Guava has a shorter gestation period than most fruit trees. The guava tree starts flowering as early as eight months from planting the seedlings in the fields. With proper care, each tree may yield about 15 kilos of fruits during the first year. By the second year, the tree could yield 45 kilos and in succeeding years, it could produce 60 kilos or more.Good quality fruits demands high price. The small fruits or those with scars which resulted from fruition caused by the wind during the fruits' formative stages are cheaper. There are usually made into guapple pie or into jam.One can start with a few mother trees from which subsequent planting materials are propagated. Guavas can be propagated by seed or through marcotting and grafting.The guava can be made fruitful throughout the year as long as it is irrigated during the summer months. The fruits responds to pruning. When the terminal buds is pinched, new branches are initiated and flowers will follow. With enough nourishment, the flowers will follow. With enough nourishment, the flowers will develop into full-sized fruits.During the first year, the young plants are fertilized soon after planting with one half kilo of 14-14-14 per tree. A month later, 15 grams of urea is applied per tree.Eight months after planting, when the trees start to flower, 300 grams of fertilizers is applied. This is a mixture of 16-20-0 and 0-0-60, applied usually in the early part of the rainy season and then before the end of the rainy season.
In the second year, the same kind of mixture is applied, and two times yearly. This time, the dose is one kilo per tree. In succeeding year, the dose is proportionately increased.

The trees should be sprayed monthly with insecticide and fungicide, especially when they are fruiting.

To protect the fruits from fruit fly, the developing fruits are wrapped with plastic bags when they are about the size of an eggs. The fruits are sprayed before they are wrapped.

To produce big fruits, some of the young fruits should be removed from the tree. To produce fruits that will weigh about a kilo each, allow only fruits to develop in a year-old tree.

While very big fruits look impressive, many growers prefer to produce fruits that weigh 300 to 350 grams each This size seems to be the most salable in the market.


City of San Fernando, La Union - Do you know that the guapple farms in Bauang, La Union is being bugged by several production problems?  Mari Cor Ramos, President of the Guapple Farmers  Association of Bauang, together with other guapple farmers revealed that they are having a hard time in controlling the insect pests and diseases infesting several guapple farms in Urayong and nearby barangays.
“White grubs or abal-abal almost completely devastated my farm”, lamented Mr. Amado Pulanco of Urayong, Bauang.  White grubs attack the guapples by eating the tips of the roots causing wilting and eventual death in heavily infested plants.  White grubs or June bettle is destructive during the 7-months larval stage living underneath the soil.

The Department of Science and Technology Region 1 (DOST 1), introduced appropriate technologies in a bid to help the Bauang guapple industry and the farmers thru the Consultancy for Agricultural Productivity Enhancement (CAPE) program.  Director Elsa Chan said thru the CAPE a team of entomologist, plant pathologist and crop production specialist were deployed to the guapple areas to validate the claims of the farmers and identify appropriate interventions.

The experts identified the other insects pests such as stem borer, fruitflies, leaf folder, aphids, mealy bug, white flies, and fruit piercing moth.

The experts also found that the guapples are also infected with fungus particularly attacking the fruits causing rotting in ripening and immature fruits.  Leaves infected with fungus have rusty spots or black areas. 

A Training on Pest, Disease and Fertilizer Management for Guapples was conducted on Nov 5 & 25 2010 for 22 guapple farmers in Urayong and DOST 1, respectively.  The participants were taught the life cycle of the insects, when they are harmful, and the appropriate prevention and control practices like, insect trap or baiting, proper application of clorpyrifos to control borer and  abal-abal and detergent sprays to control mealy bug, aphids and white flies.  Appropriate pesticide use was also presnted to avoid build-up of resistant insect population.

On the other hand, fungal diseases can be controlled thru clean practices like burning of infected fruits and leaves.  The kind of bagging material is presently being tested to come out with better bagging practice which could reduce fruit rotting.

Fertilization management was also taught to the farmers to improve the guapple stand and productivity.

The appropriate technologies are expected to improve the incoming harvests and income of the guapple farmers in La Union.

CAPE is funded by the Technology Application and Promotion Institute (TAPI) of DOST.