Sawflies


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Sawflies

 

insects of the family of true sawflies, order Hymenoptera, pests in berry fruit cultures. The most harmful are the pear slug sawfly and the plum leaf sawfly, which are found on all continents; in the USSR they cause crop losses nearly everywhere. The pear slug sawfly (Caliroa limacina) is 4-5 mm in length and is black in color. In the USSR it chiefly harms the sour cherry, sweet cherry, plum, black-thorn, pear, and quince. There are one, two, or three generations annually. The larvae eat the flesh of leaves, leaving untouched the veins and the underside of the epidermis. The plum leaf sawfly (Cladius pallipes) damages many plant cultures, especially the sour cherry, sweet cherry, blackthorn, mountain ash, pear, raspberry, and strawberry. There are two, three, or four generations a year. The larvae eat round holes in the leaves between the veins. When they multiply at a great rate, they can strip plants bare. Countermeasures include treating the plants with insecticide and fall ploughing and spading of the soil in trunk circles.

References in periodicals archive ?
Like their host plants, the nematines are most common in northern latitudes, and in the Arctic they are virtually the only sawflies present (Gauld and Bolton 1988; Price and Roininen 1993).
An instrument called a gas chromatograph separates the complicated blend of chemicals found in the air around wheat plants swarming with sawflies. The compounds emerge from the instrument one by one and are sent simultaneously to two detectors--one that senses all compounds and the one that includes the antenna.
Euura sawflies also display a positive preference-performance relationship (Dodge and Price 1991), as do many other insect species (see reviews in Thompson [1988], and Thompson and Pellmyr [1991]).
atra was studied using adult sawflies from five willow species: Salix fragilis, S.
In addition to the Lygus bug, which damages alfalfa, cotton, strawberry, and many other crops, the scientists at EBCL are rearing parasites collected from wheat stem sawflies and olive fruit flies.
Survival of pine sawflies in cocoon stage in relation to resin acid content of larval food.
Geographic variation in the field response of male European pine sawflies, Neodiprion sertifer, to different pheromone stereoisomers and esters.
The company has also developed an all-round treatment aimed at fruit and veg growers which tackles the underground larval stage of common veg pests such as carrot fly, sciarid fly, cabbage root fly, sawflies, onion flies and codling moths.
The gregarious nature of pine sawflies result in their contact with excrement from the midgut after infection, which accelerates the rapid spread of the virus in the pine sawfly, leading to death within 4-7 d after infection (5-7,14).
After emergence of sawflies and parasitoids was complete (that is to say, there were no sawflies or parasitoids emergence), all remaining cocoons were dissected and their condition (i.e., the status of the diprionid adults and larvae, and parasitism) was recorded.
Strong sprays of water will control aphids, pear and rose sawflies, spider mites, and thrips.