Department of Horticulture Visayas State University VISCA Baybay City, Leyte Name: Suyom M. Samuel Rating: _____________ Lab. Schedule: Thursday 1-4 Date: February 29, 2013

Weed Control Exercise no. 5c

Introduction: Weeds are unwanted plants in gardens that reduce available moisture, nutrients, sunlight and growing space needed by crop plants. Their presence can reduced crop growth, quality and yield. In addition, they can make harvest difficult. Weeds also provide cover for diseases, insects and animals. Garden weeds are hard to control because they grow rapidly, produce vast numbers of seeds, and spread aggressively by vegetative structures and/or seeds. Objectives: * To know how to manage and control weeds

Methodology: Weed control were performed by removing the weeds from a circular area with a radius of 50 cm from the base of a fruit tree. The time was recorded before and after ring-weeding operation for computing the cost of weeding. The tree major weed species were identified to their assigned fruit tree. Results: Table1. Speed of weeding (min/tree) Sample Tree Number | Time Spent in Weeding | Most Prevalent Weeds | 1 calamansi (Citrus madurensis) | 5 minutes | * Aguingay (Rottboellia cochinchinensis) | Table2. Cost of weeding Average Speed (min/tree) | Number of man-days | Cost/hectare | 5 minutes | 208.33 | | Discussion: We are aware that weeds are destructive to the plant that’s why we go to the field to remove the weeds of the plant calamanasi because it competes for the nutrients of the plant. Conclusion: Therefore it is concluded that weed control is important in order for the plants to grow well. Question: 1. What are the major differences in weed control practices employed between annual and perennial crops? 2. Aside from ring weeding other practices can be employed to minimize/prevent the growth of weeds in fruit tree orchards. Describe the procedure as the advantages of such technique over ring weeding. Answer: 1. The major differences between annual and perennial crops in weed control: * Annual crops – weed control practices by cultural and biological weed control. * Perennial crops – weed control practices by chemical, mechanical and biological weed control. 2. Other practices aside from ring weeding: * Hole weeding *

Department of Horticulture Visayas State University VISCA Baybay City, Leyte

Name: Gemmarie R. Asauro Rating: _____________ Lab. Schedule: Thursday 1-4 Date: February 29, 2013

Weed Control Exercise no. 5c

Introduction: Weed control is the botanical component of pest control, using physical and chemical methods to stop weeds from reaching a mature stage of growth when they could be harmful to domesticated plants and livestock. In order to reduce weed growth, many "weed control" strategies have been developed in order to contain the growth and spread of weeds. Weeds can compete with productive crops and often poisonous, distasteful, produce burrs, thorns or otherwise interfere with the use and management of desirable plants by contaminating harvests or excluding livestock.

Objectives: * To learn how to control the growth of weed

Methodology: All the students were randomly assigned to the fruit tree. The weeds of the fruit tree from the base of a circular area with a radius of 50 cm were removed. In order to calculate for the cost of weeding, a recorded time was used, the number of tree/hectare needed, and the rate/man-day. Also the weed species that were found were identified within one meter radius of assigned fruit tree.

Results: Table1. Speed of weeding (min/tree) Sample Tree Number | Time Spent in Weeding | Most Prevalent Weeds | 1 calamansi (Citrus madurensis) | 10 minutes | Aguingay (Rottboellia cochinchinensis) | Table2. Cost of weeding Average Speed (min/tree) | Number of man-days | Cost/hectare | 10 minutes | | | Discussion: We all know that weeds are grown everywhere and we don’t want our plants to compete for space, nutrients, water and light in order the weeds to survive, so a technique is used to prevent them to thrive. Every student was assigned to weeding the calamansi tree. The technique that we used is ring-weeding. In ring-weeding the particular tree were removed from the circular area from the base of the calamansi tree with the use of our bare hands. As the result the time spent recorded is 10 minutes. Conclusion: Therefore, to control the growth of weeds is to eradicate the weeds while they are still small to prevent weed germination and growth. Question: 1. What are the major differences in weed control practices employed between annual and perennial crops? Answer: The major differences between annual and perennial crops in weed control: * Annual crops – weed control practices by cultural and biological weed control. * Perennial crops – weed control practices by chemical, mechanical a 2. Aside from ring weeding other practices can be employed to minimize/prevent the growth of weeds in fruit tree orchards. Describe the procedure as the advantages of such technique over ring weeding. Answer: