POSSIBLE PESTS TO OCCUR FOR THE SECOND QUARTER OF 2016

Pests	Number of possible sites to be affected	Possible areas to be affected		Triggering Conditions
		Region	Province
RODENT	25 SITES	6	Capiz	1. Absence of effective vertebrate predation has better chances for successful breeding.
			Iloilo
			Antique
		2	Nueva Vizcaya	2. Asynchronous planting.
			Isabela	3. No fallow period.
		9	Zamboanga del Sur
		5	Albay
			Sorsogon
			Masbate
		13	Surigao del Norte
		1	La Union
			Pangasinan
		11	Davao Oriental
		3	Aurora
		8	Samar
STEMBORER	10 SITES	6	Antique	1. Excessive use of nitrogen fertilizer
			Capiz	2. Asynchronous planting.
		5	Camarines Sur	3. No fallow period.
			Sorsogon
			Albay
			Masbate
		8	Leyte
		1	La union
		2	Nueva Vizcaya
		9	Zamboanga del Sur
TUNGRO	8 SITES	5	Camarines Sur	1. Frequent spraying of insecticide
			Camarines Norte	2. Asynchronous planting.
			Sorsogon	3. No fallow period.
		9	Zamboanga del Sur	4. Excessive use of nitrogen fertilizer
		6	Iloilo
		8	Leyte
ARMYWORM	5 SITES	9	Zamboanga del Sur	1. Combination of high temperature and high humidity.
			Zamboanga del Norte
		11	Davao del Sur	2. No fallow period.
			Davao del Norte	3. Dry season starts earlier than usual.
			Davao Oriental	4. Prolonged drought followed by heavy rains.
		5	Albay
			Catanduanes	5. Presence of undisturbed vegetation in the production area.
			Camarines Sur
			Sorsogon
		4-A	Quezon
			Batangas
		6	Antique
		12	North Cotabato
			Sarangani
			South Cotabato
			Sultan Kudarat
		1	La Union
		2	Cagayan
		ARMM	Lanao del Sur

 

Other pests that might occur occasionally by second quarter based on historical records

• Rice bug, defoliator, rice black bug and bacterial leaf blight.

 

PEST MANAGEMENT ADVISORIES

Rodent

During fallow period

• Community Trap Barrier System

Before seed sowing

• Chemical control
  • Acute rodenticide = Pre-baiting: before seeding or before transplanting -use acute (single-dose) poison
    • Zinc phosphide
    •   Chronic rodenticide = 2 WAT: 5 baiting stations/ha (6 tbsp./station) use chronic (multiple-dose)
      • -Coumatetralyl (Racumin)

During land preparation

• Sanitation
• Rat burrow management
• Night rat hunting

Maximum tillering

• Increase water level

Booting stage

• Organize community wide rat hunting
• Flooding
• Use of flame thrower 
• Use of trap 

 

Stemborer

Before sowing

ü  Thorough land preparation to kill larvae and pupae

ü  Plant rice varieties that are  moderately resistant to stem borer

ü  Practice synchronous planting- allows fewer stem borer generation within the cropping season-reducing damage.

At seedbed and transplanting

ü  Hand pick and destroy egg masses

ü  Raise water level periodically to submerge egg masses deposited on the lower parts of the plant.

ü  Before transplanting. Cut leaf-top to reduce carry-over of egg masses from seedbed to the field

ü  Follow recommended N fertilizer application. High N increases crop susceptibility to stem borers

After transplanting

ü  Field release of Trichogramma japonicum (egg parasitoid)

ü  Judicious application of insecticides

ü  Use insecticides as a last resort – and only when needed to conserve natural enemies

     (Larvae are inside the stem and eggs are minimally killed by insecticides)

 

 Tungro

ü  Synchronous planting (planting on same dates)

ü  Plant tungro or leafhopper resistant varieties

ü  Practice fallow (rest) period

ü  Seriously infected fields should be plowed under when severe symptoms appear

ü  Rogue or pull out diseased plants during the first 6 weeks of crop growth in slightly (3% or less) infected areas

ü  Remove weeds that look like alternative hosts because virus-infected hoppers breed in weedy areas

ü  Avoid excessive application of nitrogenous fertilizers

ü  Control the insect vector using biological control agents and chemical insecticide as last resort

 

Armyworm

Cultural Methods

ü  Practice fallow (rest) period of 2-3 months to break the life cycle of the pest

ü  Egg masses and larvae should be collected and crushed

ü  Remove alternate hosts

ü  Plow under plant debris after harvest

ü  Follow recommended fertilizer requirement

ü  Crop rotation with root crops, cotton and other non-graminae plants

ü  Lower plant population per hectare or increase planting distance to allow sunlight to penetrate

Biological Control

ü  Use of Biological Control Agents such as predators (spiders), parasitoids (wasps) and entomopathogens (NPV)

Chemical Control

Chemical control (use pyrethroids, methomyl, chlorpyrifos, triazophos insecticides)