The Effects of Different Formulated Organic Pesticides to the Prevention of Occurance of Pests

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THE EFFECTS OF DIFFERENT FORMULATED
ORGANIC PESTICIDES TO THE PREVENTION
OF OCCURANCE OF PESTS

Reaman S. Balois
Paulene Andrea D. Pontela

THESIS REPORT

Republic of the Philippines
ISABELA STATE UNIVERSITY
Roxas, Isabela

THE EFFECTS OF DIFFERENT FORMULATED
ORGANIC PESTICIDES TO THE PREVENTION
OF OCCURANCE OF PESTS

Thesis outline presented to the faculty and staff of Isabela State University, Roxas, Isabela in partial fulfilment of the requirements for High School for the School Year 2011-2012. Prepared by the

High School students under the supervision and guidance of
Dr. Josue D. Mendoza and our adviser,Mr. Saturnino Corotan

I.INTRODUCTION
A.Importance of the study
PECHAY
Introduction
Pechay (Brassica rapa L. cv group Pak Choi) is an erect, biennial herb, cultivated as an annual about 15-30 cm tall in vegetative stage. Ovate leaves are arranged spirally and spreading. The petioles are enlarged and grow upright forming a sub cylindrical bundle. Inflorescence is a raceme with pale yellow flowers. Seeds are 1 mm in diameter and are reddish to blackish brown in color. 1

Uses and Nutritional Value
Pechay is used mainly for its immature, but fully expanded tender leaves. the succulent petioles are often the preferred part. It is used as main ingredient for soup and stir-fried dishes. In Chinese cuisine, its green petioles and leaves are also used as garnish. Each 100 g fresh edible portion contains:

NutrientsAmount
Water 93.0 g
Protein 1.7 g
Fat 0.2 g
Carbohydrates 3.1 g
Fiber 0.7 g
Ash 0.8 g
B-carotene 2.3 g
Vitamin C 53.0 g
Calcium 102.0 mg
Phosphorus 46.0 mg
Iron 2.6 g
Energy Value 86.0 kJ

2
Production Management
Varieties
Black Behi; Hari Digma; Shin Kang
Genghis Khan; Shanhai No. 2

Climatic and Soil Requirements
Pechay can be grown low to mid elevations throughout the year. Production is best, however, during the dry season in sandy to clay loam soil, with a pH of 5.5-5.6.

Planting
Pechay can either be sown directly in soil or transplanted. Direct seeding is carried out by broadcasting or by sowing in rows. Cover seeds to a depth of about 1 cm by raking or spreading additional topsoil. Water immediately after sowing. Plant spacing should be 10 cm between plants and 20 cm between rows.

If transplanted, sow seeds initially in seedbeds. Transplant seedlings 2-3 weeks after sowing at a distance of 10 cm between plants and 20 cm between rows. Transplant preferably in the afternoon and water immediately. Mulch with grass clippings or rice straw.

Fertilization
Apply seedlings with starter solution using Vermi compost/FPJ at rate of 2 tbsp/1 litter of water. Side dress along the rows at the rate of 2 tbsp/1 litter one week after transplanting at early morning or late afternoon.

3

Pest and Disease Management

Damping-off, soft rot and clubroot are the most important disease of pechay, while diamondback moth and aphids are the major insect pests. Spraying hot pepper extract can control these pests. When seedlings begin to wilt, reduce watering immediately. Uproot and burn disease-infected plants to prevent spread of diseases. Cultivation is also necessary to minimize weeds.

Harvesting
Harvest as early as three weeks after planting or between 30-40 days after sowing. Harvest preferably in the afternoon to minimize postharvest losses.

Upon harvesting, wash the plants, trim old leaves and remove roots. Grade according to size and quality, pack in strong rigid containers with holes at the sides to allow...
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