Organic Farming

Today is May 17, 2006

Bagging of mango fruits for lower insect and disease damage in fruits

This is a well-known practice but information is lacking on its effects on the external/internal characteristics of the fruits, the appropriate bagging materials, and the economics of its adoption.

Thus, Zamora (BPI-NMRDC) evaluated the different kinds of bagging materials for mango fruits at the National Mango Research and Development Center (NMRDC) orchard in Jordan, Guimaras. Bagging materials used were from 1) brown paper bag, 2) thin waxy magazine, 3) thick waxy magazine, 4) yellow page telephone directory, 5) imported newspaper, and 6) local newspaper with lorsban-impregnated plastic strips. At 35 days after flower induction (DAFI), the trees were evaluated and those with 70-80% fruit set were selected. Fruits were bagged at 47-57 DAFI when they attained ‘marble’ size. Rectangular bags were prepared by measuring 5.5 x 8.0 in. For each material, 100 fruits were bagged.

Findings

Bagged fruits had high recovery of marketable fruits over the unbagged ones. Imported newspaper, thin waxy magazines, and thick waxy magazines resulted in fruits having the highest marketable yields in different seasons with average of 13.92, 13.01, and 12.42 kg of fruits, respectively.
Brown paper bags (17.74 kg) and local newspaper with lorsban-impregnated plastic strips (13.09 kg) were also found promising. However, results showed that the highest material and labor cost per 100 fruits was recorded on brown bag materials with P32.25.
Bagging with different paper materials resulted in fruits with lower insect and disease damage, and minimized fruits quality defects. Thick waxy magazine significantly prevented fruit fly damage with infestation ranging from 0 to less than 1%.
Bagged and unbagged fruits were not significantly different in their external (except in
corded per 100 fruits with P23.12, P22.84, and P20.02, respectively. Those materials can help reduce insect and disease damage and minimize quality defects of mango fruits. However, source and availability of these materials need to be considered. Brown paper bags and local newspapers are recommended only during dry season since these materials are easily destroyed during rainy days.

Source: PCARRD, 2004. Highlights 2003, Los Banos, Laguna

Organic Farming Information Network
Philippine Council for Agriculture, Forestry and Natural Resources Research and Development (PCARRD)
©2006

Today is May 17, 2006
	Bagging of mango fruits for lower insect and disease damage in fruits
	This is a well-known practice but information is lacking on its effects on the external/internal characteristics of the fruits, the appropriate bagging materials, and the economics of its adoption. Thus, Zamora (BPI-NMRDC) evaluated the different kinds of bagging materials for mango fruits at the National Mango Research and Development Center (NMRDC) orchard in Jordan, Guimaras. Bagging materials used were from 1) brown paper bag, 2) thin waxy magazine, 3) thick waxy magazine, 4) yellow page telephone directory, 5) imported newspaper, and 6) local newspaper with lorsban-impregnated plastic strips. At 35 days after flower induction (DAFI), the trees were evaluated and those with 70-80% fruit set were selected. Fruits were bagged at 47-57 DAFI when they attained ‘marble’ size. Rectangular bags were prepared by measuring 5.5 x 8.0 in. For each material, 100 fruits were bagged. Findings Bagged fruits had high recovery of marketable fruits over the unbagged ones. Imported newspaper, thin waxy magazines, and thick waxy magazines resulted in fruits having the highest marketable yields in different seasons with average of 13.92, 13.01, and 12.42 kg of fruits, respectively. Brown paper bags (17.74 kg) and local newspaper with lorsban-impregnated plastic strips (13.09 kg) were also found promising. However, results showed that the highest material and labor cost per 100 fruits was recorded on brown bag materials with P32.25. Bagging with different paper materials resulted in fruits with lower insect and disease damage, and minimized fruits quality defects. Thick waxy magazine significantly prevented fruit fly damage with infestation ranging from 0 to less than 1%. Bagged and unbagged fruits were not significantly different in their external (except in corded per 100 fruits with P23.12, P22.84, and P20.02, respectively. Those materials can help reduce insect and disease damage and minimize quality defects of mango fruits. However, source and availability of these materials need to be considered. Brown paper bags and local newspapers are recommended only during dry season since these materials are easily destroyed during rainy days. Source: PCARRD, 2004. Highlights 2003, Los Banos, Laguna
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