Land development and Transition About Pest The development of oil palm plantations each year is increasing very rapidly. Plantation development typically begins with the opening of new fields of secondary forest area or vacant land into oil palm plantations. Land conversion may cause effects negated in the cultivation of oil palm plantations. One is a change in pest status or permalahan emergence of pests. The emergence of these problems resulting from the transition of foodstuffs of forest pest organisms into oil palm pests, other than that this transition will also improve the status of secondary pests become primary pests are supported with reduced primary pests and natural enemies. One of the transitional status of pests that have been reported to occur in several oil palm plantations in Riau is the emergence of a new type of caterpillar pests sac. Silkworm sac sac is somewhat different from usual caterpillar attack palm oil, which is Metisa plana, Mahesena corbetti and Pteroma pendula. Symptoms attacks caused by worms sac is also different from the caterpillar sac that usually attacks the palm.
Symptoms of damage to the palm leaves palm leaves are attacked is to be perforated , such as burning
and milidi dries . Symptoms of damage to the burned palm leaves as a specific characteristic symptoms are common worm attack sac . But symptoms Clania Tertia attacks on palm leaves , leaving only a stick. Common symptoms of worm attacks such as fire . Based on observations in the field with a very high population , damage can result in less header and declining yields next semester . Until now , Clania Tertia has caused damage to the plant oil palm area of + 10,000 ha .
Monitoring and Control
Monitoring
Population monitoring method used is a combination of methods Purba and Desmier de chenon using global observations per month , and observations effective when the pest population has reached a
critical population threshold . Critical population threshold Clania sp . Is 5-10 individuals per frond .
Control
Physical control
Controlling by quoting the immature larvae ( TBM ) and mounting Light trap for the trapping of adult males to prevent copulation .
Symptoms of damage to the palm leaves palm leaves are attacked is to be perforated , such as burning
and milidi dries . Symptoms of damage to the burned palm leaves as a specific characteristic symptoms are common worm attack sac . But symptoms Clania Tertia attacks on palm leaves , leaving only a stick. Common symptoms of worm attacks such as fire . Based on observations in the field with a very high population , damage can result in less header and declining yields next semester . Until now , Clania Tertia has caused damage to the plant oil palm area of + 10,000 ha .
Monitoring and Control
Monitoring
Population monitoring method used is a combination of methods Purba and Desmier de chenon using global observations per month , and observations effective when the pest population has reached a
critical population threshold . Critical population threshold Clania sp . Is 5-10 individuals per frond .
Control
Physical control
Controlling by quoting the immature larvae ( TBM ) and mounting Light trap for the trapping of adult males to prevent copulation .
Chemical control This control can be done with a variety of
technical , infusion of roots and spraying crops under 7 years old and stem injection to plant over 7 years . The active ingredient is used as acephate at a dose of 10 g / 100ml / principal , and dimehipo with a dose of 10-20ml / principal .
technical , infusion of roots and spraying crops under 7 years old and stem injection to plant over 7 years . The active ingredient is used as acephate at a dose of 10 g / 100ml / principal , and dimehipo with a dose of 10-20ml / principal .
Silkworm these bags
is common on acacia plants which is the main host plants. The shift in land use
from forest land contained acacia plants into oil palm plantations leads to
changes in eating patterns of worm case. This pest is the burst was supported
by competitors and the loss of natural enemies that are in the initial habitat,
abundant food sources are palm leaves grown in monoculture in a very wide area.
Clania, New Pouch Type Worm That Attacks Palm Oil The results conclude that the
identification of new types of the caterpillar bag adalaha Clania Tertia.
Silkworm sac is classified as very voracious leaf eaters, capable of eating the
leaves of + 4.789 cm / day. Spacious eating area larger than the area of
eating Metisa plana + 2.833 cm / day and Mahasena corbetti + 3.448 cm / day.
Spacious dining area wider than Metisa plana and Mahasena corbetti confirms
that Clania as voracious leaf defoliator.