
_____________________________________________________________________
This leaflet is produced by the Ministry of Agriculture & Livestock, Solomon Islands, with support
from IPPSI: Improved Plant Protection in Solomon Islands, a project financed by ACIAR, the
Australian Centre for International Agricultural Research, Canberra. Authors: Helen Tsatsia, MAL &
Grahame Jackson, TerraCircle Inc.
Extension Fact Sheet 39:
Sliperi kabis Jassid
Common name: Leafhopper or jassid
Scientific name: Amrasca. The species
reported on okra worldwide is A biguttula
biguttula (another name is Amrasca devastans), and this may be the same as that
attacking sliperi kabis in Solomon Islands. It has not yet been identified.
Hosts: In Solomon Islands, it has been found only on sliperi kabis, but this jassid is
also known from okra, peanut, soybean and other legumes, cotton, eggplant and a
number of minor hosts.
Damage
The jassids (photo, right) cause the leaves to turn yellow in patches and even turn
white at the edges (photo, left). In Solomon Islands, the number of insects per leaf is
small in relation to the damage, so it is possible that the jassids inject a toxin as they
feed. In Papua New Guinea, large numbers occur on the leaves and cause the leaves to
dry up, beginning at the leaf margins, and die prematurely, especially during times of
low rainfall. The damage reduces the number of leaves available for consumption, and
may also reduce their nutritional content, although this has not been tested.
Biology and Life Cycle
Eggs are laid in the leaves and the leaf stalks. The egg hatch in 8-10 days, and the
yellow-green nymphs look similar to the adults except in size, and the fact that they
are wingless. They moult four times before they are mature; they are then about 2 mm
long. Both nymphs and adults are wedge-shaped. It is likely that the life cycle is
complete within 2 weeks.
Jassid populations are influenced by rainfall. High rainfall causes many deaths of
nymphs and adults.

_____________________________________________________________________
This leaflet is produced by the Ministry of Agriculture & Livestock, Solomon Islands, with support
from IPPSI: Improved Plant Protection in Solomon Islands, a project financed by ACIAR, the
Australian Centre for International Agricultural Research, Canberra. Authors: Helen Tsatsia, MAL &
Grahame Jackson, TerraCircle Inc.
Detection and Inspection
Look at the leaves and see if they have light yellow to white patches. Look at the
underside of the leaf and find the jassids. There may not be many present on each leaf.
The leaves may be more crinkled than normal, but this is difficult to see, as leaves of
some varieties of sliperi kabis are crinkled even when healthy. It is easier to see the
jassids if dark paper is put beneath the leaves, and they are then shaken or given a
sharp tap.
Management
Natural enemies:
A number of natural enemies have been reported worldwide. The larvae of lady
beetles and lacewings, spiders and other predators attack both adults and nymphs.
Tiny wasps are also reported that attack the eggs of jasssid. Bacteria, Bacillus
thuringiensis kurstaki, have been recorded attacking nymphs and adults. Whether or
not these or other natural enemies are present in
Solomon Islands, and attack jassids in the same
way, is not known.
Resistant varieties:
One variety appears to have resistance (photo,
right). This is a variety from the Western
Province. It may be an introduction from Papua
New Guinea. The leaves are deeply dissected
into long narrow leaflets, with a waxy green
surface and dark leaf stalks; the plant is tall and
narrow. See Kastom Gaden Association for
details and planting material.
Chemical control:
Use insecticides that have fast action and low residual effect, that is, they break down
quickly. The aim is to do the least harm to the natural enemies.
• In Papua New Guinea, Derris (Derris ellipica) is recommended. Derris contains
rotenone, an insecticide. Derris is planted within or around sliperi kabis plots,
ready for use when required. The roots are used to make a spray. Solomon Islands
has a variety from PNG that also has a high rotenone concentration. See MAL and
KGA for a supply of plants and ways to make the spray.
• Alternatively, use synthetic pyrethroid, such as lambda cyhalothrin or permethrin,
which are available in Honiara.
• For experimental use, try those products that contain disease-causing organisms,
such as spinosad (Success) and Bt – Bacillus thuringiensis kurstaki. Spinosad and
Bt are sometimes sold in Honiara. Note, under Natural enemies above, Bt has
been found to kill nymphs and adults.
• READ THE INSTRUCTIONS BEFORE USING ANY OF THESE
PESTICIDES.