Approved by the Governor - Chapter 296 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/99767477-fdf0-4c35-bfba-5cc438af61e2`. Confidence: reported (aggregated from official Maryland legislature records).