Goals and Objectives

The goal of the lecture portion is to provide students with an understanding of weed biology and ecology as related to characteristics associated with weediness, and an understanding of the principles of weed control, properties, action, and uses of herbicides.

The goal of the Weed Science Laboratory is to provide hands on experience for the management weeds with both chemical and biological methods. The main object of the lab is to provide students with skills needed to take on the job of weed management in variety crops produced in Hawaii using both conventional and no-tillage methods.

Students will gain an understanding of characteristics associated with weeds, weed control methods and herbicides, and to use this knowledge to support their analysis of weed problems and formulate control strategies.

An important skill that students will take away from the lab section is the ability to understand pesticide labels and deliver an effective dose of crop protection chemicals using a variety of both large and small equipment. Students will also obtain an understanding of IPM methods for weed management.

None

TPSS 200
and CHEM 152

Weed Science: Principles and Practices. (3rd edition), Ashton and Monaco. 1991.

Handbook of Hawaiian Weeds (eds. E. Haselwood and G. Motter this text is currently out of print), company literature on spray system parts and agricultural spray pumps. 

Recommended text for the lab is "Wayside Plants of the Islands" (W. Whistler).

• Vegetable Farmers and their weed-control machines
  
• No-till farming.
  
  

Dr. Philip Motooka

Field demonstrations conducted at Magoon Greenhouse facility

Lectures

• Losses from weeds and types of damage
  
• Weed classification, ecology, adaptations for weediness
  
• Weed propagule longevity, dormancy, germination
  
• Concept and examples of noxious weeds
  
• Weed control methods: cultural, crop competition, mechanical, biological, chemical
  
• Herbicide formulations and applications
  
• Herbicide behavior in plants: absorption, translocation
  
• Herbicide behavior in soils: adsorption, degradation, leaching
  
• Herbicide selectivity
  
• Weed species/biotype shifts and herbicide resistant weeds
  
• Action and uses of herbicides
  
• Weed management strategies for some crops of Hawaii
  
  

Laboratory

• Weed Identification and collection, grasses/ broadleaf and sedge weeds
  
• No-tillage farming and allelopathy in agroecosystems.
  
• Herbicide injury and diagnosis
  
• Spray equipment: nozzles, pumps and specialized applications systems
  
• Sprayer calibration, small sprayers, controlling spray drift.
  
• Living sods for weed control in tropical cropping systems.
  
• Pesticide labels and safety
  
  

	points	% of Total
Lecture examination I	50	10 %
Lecture examination II	70	14 %
Lecture examination III	70	14 %
Lecture examination IV	80	16 %
Lecture student presentation/outline	30	6 %
Laboratory	200	40 %
	500	100 %

	Points available	% of Final Grade
Weed I.D. quiz	30	15
Calibration homework	10	05
Calibration quiz	40	20
Written reports
1. Herbicide performance	20	10
2. Selected group reports
a) Oral seminar, group grade	10	05
b) Written report, group grade	10	05
Weed collections	30	15
Lab. final	50	25
Totals	200	100

LAB	GRADE
200-181	4.0
180-161	3.0
160-141	2.0
140-121	1.0
< 120	< 1.0

• Roy K. Nishimoto
  
• Joeseph DeFrank